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https://github.com/tj/git-extras.git
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47 lines
1.7 KiB
Bash
Executable file
47 lines
1.7 KiB
Bash
Executable file
#!/usr/bin/env bash
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#
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# Change files modification time to their last commit date
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#
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if [ "$1" = "--touch" ]; then
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# Internal use option only just to parallelize things.
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newer_flag=""
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[ "$2" = "--newer" ] && newer_flag="true"
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shift 2
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bsd=$(date -j > /dev/null 2>&1 && echo 'true')
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if [ -n "$bsd" ]; then
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stat_flags="-f %m"
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date_flags="-r"
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else
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stat_flags="-c %Y"
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date_flags="-d@"
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fi
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for f; do
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git_s=$(git --no-pager log --no-renames --pretty=format:%ct -1 @ -- "$f" 2>/dev/null)
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# shellcheck disable=SC2086
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mod_s=$(stat $stat_flags "$f" 2>/dev/null)
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if [ -n "$git_s" ] && [ -n "$mod_s" ] && [ "$mod_s" -ne "$git_s" ]; then
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if [ "$mod_s" -gt "$git_s" ] || [ -z "$newer_flag" ]; then
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# shellcheck disable=SC2086
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t=$(date $date_flags$git_s '+%Y%m%d%H%M.%S')
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echo "+ touch -h -t $t $f" >&2
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touch -h -t "$t" "$f"
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fi
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fi
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done
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else
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opt_r=$(xargs -r false < /dev/null > /dev/null 2>&1 && echo '-r')
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# `-n` should be limited or parallelization will not give effect,
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# because all args will go into single worker.
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NPROC=$(nproc 2>/dev/null || sysctl -n hw.ncpu 2>/dev/null || getconf _NPROCESSORS_ONLN 2>/dev/null)
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# don't touch files that have been modified in the worktree or index
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# bsd doesn't have `-z` option for `comm` and `cut`, so use `tr` as work around
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prefix="$(git rev-parse --show-prefix) "
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# shellcheck disable=SC2086
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comm -23 <(git ls-tree -z -r --name-only --full-name @ | tr '\0' '\n' | sort) \
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<(git status -z --porcelain | tr '\0' '\n' | cut -c 4- | sort) \
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| cut -c ${#prefix}- \
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| tr '\n' '\0' \
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| xargs -0 -P"${NPROC:-1}" -n 24 $opt_r git utimes --touch "$1"
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fi
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