Attempt to make the Proguard output deterministic

bazelbuild · Jun 18, 2024 · a8a7d38 · a8a7d38
1 parent 4f17e4b
commit a8a7d38
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/third_party/BUILD b/third_party/BUILD
@@ -319,6 +319,12 @@ genrule(
         -libraryjars '<java.home>/jmods/java.base.jmod(!**.jar;!module-info.class)' \
         @$(location fastutil.proguard) \
       | tail -n +2 # Skip the "ProGuard, version X" line
+    # Null out the file times stored in the jar to make the output reproducible.
+    TMPDIR=$$(mktemp -d)
+    trap 'rm -rf $$TMPDIR' EXIT
+    unzip -q $@ -d $$TMPDIR
+    find $$TMPDIR -exec touch -t 197001010000 {} +
+    zip -qr $@ -D $$TMPDIR
     """,
     tools = [
         "fastutil.proguard",