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build: generate strictly increasing git revisions (#225)

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Instead of simply emitting a "git-$hash" revision, take the commit time into
account to generate strictly increasing revisions to preserve opkg upgrade
capabilities.

The format is "git-YY.DDD.SSSSS-HHHHHHH" with the following defined fields:

  - YY        year number (00..99)
  - DDD       day of year (001..366)
  - SSSSSS    second of day (00000..86399)
  - HHHHHHH   abbreviated git commit hash

An example revision is "git-14.283.50202-bb388f0".

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>
This commit is contained in:
Jo-Philipp Wich 2014-10-14 13:46:39 +02:00
parent 7f86a80be2
commit 0856030c79
1 changed files with 4 additions and 1 deletions
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5
build/mkrevision.sh
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@ -14,7 +14,10 @@ TOPDIR="${0%mkrevision.sh}"
elif git log -1 >/dev/null 2>/dev/null; then
revision="svn-r$(LC_ALL=C git log -1 | sed -ne 's/.*git-svn-id: .*@\([0-9]\+\) .*/\1/p')"
if [ "$revision" = "svn-r" ]; then
revision="git-$(LC_ALL=C git log -1 --pretty=%h)"
set -- $(git log -1 --format="%ct %h")
secs="$(($1 % 86400))"
yday="$(date --utc --date="@$1" "+%y.%j")"
revision="$(printf 'git-%s.%05d-%s' "$yday" "$secs" "$2")"
fi
else
revision="unknown"