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Diffstat (limited to 'tools/get-scala-commit-drift')
-rwxr-xr-x | tools/get-scala-commit-drift | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tools/get-scala-commit-drift b/tools/get-scala-commit-drift new file mode 100755 index 0000000000..4959826ec1 --- /dev/null +++ b/tools/get-scala-commit-drift @@ -0,0 +1,40 @@ +#!/usr/bin/env bash +# +# Usage: get-scala-commit-drift [dir] +# Figures out current commit drift of a git clone. +# If no dir is given, current working dir is used. +# +# Example output string: +# 123 +# +# Build drift = # of commits since last tag. + +[[ $# -eq 0 ]] || cd "$1" + +ensure_tag () { + sha=$1 + rev=$2 + + [[ -n $(git tag -l $rev) ]] || { + git tag -a -m "generated by get-scala-revision" $rev $sha + } +} + +# Ensure some baseline tags are present so if this repository's +# tags are screwed up or stale, we should still have a reference +# point for a build string. +ensure_tag 58cb15c40d v2.10.0-M1 +ensure_tag 29f3eace1e v2.9.1 +ensure_tag b0d78f6b9c v2.8.2 + +# the closest tag, obtained separately because we have to +# reconstruct the string around the padded distance. +tag=$(git describe --tags --match 'v2*' --abbrev=0) + +# printf %016s is not portable for 0-padding, has to be a digit. +# so we're stuck disassembling it. +described=$(git describe --tags --match 'v2*' --abbrev=10) +suffix="${described##${tag}-}" +counter=$(echo $suffix | cut -d - -f 1) + +echo "$counter" |