General
- Add methods to access current Glean debugging settings and the list of currently registered pings(Bug 1921976).
- Require glean_parser v16.1.0 (#3006)
- BREAKING CHANGE: Add new collection-enabled mode (and follows_collection_enabled setting for pings). This allows to control a subset of pings independently from the Glean-wide upload-enabled flag. This deprecates the setUploadEnabled API in favor of setCollectionEnabled. (#3006)
Rust
- Permit Glean shutdown to interrupt UploadManager Wait tasks (bug 1928288)

v62.0.0 (2024-11-05)

Full changelog

General
- BREAKING: Remove LMDB-to-safe-mode migration. Safe-mode became the default in Glean v51. (bug 1780370)
- BREAKING: Stop sending buckets with 0 counts in memory_distribution and timing_distribution metric payloads (bug 1898336)
- Require glean_parser v15.2.0 (bug 1925346)
- Disabled the glean.database.write_time metric as the instrumented behavior was triggering metrics pings to be sent containing only that metric (Bug 1928168)
Rust
- New Metric Type: labeled_quantity (bug 1925346)

v61.2.0 (2024-10-07)

Full changelog

Kotlin
- Accept a ping schedule map on initialize (#2967)
Swift
- Accept a ping schedule map on initialize (#2967)

v61.1.0 (2024-09-24)

Full changelog

Kotlin
- Change Metrics Ping Scheduler to use daemon threads (#2930)
- Dispatch metric recording for event, object and timing distribution on the task queue (#2942)
Rust
- Experimental: Buffered API for timing, memory and custom distribution (#2948)

v61.0.0 (2024-08-21)

Full changelog

General
- BREAKING CHANGE: Updated to UniFFI 0.28.0 (#2920)
- BREAKING CHANGE: Update to glean_parser v15.0.0 (release notes)
Kotlin
- BREAKING CHANGE: Remove now obsolete type alias (#2935)

v60.5.0 (2024-08-06)

Full changelog

General
- Make auto-flush behavior configurable and time-based (#2871)
- Require glean_parser v14.5.0 (#2916)
Android
- Update to Gradle v8.9 (#2909)
- Fixed GleanTestLocalServer test rule to prevent leaking between tests(Bug 1787234)
Rust
- Remove cargo feature preinit_million_queue and set the default pre-init queue size to 10^6 for all consumers (Bug 1909246)

v60.4.0 (2024-07-23)

Full changelog

General
- Bump the string length limit to 255 characters (#2857)
- New metric glean.database.write_time to measure database writes (#2845)
- Require glean_parser v14.3.0 (bug 1909244)
Android
- Delay log init until Glean is getting initialized (#2858)
- Update to Gradle v8.8 (#2860)
- Updated Kotlin to version 1.9.24 (#2861)
- Default-enable delayPingLifetimeIo (#2863)
- Preparing Glean to be able to remove service-glean from Android Components (#2891)
- Gradle Plugin: Support for using an external Python environment (#2889)
Rust
- New Metric Types: labeled_custom_distribution, labeled_memory_distribution, and labeled_timing_distribution (bug 1657947)

v60.3.0 (2024-05-31)

Full changelog

Android
- Allow configuring delayPingLifetimeIo in Kotlin and auto-flush this data after 1000 writes. It is also auto-flushed on background. (#2851)

v60.2.0 (2024-05-23)

Full changelog

Rust
- Accept a ping schedule map on initialize (#2839)

v60.1.1 (2024-05-31)

Full changelog

Android
- Allow configuring delayPingLifetimeIo in Kotlin and auto-flush this data after 1000 writes. It is also auto-flushed on background. (#2851) (Backported changes)

v60.1.0 (2024-05-06)

Full changelog

Rust
- New TimingDistribution API for no-allocation single-duration accumulation. (bug 1892097)
Python
- Replace use of deprecated functionality (and make installs work on Python 3.12) (#2820)

v60.0.1 (2024-05-31)

Full changelog

Android
- Allow configuring delayPingLifetimeIo in Kotlin and auto-flush this data after 1000 writes. It is also auto-flushed on background. (#2851) (Backported changes)

v60.0.0 (2024-04-22)

Full changelog

General
- BREAKING CHANGE: Server Knobs API changes requiring changes to consuming applications which make use of Server Knobs (Bug 1889114)
- BREAKING CHANGE: Deprecated Server Knobs API setMetricsDisabled has been removed from all bindings. (#2792)
- Added support for ping_schedule metadata property so that pings can be scheduled to be sent when other pings are sent. (#2791)
Android
- Updated Kotlin to version 1.9.23 (#2737)
- New metric type: Object (#2796)
iOS
- New metric type: Object (#2796)
Python
- New metric type: Object (#2796)

v59.0.0 (2024-03-28)

Full changelog

General
- Hide glean_timestamp from event extras in tests (#2776)
- Timing Distribution's timer ids now begin at 1, rather than 0, to make some multi-language use cases easier. (2777)
- Add a configuration option to disable internal pings (#2786)
- Updated to UniFFI 0.27.0 (#2762)

v58.1.0 (2024-03-12)

Full changelog

General
- Enable wall clock timestamp on all events by default (#2767)
Rust
- Timing distribution and Custom distributions now expose accumulate_single_sample. This includes their traits and consumers that make use of them will need to implement the new functions (Bug 1881297)
Android
- Timing and Custom Distributions now have a accumulate_single_sample API that don't require use of a collection (Bug 1881297)
Python
- Timing Distributions now have both a accumulate_samples and accumulate_single_sample (Bug 1881297)

v58.0.0 (2024-02-29)

Full changelog

General
- Update glean_parser to v13.0.0 (release notes)
Rust
- New metric type: Object (#2489)
- BREAKING CHANGE: Support pings without {client|ping}_info sections (#2756)
Android
- Upgrade Android NDK to r26c (#2745)

v57.0.0 (2024-02-12)

Full changelog

General
- Added an experimental event listener API (#2719)
Android
- BREAKING CHANGE: Update JNA to version 5.14.0. Projects using older JNA releases may encounter errors until they update. (#2727)
- Set the target Android SDK to version 34 (#2709)
- Fixed an incorrectly named method. The method is now correctly named setExperimentationId.
- Update to Gradle v8.6 (#2721/#2731)

v56.1.0 (2024-01-16)

Full changelog

General
- Errors are now recorded in cases where we had to create a new data store for Glean due to a failure (bug 1815253)
- Update glean_parser to v11.0.0 (release notes)
- Event metrics can now record a maximum of 50 keys in the event extra object (Bug 1869429)
iOS
- Glean for iOS is now being built with Xcode 15.1 (#2669)
Android
- Replaced whenTaskAdded with configureEach in GleanGradlePlugin to avoid unnecessary configuration. (#2697)

v56.0.0 (2023-11-30)

Full changelog

General
- Updated to UniFFI 0.25.2 (#2678)
iOS
- Dropped support for iOS < 15 (#2681)

v55.0.0 (2023-10-23)

Python
- BREAKING CHANGE: Dropped support for Python 3.7 (#)

Full changelog

General
- BREAKING CHANGE: Adding 0 to a counter or labeled_counter metric will be silently ignored instead of raising an invalid_value error (bug 1762859)
- Trigger the uploader thread after scanning the pending pings directory (bug 1847950)
- Extend start/stop time of a ping to millisecond precision. Custom pings can opt-out using precise_timestamps: false (#2456)
- Update glean_parser to v10.0.0. Disallow unit field for anything but quantity, disallows ping lifetime metrics on the events ping, allows to configure precise timestamps in pings (release notes)
- Add an API to set an Experimentation ID that will be annotated to all pings (Bug 1848201)

v54.0.0 (2023-09-12)

Full changelog

General
- Experimental: Add configuration to add a wall clock timestamp to all events (#2513)
Python
- Switched the build system to maturin. This should not have any effect on consumers. (#2345)
- BREAKING CHANGE: Dropped support for Python 3.6 (#2345)
Kotlin
- Update to Gradle v8.2.1 (#2516)
- Increase Android compile SDK to version 34 (#2614)

v53.2.0 (2023-08-02)

Full changelog

General
- Update glean_parser to v8.1.0. Subsequently, metric names now have a larger limit of 70 characters (release notes)
Rust
- The Ping Rate Limit type is now accessible in the Rust Language Binding (#2528)
- Gracefully handle a failure when starting the upload thread. Glean no longer crashes in that case. (#2545)
- locale now exposed through the RLB so it can be set by consumers (#2531)
Python
- Added the shutdown API for Python to ensure orderly shutdown and waiting for uploader processes (#2538)
Kotlin
- Move running of upload task when Glean is running in a background service to use the internal Glean Dispatchers rather than WorkManager. Bug 1844533

v53.1.0 (2023-06-28)

Full changelog

General
- Gracefully handle the waiting thread going away during shutdown (#2503)
- Updated to UniFFI 0.24.1 (#2510)
- Try blocking shutdown 10s for init to complete (#2518)
Android
- Update minimum supported Java byte code generation to 17 (#2498)

v53.0.0 (2023-06-07)

Full changelog

General
- Adds the capability to merge remote metric configurations, enabling multiple Nimbus Features or components to share this functionality (Bug 1833381)
- StringList metric type limits have been increased. The length of strings allowed has been increased from 50 to 100 to match the String metric type, and the list length has been increased from 20 to 100 (Bug 1833870)
- Make ping rate limiting configurable on Glean init. (bug 1647630)
Rust
- Timing distribution traits now expose accumulate_samples and accumulate_raw_samples_nanos. This is a breaking change for consumers that make use of the trait as they will need to implement the new functions (Bug 1829745)
iOS
- Make debugging APIs available on Swift (#2470)
- Added a shutdown API for Swift. This should only be necessary for when Glean is running in a process other than the main process (like in the VPN daemon, for instance)(Bug 1832324)
- Glean for iOS is now being built with Xcode 14.3 (#2253)

v52.7.0 (2023-05-10)

Full changelog

General
- Allow user to configure how verbose the internal logging is (#2459)
- Added a timeout waiting for the dispatcher at shutdown (#2461)
- Added a new Glean metric glean.validation.shutdown_dispatcher_wait measuring the wait time at shutdown (#2461)
Kotlin
- Update Kotlin to version 1.8.21 (#2462)
- Make debugging APIs available on Android (Bug 1830937)

v52.6.0 (2023-04-20)

Full changelog

Rust
- The Text metric type is now available in the Rust language bindings (#2451)

v52.5.0 (2023-04-11)

Full changelog

General
- On Rkv detecting a corrupted database delete the old RKV, create a new one and log the error (#2425)
- Add the Date header as late as possible before the uploader acts (#2436)
- The logic of the Server Knobs API has been flipped. Instead of applying a list of metrics and their disabled state, the API now accepts a list of metrics and their enabled state (bug 1811253)
Kotlin
- Adds the ability to record metrics on a non-main process. This is enabled by setting a dataPath in the Glean configuration (bug 1815233)
iOS
- Adds the ability to record metrics on a non-main process. This is enabled by setting a dataPath in the Glean configuration (bug 1815233)

v52.4.3 (2023-03-24)

Full changelog

General
- Expose Server Knobs functionality via UniFFI for use on mobile
iOS
- BUGFIX: Prevent another test-only issue: The storage going away when the uploader reports back its status (#2430)

v52.4.2 (2023-03-15)

Full changelog

Rust
- Revert to libstd's remove_dir_all instead of external crate (#2415)
Python
- BUGFIX: Implement an empty shutdown function (#2417)

v52.4.1 (2023-03-10)

Full changelog

General
- Update tempfile crate to remove dependency on potentially vulnerable version of remove_dir_all@0.5.3

v52.4.0 (2023-03-09)

Full changelog

General
- Update glean_parser to v7.1.0 (release notes)
Kotlin
- Upgrade Android NDK to r25c (#2399)
iOS
- BUGFIX: Reworking the HTTP uploader to avoid background uploading issues (Bug 1819161)

v52.3.1 (2023-03-01)

Full changelog

General
- No functional change from v52.3.0, just CI updates.

v52.3.0 (2023-02-23)

Full changelog

General
- Loosen label restrictions to "at most 71 characters of printable ASCII" (bug 1672273)
- Introduced 2 new Glean health metrics: glean.upload.send_failure and glean.upload.send_success to measure the time for sending a ping (#2365)
- Introduced a new Glean metric: glean.validation.shutdown_wait to measure the time Glean waits for the uploader on shutdown (#2365)
Rust
- On shutdown wait up to 30s on the uploader to finish work (#2232)
iOS
- BUGFIX: Avoid an invalid state (double-starting) for baseline.duration when Glean is first initialized (#2368)

v52.2.0 (2023-01-30)

Full changelog

General
- Update to UniFFI 0.23 (#2338)

v52.1.1 (2023-01-26)

Full changelog

General
- BUGFIX: Properly invoke the windows build number function from whatsys (bug 1812672)

v52.1.0 (2023-01-26)

Full changelog

General
- BUGFIX: Custom Pings with events should no longer erroneously post InvalidState errors (bug 1811872)
- Upgrade to glean_parser v7.0.0 (#2346)
Kotlin
- Update to Gradle v7.6 (#2317)
Rust
- Added a new client_info field windows_build_number (Windows only) (#2325)
- A new ConfigurationBuilder allows to create the Glean configuration before initialization (#2313)
- Drop dependency on env_logger for regular builds (#2312)

v52.0.1 (2023-01-19)

Full changelog

Android
- The GleanDebugActivity can run without Glean being initialized (#2336)
Python
- Ship universal2 (aarch64 + x86_64 in one) wheels (#2340)

v52.0.0 (2022-12-13)

Full changelog

General
- Remove the metric glean.validation.first_run_hour. Note that this will mean no reason=upgrade metrics pings from freshly installed clients anymore. (#2271)
- BEHAVIOUR CHANGE: Events in Custom Pings no longer trigger their submission. (bug 1716725)
  - Custom Pings with unsent events will no longer be sent at startup with reason startup.
  - glean.restarted events will be included in Custom Pings with other events to rationalize event timestamps across restarts.
- test_reset_glean will remove all previous data if asked to clear stores, even if Glean never has been initialized (#2294)
- Upgrade to glean_parser v6.5.0, with support for Cow in Rust code (#2300)
- API REMOVED: The deprecated-since-v38 event metric record(map) API has been removed (bug 1802550)
- BEHAVIOUR CHANGE: "events" pings will no longer be sent if they have metrics but no events (bug 1803513)
- Experimental: Add functionality necessary to remotely configure the metric disabled property (bug 1798919)
  - This change has no effect when the API is not used and is transparent to consumers. The API is currently experimental because it is not stable and may change.
Rust
- Static labels for labeled metrics are now Cow<'static, str> to reduce heap allocations (#2272)
- NEW INTERNAL CONFIGURATION OPTION: trim_data_to_registered_pings will trim event storage to just the registered pings. Consult with the Glean Team before using. (bug 1804915)

v51.8.3 (2022-11-25)

Full changelog

General
- Upgrade to rkv 0.18.3. This comes with a bug fix that ensures that interrupted database writes don't corrupt/truncate the database file (#2288)
iOS
- Avoid building a dynamic library (#2285). Note: v51.8.1 and 51.8.2 are not working on iOS and will break the build due to accidentally including a link to a dynamic library.

v51.8.2 (2022-11-17)

Full changelog

General
- BUGFIX: Reliably clear pending pings and events on Windows using remove_dir_all crate (bug 1801128)
- Update to rkv v0.18.2 (#2270)

v51.8.1 (2022-11-15)

Full changelog

General
- Do not serialize count field in distribution payload (#2267)
- BUGFIX: The glean-core "metrics" ping scheduler will now schedule and send "upgrade"-reason pings. (bug 1800646)

v51.8.0 (2022-11-03)

Full changelog

General
- Upgrade to glean_parser v6.3.0, increases the event extra limit to 15 (#2255)
- Increase event extras value limit to 500 bytes (#2255)
Kotlin
- Increase to Android target/compile SDK version 33 (#2246)
iOS
- Try to avoid a crash by not invalidating upload sessions (#2254)

v51.7.0 (2022-10-25)

Full changelog

iOS
- Glean for iOS is now being built with Xcode 13.4 again (#2242)
Rust
- Add cargo feature preinit_million_queue to up the preinit queue length from 10^3 to 10^6 (bug 1796258)

v51.6.0 (2022-10-24)

Full changelog

General
- The internal glean-core dispatch queue changed from bounded to unbounded, while still behaving as a bounded queue.
iOS
- BUGFIX: Additional work to address an iOS crash due to an invalidated session (#2235)

v51.5.0 (2022-10-18)

Full changelog

General
- Add count to DistributionData payload (#2196)
- Update to UniFFI 0.21.0 (#2229)
Android
- Synchronize AndroidX dependencies with AC (#2219)
- Bump jna to 5.12.1 #2221 (#2221)
iOS
- Glean for iOS is now being built with Xcode 14.0 (#2188)

v51.4.0 (2022-10-04)

Full changelog

Kotlin
- Update Kotlin and Android Gradle Plugin to the latest releases (#2211)
Swift
- Fix for iOS startup crash caused by Glean (#2206)

v51.3.0 (2022-09-28)

Full changelog

General
- Update URL metric character limit to 8k to support longer URLs. URLs that are too long now are truncated to MAX_URL_LENGTH and still recorded along with an Overflow error. (#2199)
Kotlin
- Gradle plugin: Fix quoting issue in Python wrapper code (#2193)
- Bumped the required Android NDK to version 25.1.8937393 (#2195)

v51.2.0 (2022-09-08)

Full changelog

General
- Relax glean_parser version requirement. All "compatible releases" are now allowed (#2086)
- Uploaders can now signal that they can't upload anymore (#2136)
- Update UniFFI to version 0.19.6 (#2175)
Kotlin
- BUGFIX: Re-enable correctly collecting glean.validation.foreground_count again (#2153)
- BUGFIX: Gradle plugin: Correctly remove the version conflict check. Now the consuming module need to ensure it uses a single version across all dependencies (#2155)
- Upgrade dependencies and increase to Android target/compile SDK version 32 (#2150)
- Upgrade Android NDK to r25 (#2159)
- BUGFIX: Correctly set os_version and architecture again (#2174)
iOS
- BUGFIX: Correctly set os_version and architecture again (#2174)
Python
- BUGFIX: Correctly handle every string that represents a UUID, including non-hyphenated random 32-character strings (#2182)

v51.1.0 (2022-08-08)

Full changelog

General
- BUGFIX: Handle that Glean might be uninitialized when an upload task is requested (#2131)
- Updated the glean_parser to version 6.1.2
Kotlin
- BUGFIX: When setting a local endpoint in testing check for testing mode, not initialization (#2145)
- Gradle plugin: Remove the version conflict check. Now the consuming module need to ensure it uses a single version across all dependencies (#2143)

v51.0.1 (2022-07-26)

Full changelog

General
- BUGFIX: Set the following client_info fields correctly again: android_sdk_version, device_manufacturer, device_model, locale. These were never set in Glean v50.0.0 to v51.0.0 (#2131)

v51.0.0 (2022-07-22)

Full changelog

General
- Remove testHasValue from all implementations. testGetValue always returns a null value (null, nil, None depending on the language) and does not throw an exception (#2087).
- BREAKING CHANGE: Dropped ping_name argument from all test_get_num_recorded_errors methods (#2088)
  Errors default to the metrics ping, so that's what is queried internally.
- BREAKING: Disable safe-mode everywhere. This causes all clients to migrate from LMDB to safe-mode storage (#2123)
Kotlin
- Fix the Glean Gradle Plugin to work with Android Gradle Plugin v7.2.1 (#2114)
Rust
- Add a method to construct an Event with runtime-known allowed extra keys. (bug 1767037)

v50.1.4 (2022-08-01)

Full changelog

General
- BUGFIX: Handle that Glean might be uninitialized when an upload task is requested (#2131)

v50.1.3 (2022-07-26)

Full changelog

General
- BUGFIX: Set the following client_info fields correctly again: android_sdk_version, device_manufacturer, device_model, locale. These were never set in Glean v50.0.0 to v51.0.0 (#2131)

v50.1.2 (2022-07-08)

Full changelog

General
- Update UniFFI to version 0.19.3
- Fix rust-beta-tests linting

v50.1.1 (2022-06-17)

Full changelog

Kotlin
- Fix bug in Glean Gradle plugin by using correct quoting in embedded Python script (#2097)
- Fix bug in Glean Gradle plugin by removing references to Linux paths (#2098)

v50.1.0 (2022-06-15)

Full changelog

General
- Updated to glean_parser v6.1.1 (#2092)
Swift
- Dropped usage of Carthage for internal dependencies (#2089)
- Implement the text metric (#2073)
Kotlin
- Implement the text metric (#2073)
Rust
- Derive serde::{Deserialize, Serialize} on Lifetime and CommonMetricData (bug 1772156)

v50.0.1 (2022-05-25)

Full changelog

General
- Updated to glean_parser v6.0.1
Python
- Remove duplicate log initialization and prevent crash (#2064)

v50.0.0 (2022-05-20)

Full changelog

This release is a major refactoring of the internals and contains several breaking changes to exposed APIs. Exposed functionality should be unaffected. See below for details.

General
- Switch to UniFFI-defined and -generated APIs for all 3 foreign-language SDKs
- The task dispatcher has been moved to Rust for all foreign-language SDKs
- Updated to glean_parser v6.0.0
Swift
- testGetValue on all metric types now returns nil when no data is recorded instead of throwing an exception.
- testGetValue on metrics with more complex data now return new objects for inspection. See the respective documentation for details.
- testHasValue on all metric types is deprecated. It is currently still available as extension methods. Use testGetValue with not-null checks.
Kotlin
- testGetValue on all metric types now returns null when no data is recorded instead of throwing an exception.
- testGetValue on metrics with more complex data now return new objects for inspection. See the respective documentation for details.
- testHasValue on all metric types is deprecated. It is currently still available as extension methods and thus require an additional import. Use testGetValue with not-null checks.
- On TimingDistributionMetric, CustomDistributionMetric, MemoryDistributionMetric the accumulateSamples method now takes a List<Long> instead of LongArray. Use listOf instead of longArrayOf or call .toList
TimingDistributionMetricType.start now always returns a valid TimerId, TimingDistributionMetricType.stopAndAccumulate always requires a TimerId.
Python
- test_get_value on all metric types now returns None when no data is recorded instead of throwing an exception.
- test_has_value on all metric types was removed. Use test_get_value with not-null checks.

v44.2.0 (2022-05-16)

Full changelog

General
- The glean.error.preinit_tasks_overflow metric now reports only the number of overflowing tasks. It is marked as version 1 in the definition now. (#2026)
Kotlin
- (Development only) Allow to override the used glean_parser in the Glean Gradle Plugin (#2029)
- setSourceTags is now a public API (#2035))
iOS
- setSourceTags is now a public API (#2035)
Rust
- Implemented try_get_num_recorded_errors for Boolean in Rust Language Bindings (#2049)

v44.1.1 (2022-04-14)

Full changelog

Rust
- Raise the global dispatcher queue limit from 100 to 1000 tasks. (bug 1764549)
iOS
- Enable expiry by version in the sdk_generator.sh script (#2013)

v44.1.0 (2022-04-06)

Full changelog

Android
- The glean-native-forUnitTests now ships with separate libraries for macOS x86_64 and macOS aarch64 (#1967)
Rust
- Glean will no longer overwrite the User-Agent header, but instead send that information as X-Telemetry-Agent (bug 1711928)

v44.0.0 (2022-02-09)

General
- BREAKING CHANGE: Updated glean_parser version to 5.0.1 (#1852). This update drops support for generating C# specific metrics API.
Rust
- Ensure test-only destroy_glean() handles initialize() having started but not completed (bug 1750235)
Swift
- Dropping support of the Carthage-compatible framework archive (#1943). The Swift Package (https://github.com/mozilla/glean-swift) is the recommended way of consuming Glean iOS.
Python
- BUGFIX: Datetime metrics now correctly record the local timezone (#1953).

Full changelog

v43.0.2 (2022-01-17)

Full changelog

General
- Fix artifact publishing properly (#1930)

v43.0.1 (2022-01-17)

Full changelog

General
- Fix artifact publishing (#1930)

v43.0.0 (2022-01-17)

Full changelog

General
- Removed invalid_timezone_offset metric (#1923)
Python
- It is now possible to emit log messages from the networking subprocess by using the new log_level parameter to Glean.initialize. (#1918)
Kotlin
- Automatically pass build date as part of the build info (#1917)
iOS
- BREAKING CHANGE: Pass build info into initialize, which contains the build date (#1917). A suitable instance is generated by glean_parser in GleanMetrics.GleanBuild.info.

v42.3.2 (2021-12-15)

Full changelog

Python
- Reuse existing environment when launching subprocess (#1908)

v42.3.1 (2021-12-07)

Full changelog

iOS
- Fix Carthage archive release (#1891)

v42.3.0 (2021-12-07)

Full changelog

Rust
- BUGFIX: Correct category & name for preinit_tasks_overflow metric. Previously it would have been wrongly recorded as preinit_tasks_overflow.glean.error (#1887)
- BUGFIX: Fix to name given to the events ping when instantiated (#1885)
iOS
- BUGFIX: Make fields of RecordedEventData publicly accessible (#1867)
- Skip code generation in indexbuild build (#1889)
Python
- Don't let environment affect subprocess module search path (#1542)

v42.2.0 (2021-11-03)

Full changelog

General
- Updated glean_parser version to 4.3.1 (#1852)
Android
- Automatic detection of tags.yaml files (#1852)

v42.1.0 (2021-10-18)

Full changelog

Rust
- Backwards-compatible API Change: Make experiment test APIs public. (#1834)

v42.0.1 (2021-10-11)

Full changelog

General
- BUGFIX: Avoid a crash when accessing labeled metrics by caching created objects (#1823).
Python
- Glean now officially supports Python 3.10 (#1818)

v42.0.0 (2021-10-06)

Full changelog

Android
- Updated to Gradle 7, Android Gradle Plugin 7 and Rust Android Plugin 0.9 as well as building with Java 11 (#1801)
iOS
- Add support for the URL metric type (#1791)
- Remove reliance on Operation for uploading and instead use the background capabilities of URLSession (#1783)
- Glean for iOS is now being built with Xcode 13.0.0 (#1802).
Rust
- BUGFIX: No panic if trying to flush ping-lifetime data after shutdown (#1800)
- BREAKING CHANGE: glean::persist_ping_lifetime_data is now async (#1812)

v41.1.1 (2021-09-29)

Full changelog

Android
- BUGFIX: Limit logging to Glean crates (#1808)

v41.1.0 (2021-09-16)

Full changelog

Rust
- BUGFIX: Ensure RLB persists ping lifetime data on shutdown (#1793)
- Expose persist_ping_lifetime_data in the RLB. Consumers can call this to persist data at convenient times, data is also persisted on shutdown (#1793)

v41.0.0 (2021-09-13)

Full changelog

General
- BUGFIX: Only clear specified storage in delayed ping io mode (#1782)
- Require Rust >= 1.53.0 (#1782)
Android
- Glean.initialize now requires a buildInfo parameter to pass in build time version information. A suitable instance is generated by glean_parser in ${PACKAGE_ROOT}.GleanMetrics.GleanBuildInfo.buildInfo. Support for not passing in a buildInfo object has been removed. (#1752)

v40.2.0 (2021-09-08)

Full changelog

General
- Updated glean_parser version to 4.0.0
Android
- Add support for the URL metric type (#1778)
Rust
- Add support for the URL metric type (#1778)
Python
- Add support for the URL metric type (#1778)

v40.1.1 (2021-09-02)

Full changelog

iOS
- Use 'Unknown' value if system data can't be decoded as UTF-8 (#1769)
- BUGFIX: Add quantity metric type to the build (#1774). Previous builds are unable to use quantity metrics

v40.1.0 (2021-08-25)

Full changelog

Android
- Updated to Kotlin 1.5, Android Gradle Plugin 4.2.2 and Gradle 6.7.1 (#1747)
- The glean-gradle-plugin now forces a compile failure when multiple Glean versions are detected in the build (#1756)
- The glean-gradle-plugin does not enable a glean-native capability on GeckoView anymore. That will be done by GeckoView directly (#1759)

v40.0.0 (2021-07-28)

Full changelog

Android
- Breaking Change: Split the Glean Kotlin SDK into two packages: glean and glean-native (#1595). Consumers will need to switch to org.mozilla.telemetry:glean-native-forUnitTests. Old code in build.gradle:
```
testImplementation "org.mozilla.telemetry:glean-forUnitTests:${project.ext.glean_version}"
```
  New code in build.gradle:
```
testImplementation "org.mozilla.telemetry:glean-native-forUnitTests:${project.ext.glean_version}"
```
- The glean-gradle-plugin now automatically excludes the glean-native dependency if geckoview-omni is also part of the build. Glean native functionality will be provided by the geckoview-omni package.
Rust
- The glean-ffi is no longer compiled as a cdylib. Other language SDKs consume glean-bundle instead as a cdylib. This doesn't affect consumers.

v39.1.0 (2021-07-26)

Full changelog

General
- Updated glean_parser version to 3.6.0
- Allow Custom Distribution metric type on all platforms (#1679)

v39.0.4 (2021-07-26)

Full changelog

General
- Extend invalid_timezone_offset metric until the end of the year (#1697)

v39.0.3 (2021-06-09)

Full changelog

Android
- Unbreak Event#record API by accepting null on the deprecated API. The previous 39.0.0 release introduced the new API, but accidentally broke certain callers that just forward arguments. This restores passing null (or nothing) when using the old API. It remains deprecated.

v39.0.2 (2021-06-07)

Full changelog

iOS
- Fix iOS release build (#1668, #1669)

v39.0.1 (2021-06-04)

Full changelog

iOS
- Build and release Glean as an xcframework (#1663) This will now also auto-update the Glean package at https://github.com/mozilla/glean-swift.

v39.0.0 (2021-05-31)

Full changelog

General
- Add new event extras API to all implementations. See below for details (#1603)
- Updated glean_parser version to 3.4.0 (#1603)

Rust

Breaking Change: Allow event extras to be passed as an object. This replaces the old HashMap-based API. Values default to string. See the event documentation for details. (#1603) Old code:

let mut extra = HashMap::new();
extra.insert(SomeExtra::Key1, "1".into());
extra.insert(SomeExtra::Key2, "2".into());
metric.record(extra);

New code:

let extra = SomeExtra {
    key1: Some("1".into()),
    key2: Some("2".into()),
};
metric.record(extra);

Android
- Deprecation: The old event recording API is replaced by a new one, accepting a typed object (#1603). See the event documentation for details.
- Skip build info generation for libraries (#1654)
Python
- Deprecation: The old event recording API is replaced by a new one, accepting a typed object (#1603). See the event documentation for details.
Swift
- Deprecation: The old event recording API is replaced by a new one, accepting a typed object (#1603). See the event documentation for details.

v38.0.1 (2021-05-17)

Full changelog

General
- BUGFIX: Invert the lock order in glean-core's metrics ping scheduler (#1637)

v38.0.0 (2021-05-12)

Full changelog

General
- Update documentation to recommend using Glean Dictionary instead of metrics.md (#1604)
Rust
- Breaking Change: Don't return a result from submit_ping. The boolean return value indicates whether a ping was submitted (#1613)
- Breaking Change: Glean now schedules "metrics" pings, accepting a new Configuration parameter. (#1599)
- Dispatch setting the source tag to avoid a potential crash (#1614)
- Testing mode will wait for init & upload tasks to finish (#1628)
Android
- Set required fields for client_info before optional ones (#1633)
- Provide forward-compatibility with Gradle 6.8 (#1616)

v37.0.0 (2021-04-30)

Full changelog

General
- Breaking Change: "deletion-request" pings now include the reason upload was disabled: at_init (Glean detected a change between runs) or set_upload_enabled (Glean was told of a change as it happened). (#1593).
- Attempt to upload a ping even in the face of IO Errors (#1576).
- Implement an additional check to avoid crash due to faulty timezone offset (#1581)
  - This now records a new metric glean.time.invalid_timezone_offset, counting how often we failed to get a valid timezone offset.
- Use proper paths throughout to hopefully handle non-UTF-8 paths more gracefully (#1596)
- Updated glean_parser version to 3.2.0 (#1609)
iOS
- Code generator: Ensure at least pip 20.3 is available in iOS build (#1590)

v36.0.1 (2021-04-09)

Full changelog

RLB
- Provide an internal-use-only API to pass in raw samples for timing distributions (#1561).
- Expose Timespan's set_raw to Rust (#1578).
Android
- BUGFIX: TimespanMetricType.measure and TimingDistributionMetricType.measure won't get inlined anymore (#1560). This avoids a potential bug where a return used inside the closure would end up not measuring the time. Use return@measure <val> for early returns.
Python
- The Glean Python bindings now use rkv's safe mode backend. This should avoid intermittent segfaults in the LMDB backend.

v36.0.0 (2021-03-16)

Full changelog

General
- Introduce a new API Ping#test_before_next_submit to run a callback right before a custom ping is submitted (#1507).
  - The new API exists for all language bindings (Kotlin, Swift, Rust, Python).
- Updated glean_parser version to 2.5.0
- Change the fmt- and lint- make commands for consistency (#1526)
- The Glean SDK can now produce testing coverage reports for your metrics (#1482).
Python
- Update minimal required version of cffi dependency to 1.13.0 (#1520).
- Ship wheels for arm64 macOS (#1534).
RLB
- Added rate metric type (#1516).
- Set internal_metrics::os_version for MacOS, Windows and Linux (#1538)
- Expose a function get_timestamp_ms to get a timestamp from a monotonic clock on all supported operating systems, to be used for event timestamps (#1546).
- Expose a function to record events with an externally provided timestamp.
iOS
- Breaking Change: Event timestamps are now correctly recorded in milliseconds (#1546).
  - Since the first release event timestamps were erroneously recorded with nanosecond precision (#1549). This is now fixed and event timestamps are in milliseconds. This is equivalent to how it works in all other language bindings.

v35.0.0 (2021-02-22)

Full changelog

Android
- Glean.initialize can now take a buildInfo parameter to pass in build time version information, and avoid calling out to the Android package manager at runtime. A suitable instance is generated by glean_parser in ${PACKAGE_ROOT}.GleanMetrics.GleanBuildInfo.buildInfo (#1495). Not passing in a buildInfo object is still supported, but is deprecated.
- The testGetValue APIs now include a message on the NullPointerException thrown when the value is missing.
- Breaking change: LEGACY_TAG_PINGS is removed from GleanDebugActivity (#1510)
RLB
- Breaking change: Configuration.data_path is now a std::path::PathBuf(#1493).

v34.1.0 (2021-02-04)

Full changelog

General
- A new metric glean.validation.pings_submitted tracks the number of pings sent. It is included in both the metrics and baseline pings.
iOS
- The metric glean.validation.foreground_count is now sent in the metrics ping (#1472).
- BUGFIX: baseline pings with reason dirty_startup are no longer sent if Glean did not full initialize in the previous run (#1476).
Python
- Expose the client activity API (#1481).
- BUGFIX: Publish a macOS wheel again. The previous release failed to build a Python wheel for macOS platforms (#1471).
RLB
- BUGFIX: baseline pings with reason dirty_startup are no longer sent if Glean did shutdown cleanly (#1483).

v34.0.0 (2021-01-29)

Full changelog

General
- Other bindings detect when RLB is used and try to flush the RLB dispatcher to unblock the Rust API (#1442).
  - This is detected automatically, no changes needed for consuming code.
- Add support for the client activity API (#1455). This API is either automatically used or exposed by the language bindings.
- Rename the reason background to inactive for both the baseline and events ping. Rename the reason foreground to active for the baseline ping.
RLB
- When the pre-init task queue overruns, this is now recorded in the metric glean.error.preinit_tasks_overflow (#1438).
- Expose the client activity API (#1455).
- Send the baseline ping with reason dirty_startup, if needed, at startup.
- Expose all required types directly (#1452).
  - Rust consumers will not need to depend on glean-core anymore.
Android
- BUGFIX: Don't crash the ping uploader when throttled due to reading too large wait time values (#1454).
- Use the client activity API (#1455).
- Update AndroidX dependencies (#1441).
iOS
- Use the client activity API (#1465). Note: this now introduces a baseline ping with reason active on startup.

v33.10.3 (2021-01-18)

Full changelog

Rust
- Upgrade rkv to 0.17 (#1434)

v33.10.2 (2021-01-15)

Full changelog

General:
- A new metric glean.error.io has been added, counting the times an IO error happens when writing a pending ping to disk (#1428)
Android
- A new metric glean.validation.foreground_count was added to the metrics ping (#1418).
Rust
- BUGFIX: Fix lock order inversion in RLB Timing Distribution (#1431).
- Use RLB types instead of glean-core ones for RLB core metrics. (#1432).

v33.10.1 (2021-01-06)

Full changelog

No functional changes. v33.10.0 failed to generated iOS artifacts due to broken tests (#1421).

v33.10.0 (2021-01-06)

Full changelog

General
- A new metric glean.validation.first_run_hour, analogous to the existing first_run_date but with hour resolution, has been added. Only clients running the app for the first time after this change will report this metric (#1403).
Rust
- BUGFIX: Don't require mutable references in RLB traits (#1417).
Python
- Building the Python package from source now works on musl-based Linux distributions, such as Alpine Linux (#1416).

v33.9.1 (2020-12-17)

Full changelog

Rust
- BUGFIX: Don't panic on shutdown and avoid running tasks if uninitialized (#1398).
- BUGFIX: Don't fail on empty database files (#1398).
- BUGFIX: Support ping registration before Glean initializes (#1393).

v33.9.0 (2020-12-15)

Full changelog

Rust
- Introduce the String List metric type in the RLB. (#1380).
- Introduce the Datetime metric type in the RLB (#1384).
- Introduce the CustomDistribution and TimingDistribution metric type in the RLB (#1394).

v33.8.0 (2020-12-10)

Full changelog

Rust
- Introduce the Memory Distribution metric type in the RLB. (#1376).
- Shut down Glean in tests before resetting to make sure they don't mistakenly init Glean twice in parallel (#1375).
- BUGFIX: Fixing 2 lock-order-inversion bugs found by TSan (#1378).
  - TSan runs on mozilla-central tests, which found two (potential) bugs where 2 different locks were acquired in opposite order in different code paths, which could lead to deadlocks in multi-threaded code. As RLB uses multiple threads (e.g. for init and the dispatcher) by default, this can easily become an actual issue.
Python
- All log messages from the Glean SDK are now on the glean logger, obtainable through logging.getLogger("glean"). (Prior to this, each module had its own logger, for example glean.net.ping_upload_worker).

v33.7.0 (2020-12-07)

Full changelog

Rust
- Upgrade rkv to 0.16.0 (no functional changes) (#1355).
- Introduce the Event metric type in the RLB (#1361).
Python
- Python Linux wheels no longer work on Linux distributions released before 2014 (they now use the manylinux2014 ABI) (#1353).
- Unbreak Python on non-Linux ELF platforms (BSD, Solaris/illumos) (#1363).

v33.6.0 (2020-12-02)

Full changelog

Rust
- BUGFIX: Negative timespans for the timespan metric now correctly record an InvalidValue error (#1347).
- Introduce the Timespan metric type in the RLB (#1347).
Python
- BUGFIX: Network slowness or errors will no longer block the main dispatcher thread, leaving work undone on shutdown (#1350).
- BUGFIX: Lower sleep time on upload waits to avoid being stuck when the main process ends (#1349).

v33.5.0 (2020-12-01)

Full changelog

Rust
- Introduce the UUID metric type in the RLB.
- Introduce the Labeled metric type in the RLB (#1327).
- Introduce the Quantity metric type in the RLB.
- Introduce the shutdown API.
- Add Glean debugging APIs.
Python
- BUGFIX: Setting a UUID metric to a value that is not in the expected UUID format will now record an error with the Glean error reporting system.

v33.4.0 (2020-11-17)

Full changelog

General
- When Rkv's safe mode is enabled (features = ["rkv-safe-mode"] on the glean-core crate) LMDB data is migrated at first start (#1322).
Rust
- Introduce the Counter metric type in the RLB.
- Introduce the String metric type in the RLB.
- BUGFIX: Track the size of the database directory at startup (#1304).
Python
- BUGFIX: Fix too-long sleep time in uploader due to unit mismatch (#1325).
Swift
- BUGFIX: Fix too-long sleep time in uploader due to unit mismatch (#1325).

v33.3.0 (2020-11-12)

Full changelog

General
- Do not require default-features on rkv and downgrade bincode (#1317)
- Do not require default-features on rkv and downgrade bincode (#1317)
Rust
- Implement the experiments API (#1314)

v33.2.0 (2020-11-10)

Full changelog

Python
- Fix building of Linux wheels (#1303)
  - Python Linux wheels no longer work on Linux distributions released before 2010. (They now use the manylinux2010 ABI, rather than the manylinux1 ABI.)
Rust
- Introduce the RLB net module (#1292)

v33.1.2 (2020-11-04)

Full changelog

No changes. v33.1.1 was tagged incorrectly.

v33.1.1 (2020-11-04)

Full changelog

No changes. v33.1.0 was tagged incorrectly.

v33.1.0 (2020-11-04)

Full changelog

General
- Standardize throttle backoff time throughout all bindings. (#1240)
- Update glean_parser to 1.29.0
  - Generated code now includes a comment next to each metric containing the name of the metric in its original snake_case form.
- Expose the description of the metric types in glean_core using traits.
Rust
- Add the BooleanMetric type.
- Add the dispatcher module (copied over from mozilla-central).
- Allow consumers to specify a custom uploader.
Android
- Update the JNA dependency from 5.2.0 to 5.6.0
- The glean-gradle-plugin now makes sure that only a single Miniconda installation will happen at the same time to avoid a race condition when multiple components within the same project are using Glean.

v33.0.4 (2020-09-28)

Full changelog

Note: Previous 33.0.z releases were broken. This release now includes all changes from 33.0.0 to 33.0.3.

General
- Update glean_parser to 1.28.6
  - BUGFIX: Ensure Kotlin arguments are deterministically ordered
Android
- Breaking change: Updated to the Android Gradle Plugin v4.0.1 and Gradle 6.5.1. Projects using older versions of these components will need to update in order to use newer versions of the Glean SDK.
- Update the Kotlin Gradle Plugin to version 1.4.10.
- Fixed the building of .aar releases on Android so they include the Rust shared objects.

v33.0.3 (2020-09-25)

Full changelog

General
- v33.0.2 was tagged incorrectly. This release is just to correct that mistake.

v33.0.2 (2020-09-25)

Full changelog

Android
- Fixed the building of .aar releases on Android so they include the Rust shared objects.

v33.0.1 (2020-09-24)

Full changelog

General
- Update glean_parser to 1.28.6
  - BUGFIX: Ensure Kotlin arguments are deterministically ordered
Android
- Update the Kotlin Gradle Plugin to version 1.4.10.

v33.0.0 (2020-09-22)

Full changelog

Android
- Breaking change: Updated to the Android Gradle Plugin v4.0.1 and Gradle 6.5.1. Projects using older versions of these components will need to update in order to use newer versions of the Glean SDK.

v32.4.1 (2020-10-01)

Full changelog

General
- Update glean_parser to 1.28.6
  - BUGFIX: Ensure Kotlin arguments are deterministically ordered
- BUGFIX: Transform ping directory size from bytes to kilobytes before accumulating to glean.upload.pending_pings_directory_size (#1236).

v32.4.0 (2020-09-18)

Full changelog

General
- Allow using quantity metric type outside of Gecko (#1198)
- Update glean_parser to 1.28.5
  - The SUPERFLUOUS_NO_LINT warning has been removed from the glinter. It likely did more harm than good, and makes it hard to make metrics.yaml files that pass across different versions of glean_parser.
  - Expired metrics will now produce a linter warning, EXPIRED_METRIC.
  - Expiry dates that are more than 730 days (~2 years) in the future will produce a linter warning, EXPIRATION_DATE_TOO_FAR.
  - Allow using the Quantity metric type outside of Gecko.
  - New parser configs custom_is_expired and custom_validate_expires added. These are both functions that take the expires value of the metric and return a bool. (See Metric.is_expired and Metric.validate_expires). These will allow FOG to provide custom validation for its version-based expires values.
- Add a limit of 250 pending ping files. (#1217).
Android
- Don't retry the ping uploader when waiting, sleep instead. This avoids a never-ending increase of the backoff time (#1217).

v32.3.2 (2020-09-11)

Full changelog

General
- Track the size of the database file at startup (#1141).
- Submitting a ping with upload disabled no longer shows an error message (#1201).
- BUGFIX: scan the pending pings directories after dealing with upload status on initialization. This is important, because in case upload is disabled we delete any outstanding non-deletion ping file, and if we scan the pending pings folder before doing that we may end up sending pings that should have been discarded. (#1205)
iOS
- Disabled code coverage in release builds (#1195).
Python
- Glean now ships a source package to pip install on platforms where wheels aren't provided.

v32.3.1 (2020-09-09)

Full changelog

Python
- Fixed the release process to generate all wheels (#1193).

v32.3.0 (2020-08-27)

Full changelog

Android
- Handle ping registration off the main thread. This removes a potential blocking call (#1132).
iOS
- Handle ping registration off the main thread. This removes a potential blocking call (#1132).
- Glean for iOS is now being built with Xcode 12.0.0 (Beta 5) (#1170).

v32.2.0 (2020-08-25)

Full changelog

General
- Move logic to limit the number of retries on ping uploading "recoverable failures" to glean-core. (#1120)
  - The functionality to limit the number of retries in these cases was introduced to the Glean SDK in v31.1.0. The work done now was to move that logic to the glean-core in order to avoid code duplication throughout the language bindings.
- Update glean_parser to v1.28.3
  - BUGFIX: Generate valid C# code when using Labeled metric types.
  - BUGFIX: Support HashSet and Dictionary in the C# generated code.
- Add a 10MB quota to the pending pings storage. (#1100)
C#
- Add support for the String List metric type (#1108).
- Enable generating the C# APIs using the glean_parser (#1092).
- Add support for the EventMetricType in C# (#1129).
- Add support for the TimingDistributionMetricType in C# (#1131).
- Implement the experiments API in C# (#1145).
- This is the last release with C# language bindings changes. Reach out to the Glean SDK team if you want to use the C# bindings in a new product and require additional features.
Python
- BUGFIX: Limit the number of retries for 5xx server errors on ping uploads (#1120).
  - This kinds of failures yield a "recoverable error", which means the ping gets re-enqueued. That can cause infinite loops on the ping upload worker. For python we were incorrectly only limiting the number of retries for I/O errors, another type of "recoverable error".
- kebab-case ping names are now converted to snake_case so they are available on the object returned by load_pings (#1122).
- For performance reasons, the glinter is no longer run as part of glean.load_metrics(). We recommend running glinter as part of your project's continuous integration instead (#1124).
- A measure context manager for conveniently measuring runtimes has been added to TimespanMetricType and TimingDistributionMetricType (#1126).
- Networking errors have changed from ERROR level to DEBUG level so they aren't displayed by default (#1166).
iOS
- Changed logging to use OSLog rather than a mix of NSLog and print. (#1133)

v32.1.1 (2020-08-24)

Full changelog

Android
- Support installing glean_parser in offline mode (#1065).
- Fix a startup crash on some Android 8 (SDK=25) devices, due to a bug in the Java compiler (#1135).

v32.1.0 (2020-08-17)

Full changelog

General
- The upload rate limiter has been changed from 10 pings per minute to 15 pings per minute.

v32.0.0 (2020-08-03)

Full changelog

General
- Limit ping request body size to 1MB. (#1098)
iOS
- Implement ping tagging (i.e. the X-Source-Tags header) through custom URL (#1100).
C#
- Add support for Labeled Strings and Labeled Booleans.
- Add support for the Counter metric type and Labeled Counter.
- Add support for the MemoryDistributionMetricType.
Python
- Breaking change: data_dir must always be passed to Glean.initialize. Prior to this, a missing value would store Glean data in a temporary directory.
- Logging messages from the Rust core are now sent through Python's standard library logging module. Therefore all logging in a Python application can be controlled through the logging module interface.
Android
- BUGFIX: Require activities executed via GleanDebugView to be exported.

v31.6.0 (2020-07-24)

Full changelog

General
- Implement JWE metric type (#1073, #1062).
- DEPRECATION: getUploadEnabled is deprecated (respectively get_upload_enabled in Python) (#1046)
  - Due to Glean's asynchronous initialization the return value can be incorrect. Applications should not rely on Glean's internal state. Upload enabled status should be tracked by the application and communicated to Glean if it changes. Note: The method was removed from the C# and Python implementation.
- Update glean_parser to v1.28.1
  - The glean_parser linting was leading consumers astray by incorrectly suggesting that deletion-request be instead deletion_request when used for send_in_pings. This was causing metrics intended for the deletion-request ping to not be included when it was collected and submitted. Consumers that are sending metrics in the deletion-request ping will need to update the send_in_pings value in their metrics.yaml to correct this.
  - Fixes a bug in doc rendering.

v31.5.0 (2020-07-22)

Full changelog

General
- Implement ping tagging (i.e. the X-Source-Tags header) (#1074). Note that this is not yet implemented for iOS.
- String values that are too long now record invalid_overflow rather than invalid_value through the Glean error reporting mechanism. This affects the string, event and string list metrics.
- metrics.yaml files now support a data_sensitivity field to all metrics for specifying the type of data collected in the field.
Python
- The Python unit tests no longer send telemetry to the production telemetry endpoint.
- BUGFIX: If an application_version isn't provided to Glean.initialize, the client_info.app_display_version metric is set to "Unknown", rather than resulting in invalid pings.
Android
- Allow defining which Activity to run next when using the GleanDebugActivity.
iOS
- BUGFIX: The memory unit is now correctly set on the MemoryDistribution metric type in Swift in generated metrics code.
C#
- Metrics can now be generated from the metrics.yaml files.

v31.4.1 (2020-07-20)

Full changelog

General
- BUGFIX: fix int32 to ErrorType mapping. The InvalidOverflow had a value mismatch between glean-core and the bindings. This would only be a problem in unit tests. (#1063)
Android
- Enable propagating options to the main product Activity when using the GleanDebugActivity.
- BUGFIX: Fix the metrics ping collection for startup pings such as reason=upgrade to occur in the same thread/task as Glean initialize. Otherwise, it gets collected after the application lifetime metrics are cleared such as experiments that should be in the ping. (#1069)

v31.4.0 (2020-07-16)

Full changelog

General
- Enable debugging features through environment variables. (#1058)

v31.3.0 (2020-07-10)

Full changelog

General
- Remove locale from baseline ping. (1609968, #1016)
- Persist X-Debug-ID header on store ping. (1605097, #1042)
- BUGFIX: raise an error if Glean is initialized with an empty string as the application_id (#1043).
Python
- BUGFIX: correctly set the app_build metric to the newly provided application_build_id initialization option (#1031).
- The Python bindings now report networking errors in the glean.upload.ping_upload_failure metric (like all the other bindings) (#1039).
- Python default upgraded to Python 3.8 (#995)
iOS
- BUGFIX: Make LabeledMetric subscript public, so consuming applications can actually access it (#1027)

v31.2.3 (2020-06-29)

Full changelog

General
- Move debug view tag management to the Rust core. (1640575, #998)
- BUGFIX: Fix mismatch in events keys and values by using glean_parser version 1.23.0.

v31.2.2 (2020-06-26)

Full changelog

Android
- BUGFIX: Compile dependencies with NDEBUG to avoid linking unavailable symbols. This fixes a crash due to a missing stderr symbol on older Android (#1020)

v31.2.1 (2020-06-25)

Full changelog

Python
- BUGFIX: Core metrics are now present in every ping, even if submit is called before initialize has a chance to complete. (#1012)

v31.2.0 (2020-06-24)

Full changelog

General
- Add rate limiting capabilities to the upload manager. (1543612, #974)
Android
- BUGFIX: baseline pings with reason "dirty startup" are no longer sent if Glean did not full initialize in the previous run (#996).
Python
- Support for Python 3.5 was dropped (#987).
- Python wheels are now shipped with Glean release builds, resulting in much smaller libraries (#1002)
- The Python bindings now use locale.getdefaultlocale() rather than locale.getlocale() to determine the locale (#1004).

v31.1.2 (2020-06-23)

Full changelog

General
- BUGFIX: Correctly format the date and time in the Date header (#993).
Python
- BUGFIX: Additional time is taken at shutdown to make sure pings are sent and telemetry is recorded. (1646173, #983)
- BUGFIX: Glean will run on the main thread when running in a multiprocessing subprocess (#986).

v31.1.1 (2020-06-12)

Full changelog

Android
- Dropping the version requirement for lifecycle extensions down again. Upping the required version caused problems in A-C.

v31.1.0 (2020-06-11)

Full changelog

General:
- The regex crate is no longer required, making the Glean binary smaller (#949)
- Record upload failures into a new metric (#967)
- Log FFI errors as actual errors (#935)
- Limit the number of upload retries in all implementations (#953, #968)
Python
- Additional safety guarantees for applications that use Python threading (#962)

v31.0.2 (2020-05-29)

Full changelog

Rust
- Fix list of included files in published crates

v31.0.1 (2020-05-29)

Full changelog

Rust
- Relax version requirement for flate2 for compatibility reasons

v31.0.0 (2020-05-28)

Full changelog

General:
- The version of glean_parser has been upgraded to v1.22.0
  - A maximum of 10 extra_keys is now enforced for event metric types.
  - Breaking change: (Swift only) Combine all metrics and pings into a single generated file Metrics.swift.
    - For Swift users this requires to change the list of output files for the sdk_generator.sh script. It now only needs to include the single file Generated/Metrics.swift.
Python:
- BUGFIX: lifetime: application metrics are no longer recorded as lifetime: user.
- BUGFIX: glean-core is no longer crashing when calling uuid.set with invalid UUIDs.
- Refactor the ping uploader to use the new upload mechanism and add gzip compression.
- Most of the work in Glean.initialize happens on a worker thread and no longer blocks the main thread.
Rust:
- Expose Datetime types to Rust consumers.

v30.1.0 (2020-05-22)

Full changelog

Android & iOS
- Ping payloads are now compressed using gzip.
iOS
- Glean.initialize is now a no-op if called from an embedded extension. This means that Glean will only run in the base application process in order to prevent extensions from behaving like separate applications with different client ids from the base application. Applications are responsible for ensuring that extension metrics are only collected within the base application.
Python
- lifetime: application metrics are now cleared after the Glean-owned pings are sent, after the product starts.
- Glean Python bindings now build in a native Windows environment.
- BUGFIX: MemoryDistributionMetric now parses correctly in metrics.yaml files.
- BUGFIX: Glean will no longer crash if run as part of another library's coverage testing.

v30.0.0 (2020-05-13)

Full changelog

General:
- We completely replaced how the upload mechanism works. glean-core (the Rust part) now controls all upload and coordinates the platform side with its own internals. All language bindings implement ping uploading around a common API and protocol. There is no change for users of Glean, the language bindings for Android and iOS have been adopted to the new mechanism already.
- Expose RecordedEvent and DistributionData types to Rust consumers (#876)
- Log crate version at initialize (#873)
Android:
- Refactor the ping uploader to use the new upload mechanism.
iOS:
- Refactor the ping uploader to use the new upload mechanism.

v29.1.2 (2021-01-26)

Full changelog

This is an iOS release only, built with Xcode 11.7

Otherwise no functional changes.

iOS
- Build with Xcode 11.7 (#1457)

v29.1.1 (2020-05-22)

Full changelog

Android
- BUGFIX: Fix a race condition that leads to a ConcurrentModificationException. Bug 1635865

v29.1.0 (2020-05-11)

Full changelog

General:
- The version of glean_parser has been upgraded to v1.20.4
  - BUGFIX: yamllint errors are now reported using the correct file name.
- The minimum and maximum values of a timing distribution can now be controlled by the time_unit parameter. See bug 1630997 for more details.

v29.0.0 (2020-05-05)

Full changelog

General:
- The version of glean_parser has been upgraded to v1.20.2 (#827):
  - Breaking change: glinter errors found during code generation will now return an error code.
  - glean_parser now produces a linter warning when user lifetime metrics are set to expire. See bug 1604854 for additional context.
Android:
- The PingType.submit() can now be called without a null by Java consumers (#853).
Python:
- BUGFIX: Fixed a race condition in the atexit handler, that would have resulted in the message "No database found" (#854).
- The Glean FFI header is now parsed at build time rather than runtime. Relevant for packaging in PyInstaller, the wheel no longer includes glean.h and adds _glean_ffi.py (#852).
- The minimum versions of many secondary dependencies have been lowered to make the Glean SDK compatible with more environments.
- Dependencies that depend on the version of Python being used are now specified using the Declaring platform specific dependencies syntax in setuptools. This means that more recent versions of dependencies are likely to be installed on Python 3.6 and later, and unnecessary backport libraries won't be installed on more recent Python versions.
iOS:
- Glean for iOS is now being built with Xcode 11.4.1 (#856)

v28.0.0 (2020-04-23)

Full changelog

General:
- The baseline ping is now sent when the application goes to foreground, in addition to background and dirty-startup.
Python:
- BUGFIX: The ping uploader will no longer display a trace back when the upload fails due to a failed DNS lookup, network outage, or related issues that prevent communication with the telemetry endpoint.
- The dependency on inflection has been removed.
- The Python bindings now use subprocess rather than multiprocessing to perform ping uploading in a separate process. This should be more compatible on all of the platforms Glean supports.

v27.1.0 (2020-04-09)

Full changelog

General:
- BUGFIX: baseline pings sent at startup with the dirty_startup reason will now include application lifetime metrics (#810)
iOS:
- Breaking change: Change Glean iOS to use Application Support directory #815. No migration code is included. This will reset collected data if integrated without migration. Please contact the Glean SDK team if this affects you.
Python
- BUGFIX: Fixed a race condition between uploading pings and deleting the temporary directory on shutdown of the process.

v27.0.0 (2020-04-08)

Full changelog

General
- Glean will now detect when the upload enabled flag changes outside of the application, for example due to a change in a config file. This means that if upload is disabled while the application wasn't running (e.g. between the runs of a Python command using the Glean SDK), the database is correctly cleared and a deletion request ping is sent. See #791.
- The events ping now includes a reason code: startup, background or max_capacity.
iOS:
- BUGFIX: A bug where the metrics ping is sent immediately at startup on the last day of the month has been fixed.
- Glean for iOS is now being built with Xcode 11.4.0
- The measure convenience function on timing distributions and time spans will now cancel the timing if the measured function throws, then rethrow the exception (#808)
- Broken doc generation has been fixed (#805).
Kotlin
- The measure convenience function on timing distributions and time spans will now cancel the timing if the measured function throws, then rethrow the exception (#808)
Python:
- Glean will now wait at application exit for up to one second to let its worker thread complete.
- Ping uploading now happens in a separate child process by default. This can be disabled with the allow_multiprocessing configuration option.

v26.0.0 (2020-03-27)

Full changelog

General:
- The version of glean_parser has been updated to 1.19.0:
  - Breaking change: The regular expression used to validate labels is stricter and more correct.
  - Add more information about pings to markdown documentation:
    - State whether the ping includes client id;
    - Add list of data review links;
    - Add list of related bugs links.
  - glean_parser now makes it easier to write external translation functions for different language targets.
  - BUGFIX: glean_parser now works on 32-bit Windows.
Android:
- gradlew clean will no longer remove the Miniconda installation in ~/.gradle/glean. Therefore clean can be used without reinstalling Miniconda afterward every time.
Python:
- Breaking Change: The glean.util and glean.hardware modules, which were unintentionally public, have been made private.
- Most Glean work and I/O is now done on its own worker thread. This brings the parallelism Python in line with the other platforms.
- The timing distribution, memory distribution, string list, labeled boolean and labeled string metric types are now supported in Python (#762, #763, #765, #766)

v25.1.0 (2020-02-26)

Full changelog

Python:
- The Boolean, Datetime and Timespan metric types are now supported in Python (#731, #732, #737)
- Make public, document and test the debugging features (#733)

v25.0.0 (2020-02-17)

Full changelog

General:
- ping_type is not included in the ping_info any more (#653), the pipeline takes the value from the submission URL.
- The version of glean_parser has been upgraded to 1.18.2:
  - Breaking Change (Java API) Have the metrics names in Java match the names in Kotlin. See Bug 1588060.
  - The reasons a ping are sent are now included in the generated markdown documentation.
Android:
- The Glean.initialize method runs mostly off the main thread (#672).
- Labels in labeled metrics now have a correct, and slightly stricter, regular expression. See label format for more information.
iOS:
- The baseline ping will now include reason codes that indicate why it was submitted. If an unclean shutdown is detected (e.g. due to force-close), this ping will be sent at startup with reason: dirty_startup.
- Per Bug 1614785, the clearing of application lifetime metrics now occurs after the metrics ping is sent in order to preserve values meant to be included in the startup metrics ping.
- initialize() now performs most of its work in a background thread.
Python:
- When the pre-init task queue overruns, this is now recorded in the metric glean.error.preinit_tasks_overflow.
- glinter warnings are printed to stderr when loading metrics.yaml and pings.yaml files.

v24.2.0 (2020-02-11)

Full changelog

General:
- Add locale to client_info section.
- Deprecation Warning Since locale is now in the client_info section, the one in the baseline ping (glean.baseline.locale) is redundant and will be removed by the end of the quarter.
- Drop the Glean handle and move state into glean-core (#664)
- If an experiment includes no extra fields, it will no longer include {"extra": null} in the JSON payload.
- Support for ping reason codes was added.
- The metrics ping will now include reason codes that indicate why it was submitted.
- The version of glean_parser has been upgraded to 1.17.3
Android:
- Collections performed before initialization (preinit tasks) are now dispatched off the main thread during initialization.
- The baseline ping will now include reason codes that indicate why it was submitted. If an unclean shutdown is detected (e.g. due to force-close), this ping will be sent at startup with reason: dirty_startup.
iOS:
- Collections performed before initialization (preinit tasks) are now dispatched off the main thread and not awaited during initialization.
- Added recording of glean.error.preinit_tasks_overflow to report when the preinit task queue overruns, leading to data loss. See bug 1609734

v24.1.0 (2020-01-16)

Full changelog

General:
- Stopping a non started measurement in a timing distribution will now be reported as an invalid_state error.
Android:
- A new metric glean.error.preinit_tasks_overflow was added to report when the preinit task queue overruns, leading to data loss. See bug 1609482

v24.0.0 (2020-01-14)

Full changelog

General:
- Breaking Change An enableUpload parameter has been added to the initialize() function. This removes the requirement to call setUploadEnabled() prior to calling the initialize() function.
Android:
- The metrics ping scheduler will now only send metrics pings while the application is running. The application will no longer "wake up" at 4am using the Work Manager.
- The code for migrating data from Glean SDK before version 19 was removed.
- When using the GleanTestLocalServer rule in instrumented tests, pings are immediately flushed by the WorkManager and will reach the test endpoint as soon as possible.
Python:
- The Python bindings now support Python 3.5 - 3.7.
- The Python bindings are now distributed as a wheel on Linux, macOS and Windows.

v23.0.1 (2020-01-08)

Full changelog

Android:
- BUGFIX: The Glean Gradle plugin will now work if an app or library doesn't have a metrics.yaml or pings.yaml file.
iOS:
- The released iOS binaries are now built with Xcode 11.3.

v23.0.0 (2020-01-07)

Full changelog

Python bindings:
- Support for events and UUID metrics was added.
Android:
- The Glean Gradle Plugin correctly triggers docs and API updates when registry files change, without requiring them to be deleted.
- parseISOTimeString has been made 4x faster. This had an impact on Glean migration and initialization.
- Metrics with lifetime: application are now cleared when the application is started, after startup Glean SDK pings are generated.
All platforms:
- The public method PingType.send() (in all platforms) have been deprecated and renamed to PingType.submit().
- Rename deletion_request ping to deletion-request ping after glean_parser update

v22.1.0 (2019-12-17)

Full changelog

Add InvalidOverflow error to TimingDistributions (#583)

v22.0.0 (2019-12-05)

Full changelog

Add option to defer ping lifetime metric persistence (#530)
Add a crate for the nice control API (#542)
Pending deletion_request pings are resent on start (#545)

v21.3.0 (2019-12-03)

Full changelog

Timers are reset when disabled. That avoids recording timespans across disabled/enabled toggling (#495).
Add a new flag to pings: send_if_empty (#528)
Upgrade glean_parser to v1.12.0
Implement the deletion request ping in Glean (#526)

v21.2.0 (2019-11-21)

Full changelog

All platforms
- The experiments API is no longer ignored before the Glean SDK initialized. Calls are recorded and played back once the Glean SDK is initialized.
- String list items were being truncated to 20, rather than 50, bytes when using .set() (rather than .add()). This has been corrected, but it may result in changes in the sent data if using string list items longer than 20 bytes.

v21.1.1 (2019-11-20)

Full changelog

Android:
- Use the LifecycleEventObserver interface, rather than the DefaultLifecycleObserver interface, since the latter isn't compatible with old SDK targets.

v21.1.0 (2019-11-20)

Full changelog

Android:
- Two new metrics were added to investigate sending of metrics and baseline pings. See bug 1597980 for more information.
- Glean's two lifecycle observers were refactored to avoid the use of reflection.
All platforms:
- Timespans will now not record an error if stopping after setting upload enabled to false.

v21.0.0 (2019-11-18)

Full changelog

Android:
- The GleanTimerId can now be accessed in Java and is no longer a typealias.
- Fixed a bug where the metrics ping was getting scheduled twice on startup.
All platforms
- Bumped glean_parser to version 1.11.0.

v20.2.0 (2019-11-11)

Full changelog

In earlier 20.x.x releases, the version of glean-ffi was incorrectly built against the wrong version of glean-core.

v20.1.0 (2019-11-11)

Full changelog

The version of Glean is included in the Glean Gradle plugin.
When constructing a ping, events are now sorted by their timestamp. In practice, it rarely happens that event timestamps are unsorted to begin with, but this guards against a potential race condition and incorrect usage of the lower-level API.

v20.0.0 (2019-11-11)

Full changelog

Glean users should now use a Gradle plugin rather than a Gradle script. (#421) See integrating with the build system docs for more information.
In Kotlin, metrics that can record errors now have a new testing method, testGetNumRecordedErrors. (#401)

v19.1.0 (2019-10-29)

Full changelog

Fixed a crash calling start on a timing distribution metric before Glean is initialized. Timings are always measured, but only recorded when upload is enabled (#400)
BUGFIX: When the Debug Activity is used to log pings, each ping is now logged only once (#407)
New invalid state error, used in timespan recording (#230)
Add an Android crash instrumentation walk-through (#399)
Fix crashing bug by avoiding assert-printing in LMDB (#422)
Upgrade dependencies, including rkv (#416)

v19.0.0 (2019-10-22)

Full changelog

First stable release of Glean in Rust (aka glean-core). This is a major milestone in using a cross-platform implementation of Glean on the Android platform.