mirror of
https://github.com/NixOS/nixpkgs.git
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75 lines
1.1 KiB
Bash
75 lines
1.1 KiB
Bash
if [ "$1" != "rev-parse" ]; then
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echo "$@" >&2
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exit 1
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fi
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shift
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short=0
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shortlen=7
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ref=
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while [ $# -gt 0 ]; do
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case "$1" in
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--short)
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short=1
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if [ $# -gt 1 ] && [ "$2" -eq "$2" ] 2>/dev/null; then
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shortlen=$2
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shift
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else
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shortlen=7
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fi
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;;
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--short=*)
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short=1
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shortlen=''${1#--short=}
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;;
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--is-inside-work-tree)
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echo true
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exit 0
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;;
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HEAD|HEAD:*)
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ref=$1
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;;
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*)
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echo "rev-parse $@" >&2
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exit 1
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;;
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esac
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shift
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done
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if [ -z "$ref" ]; then
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echo "rev-parse" >&2
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exit 1
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fi
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case "$ref" in
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HEAD)
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path=$(pwd)
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hash=
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while [ "$path" != "/" ]; do
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if [ -f "$path/.gitrev" ]; then
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hash=$(cat "$path/.gitrev")
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break
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fi
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path=$(dirname "$path")
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done
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;;
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HEAD:*)
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subpath=''${ref#HEAD:}
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if [ -f "$PWD/$subpath/.gitrev" ]; then
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hash=$(cat "$PWD/$subpath/.gitrev")
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fi
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;;
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esac
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if [ -z "$hash" ]; then
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echo "rev-parse $ref" >&2
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exit 1
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fi
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if [ "$short" -eq 1 ]; then
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printf '%s\n' "$(printf '%s' "$hash" | cut -c1-"$shortlen")"
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else
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printf '%s\n' "$hash"
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fi
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