103 lines
2.6 KiB
Bash
Executable File
103 lines
2.6 KiB
Bash
Executable File
#!/usr/bin/env bash
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#
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# git-split.sh - duplicate GIT file, with history (well, sort of)
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# Sources:
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# https://stackoverflow.com/a/53849613/3079831
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# https://stackoverflow.com/a/75942970/3079831
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#
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# (C) Bruno Raoult ("br"), 2024
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# Licensed under the GNU General Public License v3.0 or later.
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# Some rights reserved. See COPYING.
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#
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# You should have received a copy of the GNU General Public License along with this
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# program. If not, see <https://www.gnu.org/licenses/gpl-3.0-standalone.html>.
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#
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# SPDX-License-Identifier: GPL-3.0-or-later <https://spdx.org/licenses/GPL-3.0-or-later.html>
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CMDNAME=${0##*/} # script name
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if (( $# == 0 || $# % 2 )); then
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printf "Usage: %s orig1 copy [orig2 copy2 ...]\n" "$CMDNAME"
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exit 1
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fi
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yes_or_no() {
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while true; do
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read -rp "$* [y/N]: " yn
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case $yn in
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[Yy])
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return 0
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;;
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[Nn]|"")
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printf "Aborted.\n"
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return 1
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;;
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esac
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done
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# not reached
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}
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# prints out and run a command.
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echorun () {
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printf ">>> %s\n" "$*"
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"$@"
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return $?
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}
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declare -A files
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declare -a from # to keep order
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while (($#)); do
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if [[ ! -f "$1" ]]; then
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printf "Missing '%s'. Aborting.\n" "$1"
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exit 1
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elif [[ -f "$2" ]]; then
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printf "'%s' already exists. Aborting.\n" "$2"
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exit 1
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fi
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files["$1"]="$2"
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from+=("$1")
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shift 2
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done
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printf "The following files will be split :\n"
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for file in "${from[@]}"; do
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printf "%s -> %s\n" "$file" "${files[$file]}"
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done
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yes_or_no "Proceed (y/N)? " || exit 1
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branch="split-file"
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printf -v msg1 "Splitting '%s'" "${from[0]}"
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printf -v msg2 "Restore duplicated %s" "${from[0]}"
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if (( ${#from[@]} > 1 )); then
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msg1+=" and $(( ${#from[@]} - 1 )) others"
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msg2+=" and $(( ${#from[@]} - 1 )) others"
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fi
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printf "%s using branch '$branch'.\n" "$msg1"
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if git show-ref --verify --quiet "refs/heads/$branch"; then
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echorun git switch "$branch"
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echorun git merge master
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else
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echorun git switch -c "$branch"
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fi
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for file in "${from[@]}"; do # make the duplicates
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echorun git mv "$file" "${files[$file]}"
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done
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echorun git commit -m "$msg1" # ... and commit
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for file in "${from[@]}"; do # bring back the original
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echorun git checkout HEAD~ "$file"
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done
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echorun git commit -m "$msg2" # ... and commit
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echorun git checkout - # switch back to source branch
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echorun git merge --no-ff "$branch" -m "Merge $branch" # merge dup into source branch
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exit 0
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