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#!/usr/bin/env bash
# Determine CODEOWNERS of the files given in argument
# For a given commit range:
# git diff --name-only -z COMMIT1 COMMIT2 | xargs -0 dev/tools/check-owners.sh
# NB: gitignore files will be messed up if you interrupt the script.
# You should be able to just move the .gitignore.bak files back manually.
if [ $# = 0 ]; then
>&2 echo "usage: $0 [FILE]..."
exit 1
fi
if ! [ -e .github/CODEOWNERS ]; then
>&2 echo "No CODEOWNERS set up or calling from wrong directory."
exit 1
fi
# CODEOWNERS uses .gitignore patterns so we want to use git to parse it
# The only available tool for that is git check-ignore
# However it provides no way to use alternate .gitignore files
# so we rename them temporarily
find . -name .gitignore -print0 | while IFS= read -r -d '' f; do
if [ -e "$f.bak" ]; then
>&2 echo "$f.bak exists!"
exit 1
else
mv "$f" "$f.bak"
fi
done
# CODEOWNERS is not quite .gitignore patterns:
# after the pattern is the owner (space separated)
# git would interpret that as a big pattern containing spaces
# so we create a valid .gitignore by removing all but the first field
while read -r pat _; do
printf "%s\n" "$pat" >> .gitignore
done < .github/CODEOWNERS
# associative array [file => owner]
declare -A owners
for f in "$@"; do
data=$(git check-ignore --verbose --no-index "./$f")
code=$?
if [[ "$code" = 1 ]] || ! [[ "$data" =~ .gitignore:.* ]] ; then
# no match, or match from non tracked gitignore (eg global gitignore)
owners[$f]="Nobody"
else
# data looks like [.gitignore:$line:$pattern $file]
# extract the line to look it up in CODEOWNERS
data=${data#'.gitignore:'}
data=${data%%:*}
# NB: supports multiple owners
# Does not support secondary owners declared in comment
read -r _ fowners < <(sed "${data}q;d" .github/CODEOWNERS)
owners["$f"]="$fowners"
fi
done
for f in "${!owners[@]}"; do
printf "%s: %s\n" "$f" "${owners[$f]}"
done | sort -k 2 -k 1 # group by owner
# restort gitignore files
rm .gitignore
find . -name .gitignore.bak -print0 | while IFS= read -r -d '' f; do
base=${f%.bak}
if [ -e "$base" ]; then
>&2 echo "$base exists!"
else
mv "$f" "$base"
fi
done
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