On Tue, 3 Jan 2023 00:21:53 GMT, John Neffenger <jgn...@openjdk.org> wrote:
>> This pull request allows for reproducible builds of JavaFX on Linux, macOS, >> and Windows by defining the `SOURCE_DATE_EPOCH` environment variable. For >> example, the following commands create a reproducible build: >> >> >> $ export SOURCE_DATE_EPOCH=$(git log -1 --pretty=%ct) >> $ bash gradlew sdk jmods javadoc >> $ strip-nondeterminism -v -T $SOURCE_DATE_EPOCH build/jmods/*.jmod >> >> >> The three commands: >> >> 1. set the build timestamp to the date of the latest source code change, >> 2. build the JavaFX SDK libraries, JMOD archives, and API documentation, and >> 3. recreate the JMOD files with stable file modification times and ordering. >> >> The third command won't be necessary once Gradle can build the JMOD archives >> or the `jmod` tool itself has the required support. For more information on >> the environment variable, see the [`SOURCE_DATE_EPOCH`][1] page. For more >> information on the command to recreate the JMOD files, see the >> [`strip-nondeterminism`][2] repository. I'd like to propose that we allow >> for reproducible builds in JavaFX 17 and consider making them the default in >> JavaFX 18. >> >> #### Fixes >> >> There are at least four sources of non-determinism in the JavaFX builds: >> >> 1. Build timestamp >> >> The class `com.sun.javafx.runtime.VersionInfo` in the JavaFX Base module >> stores the time of the build. Furthermore, for builds that don't run on the >> Hudson continuous integration tool, the class adds the build time to the >> system property `javafx.runtime.version`. >> >> 2. Modification times >> >> The JAR, JMOD, and ZIP archives store the modification time of each file. >> >> 3. File ordering >> >> The JAR, JMOD, and ZIP archives store their files in the order returned >> by the file system. The native shared libraries also store their object >> files in the order returned by the file system. Most file systems, though, >> do not guarantee the order of a directory's file listing. >> >> 4. Build path >> >> The class `com.sun.javafx.css.parser.Css2Bin` in the JavaFX Graphics >> module stores the absolute path of its `.css` input file in the >> corresponding `.bss` output file, which is then included in the JavaFX >> Controls module. >> >> This pull request modifies the Gradle and Groovy build files to fix the >> first three sources of non-determinism. A later pull request can modify the >> Java files to fix the fourth. >> >> [1]: https://reproducible-builds.org/docs/source-date-epoch/ >> [2]: https://salsa.debian.org/reproducible-builds/strip-nondeterminism > > John Neffenger has updated the pull request with a new target base due to a > merge or a rebase. The pull request now contains 17 commits: > > - Add '--date' argument for deterministic JMOD files > - Merge branch 'master' into allow-reproducible-builds > - Merge branch 'master' into allow-reproducible-builds > - Comment out 'jmod --date' until building on JDK 19 > > Support for the 'jmod --date' option was added to JDK 19 starting > with the 19+2 early-access build, and it was backported to JDK 17 > starting with release 17.0.3. It is not available in JDK 18. > - Merge 'master' into allow-reproducible-builds > - Make minimal changes for new '--date' option > - Add new '--date' option to JMOD task > - Add '--source-date' option to JMOD task > - Get build timestamp in UTC and set ZIP timestamps > > Create the build timestamp as a zoned date and time in UTC instead > of a local date and time. If SOURCE_DATE_EPOCH is defined, set the > last modification time of ZIP and JAR entries to the local date and > time in UTC of the instant defined by SOURCE_DATE_EPOCH. > > Add a comment as a reminder to make JMOD files deterministic when > the following enhancements are complete: > > * Enable deterministic file content ordering for Jar and Jmod > https://bugs.openjdk.java.net/browse/JDK-8276764 > https://github.com/openjdk/jdk/pull/6395 > > * Enable jar and jmod to produce deterministic timestamped content > https://bugs.openjdk.java.net/browse/JDK-8276766 > https://github.com/openjdk/jdk/pull/6481 > - Merge branch 'master' into allow-reproducible-builds > - ... and 7 more: https://git.openjdk.org/jfx/compare/a35c3bf7...1e4c083b build.gradle line 5573: > 5571: args(srcLegalDir) > 5572: if (sourceDateEpoch != null) { > 5573: args("--date", buildTimestamp) Since the minimum boot JDK for building JavaFX is still JDK 17 GA, you will need to qualify this with a check for `if (jdk19OrLater)`. See the following for a pattern to use to define that flag: https://github.com/openjdk/jfx/blob/1e4c083b90281e91b1e9cbbc615401e89bb933b1/build.gradle#L699-L704 Btw, the comment in that block should read "based on whether we are _building_ on JDK 18 or later". ------------- PR: https://git.openjdk.org/jfx/pull/446
