161 lines
3.9 KiB
Bash
Executable File
161 lines
3.9 KiB
Bash
Executable File
#!/bin/sh
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self="$0"
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dirname_self=$(dirname "$self")
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usage() {
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cat <<EOF >&2
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Usage: $self [option]
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This script applies a whitespace transformation to the commit at HEAD. If no
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options are given, then the modified files are left in the working tree.
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Options:
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-h, --help Shows this message
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-n, --dry-run Shows a diff of the changes to be made.
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--amend Squashes the changes into the commit at HEAD
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This option will also reformat the commit message.
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--commit Creates a new commit containing only the whitespace changes
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--msg-only Reformat the commit message only, ignore the patch itself.
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EOF
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rm -f ${CLEAN_FILES}
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exit 1
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}
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log() {
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echo "${self##*/}: $@" >&2
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}
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vpx_style() {
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astyle --style=bsd --min-conditional-indent=0 --break-blocks \
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--pad-oper --pad-header --unpad-paren \
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--align-pointer=name \
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--indent-preprocessor --convert-tabs --indent-labels \
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--suffix=none --quiet "$@"
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sed -i 's/[[:space:]]\{1,\},/,/g' "$@"
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}
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apply() {
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[ $INTERSECT_RESULT -ne 0 ] && patch -p1 < "$1"
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}
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commit() {
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LAST_CHANGEID=$(git show | awk '/Change-Id:/{print $2}')
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if [ -z "$LAST_CHANGEID" ]; then
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log "HEAD doesn't have a Change-Id, unable to generate a new commit"
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exit 1
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fi
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# Build a deterministic Change-Id from the parent's
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NEW_CHANGEID=${LAST_CHANGEID}-styled
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NEW_CHANGEID=I$(echo $NEW_CHANGEID | git hash-object --stdin)
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# Commit, preserving authorship from the parent commit.
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git commit -a -C HEAD > /dev/null
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git commit --amend -F- << EOF
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Cosmetic: Fix whitespace in change ${LAST_CHANGEID:0:9}
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Change-Id: ${NEW_CHANGEID}
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EOF
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}
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show_commit_msg_diff() {
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if [ $DIFF_MSG_RESULT -ne 0 ]; then
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log "Modified commit message:"
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diff -u "$ORIG_COMMIT_MSG" "$NEW_COMMIT_MSG" | tail -n +3
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fi
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}
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amend() {
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show_commit_msg_diff
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if [ $DIFF_MSG_RESULT -ne 0 ] || [ $INTERSECT_RESULT -ne 0 ]; then
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git commit -a --amend -F "$NEW_COMMIT_MSG"
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fi
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}
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diff_msg() {
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git log -1 --format=%B > "$ORIG_COMMIT_MSG"
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"${dirname_self}"/wrap-commit-msg.py \
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< "$ORIG_COMMIT_MSG" > "$NEW_COMMIT_MSG"
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cmp -s "$ORIG_COMMIT_MSG" "$NEW_COMMIT_MSG"
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DIFF_MSG_RESULT=$?
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}
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# Temporary files
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ORIG_DIFF=orig.diff.$$
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MODIFIED_DIFF=modified.diff.$$
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FINAL_DIFF=final.diff.$$
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ORIG_COMMIT_MSG=orig.commit-msg.$$
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NEW_COMMIT_MSG=new.commit-msg.$$
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CLEAN_FILES="${ORIG_DIFF} ${MODIFIED_DIFF} ${FINAL_DIFF}"
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CLEAN_FILES="${CLEAN_FILES} ${ORIG_COMMIT_MSG} ${NEW_COMMIT_MSG}"
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# Preconditions
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[ $# -lt 2 ] || usage
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# Check that astyle supports pad-header and align-pointer=name
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if ! astyle --pad-header --align-pointer=name < /dev/null; then
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log "Install astyle v1.24 or newer"
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exit 1
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fi
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if ! git diff --quiet HEAD; then
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log "Working tree is dirty, commit your changes first"
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exit 1
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fi
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# Need to be in the root
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cd "$(git rev-parse --show-toplevel)"
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# Collect the original diff
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git show > "${ORIG_DIFF}"
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# Apply the style guide on new and modified files and collect its diff
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for f in $(git diff HEAD^ --name-only -M90 --diff-filter=AM \
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| grep '\.[ch]$'); do
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case "$f" in
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third_party/*) continue;;
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nestegg/*) continue;;
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esac
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vpx_style "$f"
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done
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git diff --no-color --no-ext-diff > "${MODIFIED_DIFF}"
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# Intersect the two diffs
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"${dirname_self}"/intersect-diffs.py \
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"${ORIG_DIFF}" "${MODIFIED_DIFF}" > "${FINAL_DIFF}"
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INTERSECT_RESULT=$?
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git reset --hard >/dev/null
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# Fixup the commit message
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diff_msg
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# Handle options
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if [ -n "$1" ]; then
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case "$1" in
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-h|--help) usage;;
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-n|--dry-run) cat "${FINAL_DIFF}"; show_commit_msg_diff;;
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--commit) apply "${FINAL_DIFF}"; commit;;
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--amend) apply "${FINAL_DIFF}"; amend;;
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--msg-only) amend;;
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*) usage;;
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esac
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else
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apply "${FINAL_DIFF}"
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if ! git diff --quiet; then
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log "Formatting changes applied, verify and commit."
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log "See also: http://www.webmproject.org/code/contribute/conventions/"
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git diff --stat
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fi
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fi
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rm -f ${CLEAN_FILES}
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