35 lines
1.1 KiB
Bash
Executable File
35 lines
1.1 KiB
Bash
Executable File
#!/bin/sh -e
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#
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# This hook adds a comment for guidance about the commit message
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# format on top of the default commit message.
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#
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# Called by "git commit" with the name of the file that has the
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# commit message, followed by the description of the commit
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# message's source. The hook's purpose is to edit the commit
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# message file. If the hook fails with a non-zero status,
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# the commit is aborted.
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#
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# To enable this hook, set the hooksPath in git:
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# git config core.hooksPath .dev/githooks
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COMMIT_MSG_FILE=$1
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COMMIT_SOURCE=$2
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SHA1=$3
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beginswith() { case $2 in "$1"*) true;; *) false;; esac; }
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original=$(cat "$COMMIT_MSG_FILE")
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if beginswith $'\n#' "$original"; then
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# Find common path prefix of changed files
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path=$(while read file
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do test -z "$count" && common="$file" && count=$(expr length "$file") ||
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while expr substr "$file" $count 1 != substr "$common" $count 1 >/dev/null; do let count--; done
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done <<<"$(git -P diff --cached --name-only -r)" &&
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expr substr "${common%.}" 1 "$count")
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case "$path" in ([0-9]*) path="${path#*/}";; esac
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{
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echo "${path%/}:"
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echo "$original"
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} > "$COMMIT_MSG_FILE"
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fi
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