Re: [RFC/PATCH 1/4] Add git-sequencer shell prototype

Stephan Beyer [off-list ref] writes:

+# Generate message, patch and author script files
+make_patch () {
+	parent_sha1=$(git rev-parse --verify "$1"^) ||
+		die "Cannot get patch for $1^"
+	git diff-tree -p "$parent_sha1..$1" >"$PATCH"

First, let's not perpetuate _convenience_ calling convention of "A..B"
of git-diff* family, but use "A B" to set _endpoints_.

Second, with "A B" convention you can fairly easy deal with root
commit, changing the code to the fragment below:

+# Generate message, patch and author script files
+make_patch () {
+	parent_sha1=$(git rev-parse --verify "$1"^) ||
+		echo '--root'
+	git diff-tree -p "$parent_sha1" "$1" >"$PATCH"


BTW. what is best way of checking if given revision is parent-less?
-- 
Jakub Narebski
Poland
ShadeHawk on #git