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#!/bin/sh
# After setting the fake editor with this function, you can
#
# - override the commit message with $FAKE_COMMIT_MESSAGE
# - amend the commit message with $FAKE_COMMIT_AMEND
# - check that non-commit messages have a certain line count with $EXPECT_COUNT
# - check the commit count in the commit message header with $EXPECT_HEADER_COUNT
# - rewrite a rebase -i script as directed by $FAKE_LINES.
# $FAKE_LINES consists of a sequence of words separated by spaces.
# The following word combinations are possible:
#
# "<lineno>" -- add a "pick" line with the SHA1 taken from the
# specified line.
#
# "<cmd> <lineno>" -- add a line with the specified command
# ("squash", "fixup", "edit", or "reword") and the SHA1 taken
# from the specified line.
#
# "#" -- Add a comment line.
#
# ">" -- Add a blank line.
set_fake_editor () {
echo "#!$SHELL_PATH" >fake-editor.sh
cat >> fake-editor.sh <<\EOF
case "$1" in
*/COMMIT_EDITMSG)
test -z "$EXPECT_HEADER_COUNT" ||
test "$EXPECT_HEADER_COUNT" = $(sed -n '1s/^# This is a combination of \(.*\) commits\./\1/p' < "$1") ||
exit
test -z "$FAKE_COMMIT_MESSAGE" || echo "$FAKE_COMMIT_MESSAGE" > "$1"
test -z "$FAKE_COMMIT_AMEND" || echo "$FAKE_COMMIT_AMEND" >> "$1"
exit
;;
esac
test -z "$EXPECT_COUNT" ||
test "$EXPECT_COUNT" = $(sed -e '/^#/d' -e '/^$/d' < "$1" | wc -l) ||
exit
test -z "$FAKE_LINES" && exit
grep -v '^#' < "$1" > "$1".tmp
rm -f "$1"
echo 'rebase -i script before editing:'
cat "$1".tmp
action=pick
for line in $FAKE_LINES; do
case $line in
squash|fixup|edit|reword)
action="$line";;
"#")
echo '# comment' >> "$1";;
">")
echo >> "$1";;
*)
sed -n "${line}s/^pick/$action/p" < "$1".tmp >> "$1"
action=pick;;
esac
done
echo 'rebase -i script after editing:'
cat "$1"
EOF
test_set_editor "$(pwd)/fake-editor.sh"
chmod a+x fake-editor.sh
}
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