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https://git.openwrt.org/openwrt/openwrt.git
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a83b2af47f
The SOURCE_DATE_EPOCH variable is used to make builds reproducible even if rebuild at different times. Instead of using the current timestamp, the time of the last source change is used. Created packages are `touch`ed with a specific timestamp so resulting packages have the same checksums. The `get_source_date_epoch.sh` script tries multiple ways (file, git, hg) to determine the correct timestamp. Until now the script would only consider the $TOPDIR instead of package specific changes. Resulting in packages with same versions but different timestamps, as $TOPDIR (openwrt.git) received changes not affecting package versions. This results in warning/erros in `opkg` as the package versions stay the same but checksums changed. This commit adds an optional argument to get the `SOURCE_DATE_EPOCH` of a specific path (e.g. package SOURCE) rather than the $TOPDIR. As a consequence this allows granular but still reproducible timestamps. As packages might be distributed over multiple repositories the check for `.git/` becomes unfeasible. Instead tell `git` and `hg` to change their working directories and automatically traverse the repo folder. Signed-off-by: Paul Spooren <mail@aparcar.org>
36 lines
757 B
Bash
Executable File
36 lines
757 B
Bash
Executable File
#!/usr/bin/env bash
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export LANG=C
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export LC_ALL=C
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if [ -n "$TOPDIR" ]; then
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cd "$TOPDIR" || exit 1
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fi
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SOURCE="${1:-.}"
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try_version() {
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[ -f "$SOURCE/version.date" ] || return 1
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SOURCE_DATE_EPOCH=$(cat "$SOURCE/version.date")
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[ -n "$SOURCE_DATE_EPOCH" ]
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}
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try_git() {
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SOURCE_DATE_EPOCH=$(git -C "$SOURCE" log -1 --format=format:%ct \
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"$SOURCE" 2>/dev/null)
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[ -n "$SOURCE_DATE_EPOCH" ]
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}
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try_hg() {
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SOURCE_DATE_EPOCH=$(hg --cwd "$SOURCE" log --template '{date}' -l 1 \
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"$SOURCE" 2>/dev/null | cut -d. -f1)
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[ -n "$SOURCE_DATE_EPOCH" ]
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}
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try_mtime() {
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SOURCE_DATE_EPOCH=$(perl -e 'print((stat $ARGV[0])[9])' "$0")
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[ -n "$SOURCE_DATE_EPOCH" ]
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}
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try_version || try_git || try_hg || try_mtime || SOURCE_DATE_EPOCH=""
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echo "$SOURCE_DATE_EPOCH"
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