I have been looking at what git-rev-parse does and could not
figure out a way to convince it to give me only arguments with
a '-' prefix. Specifically, I wanted to remove the hardcoded -p
and -M flags from git-diff-script. Running
$ sh -x git-diff-script -C HEAD^ HEAD
reveals that none of the following would pick up "-C" from the
command line:
rev=($(git-rev-parse --revs-only "$@")) || exit
flags=($(git-rev-parse --no-revs --flags "$@"))
files=($(git-rev-parse --no-revs --no-flags "$@"))
I am not even sure if the current implementation of rev-parse
matches what you originally wanted it to do; I suspect it does
not. I would like to know what was the intended behaviour
first, so that I can enhance it to be usable for my purpose
without breaking things.
What I want the rev-parse flags to mean is as follows. By "rev
argument", I mean what get_sha1() can understand. I have to
admit that some flags are what I introduced while I was
butchering it without really knowing the original intention:
output format:
--sq output in a format usable for shell "eval".
--symbolic output rev argument in symbolic form, not SHA1.
output selection:
--flags show only arguments with '-' prefix.
--no-flags do not show arguments with '-' prefix.
--revs-only show only arguments meant for rev-list.
--no-revs show arguments not meant for rev-list.
input munging:
--default R if no revision, pretend R is given.
--not pretend all rev arguments without prefix ^ have
prefix ^, and the ones with prefix ^ do not.
--all pretend all refs under $GIT_DIR/refs are given
on the command line.
special:
--verify make sure only one rev argument is given, nothing else.
I think flags/no-flags and revs-only/no-revs *should* be
orthogonal. That is, "rev-parse --flags --no-revs" should give
parameters that start with '-' and not meant for rev-list
(e.g. '-C' in earlier example); "rev-parse --revs-only
--merge-order HEAD Documentation/" should yield "--merge-order
HEAD".
Also there is an undocumented --show-prefix. What is it?
-jc
PS. BTW, any response about unsuspecting companies?
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