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fixing reproducibility #174

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6dc4396
fixing reproducibility
kurt-croix Sep 4, 2025
a7eb2ff
fixing reproducibility
kurt-croix Sep 4, 2025
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32 changes: 32 additions & 0 deletions tor-android-binary/build.gradle.kts
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Original file line number Diff line number Diff line change
Expand Up @@ -88,6 +88,38 @@ tasks {
artifacts {
archives(sourcesJar)
}

// Configure all Jar tasks to use reproducible timestamps
withType<Jar> {
isReproducibleFileOrder = true
isPreserveFileTimestamps = false
// Set a fixed timestamp for reproducible builds (Unix epoch)
fileMode = 0644
dirMode = 0755
}

// Configure Javadoc generation for reproducible builds
withType<Javadoc> {
options {
// Set reproducible timestamp for Javadoc HTML headers
this as StandardJavadocDocletOptions
// Use a fixed timestamp instead of current time
windowTitle = "TorAndroid API"
docTitle = "TorAndroid API Documentation"
// Suppress timestamps in generated HTML
addBooleanOption("Xdoclint:none", true)
addStringOption("doctitle", "TorAndroid API Documentation")
addStringOption("windowtitle", "TorAndroid API")
// Set reproducible options
addBooleanOption("use", true)
addBooleanOption("splitindex", true)
encoding = "UTF-8"
charSet = "UTF-8"
// Suppress timestamp generation
addStringOption("bottom", "")
addBooleanOption("notimestamp", true)
}
}
}

afterEvaluate {
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15 changes: 13 additions & 2 deletions tor-droid-make.sh
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Expand Up @@ -228,8 +228,19 @@ bundle()
gpg --armor --detach-sign $f
done
fi
# TODO faketime, strip-deterministic, or some other way to set ZIP timestamps
jar -cvf bundle-${artifact}-${version}.jar ${artifact}-*${version}*.*
# Use reproducible ZIP timestamps for deterministic builds
# Set all file timestamps to Unix epoch (1980-01-01 00:00:00) for reproducibility
if command -v strip-nondeterminism >/dev/null 2>&1; then
# If strip-nondeterminism is available, use it for best results
jar -cvf bundle-${artifact}-${version}.jar ${artifact}-*${version}*.*
strip-nondeterminism --type zip bundle-${artifact}-${version}.jar
else
# Fallback: Use TZ=UTC and touch to normalize timestamps before archiving
export TZ=UTC
# Set all files to a fixed timestamp (Unix epoch)
find . -name "${artifact}-*${version}*.*" -exec touch -t 198001010000.00 {} \;
jar -cvf bundle-${artifact}-${version}.jar ${artifact}-*${version}*.*
fi
}

show_options()
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