ardupilot/Tools/gittools/git-subsystems-split

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#!/bin/bash
SCRIPT_DIR=$(dirname $(realpath ${BASH_SOURCE[0]}))
GIT_DIR=$(git rev-parse --git-dir)
GIT_ROOT=$(git rev-parse --show-toplevel)
MSG_FILE="$GIT_DIR/SUBSYSTEMS_SPLIT_MSG"
usage() {
cat >&$1 <<EOF
git subsystems-split [OPTIONS]
Ardupilot's git extension.
Split HEAD commit into commits separated by subsystems (vehicles, libraries and
folders in the project's root). Basically, reset and call commit-subsystems.
If neither --copy or --edit is passed, then subsystems-split will try to make
the original commit's message into a template for commit-subsystems.
Options:
--copy
Make all commits have exactly the same message as the HEAD commit.
--edit
Edit the commit message as a template for commit-subsystems.
EOF
}
option_copy=false
option_edit=false
while [[ -n "$1" ]]; do
opt="$1"
case "$opt" in
-h|--help)
usage 1
exit 0
;;
--copy)
option_copy=true
;;
--edit)
option_edit=true
;;
*)
usage 2
exit 1
;;
esac
shift
done
if $option_copy && $option_edit; then
echo "Options --copy and --edit can't be combined." >&2
exit 1
fi
author_name=$(git log -n 1 --format=%an)
author_email=$(git log -n 1 --format=%ae)
author="$author_name <$author_email>"
git log -n 1 --format=%B > "$MSG_FILE"
if $option_edit; then
if [[ -z $EDITOR ]]; then
echo "Environment variable EDITOR is required for option --edit." >&2
exit 1
fi
($EDITOR "$MSG_FILE")
elif ! $option_copy; then
if head -n 1 "$MSG_FILE" | grep "^[^: ]\+\s*:" -q; then
sed '1 s,^[^: ]\+\s*,$subsystem,' -i "$MSG_FILE"
else
buff_file="$(mktemp)"
awk '
NR == 1 {
l=sub(/^\s\+/, "", $line);
print "$subsystem: " \
tolower(substr($l, 1, 1)) \
substr($l, 2);
}
NR != 1
' "$MSG_FILE" > "$buff_file"
mv "$buff_file" "$MSG_FILE"
rm "$buff_file"
fi
fi
HEAD=$(git rev-parse HEAD)
git reset HEAD~1 --soft
if ! "$SCRIPT_DIR/git-commit-subsystems" -F "$MSG_FILE" --author="$author"; then
echo "Error on calling git-commit-subsystems." >&2
git reset $HEAD
exit 1
fi