Re: git Tutorial?

From: Patrick Mochel <mochel@digitalimplant.org>
Date: Jun 25, 2005, 01:27 UTC
Message-ID: <Pine.LNX.4.50.0506241807260.29122-100000@monsoon.he.net>
In-Reply-To: <Pine.LNX.4.58.0506240910040.11175@ppc970.osdl.org>

On Fri, 24 Jun 2005, Linus Torvalds wrote:

Show 5 quoted lines

>
>
> [ git-list cc'd, since these example things might be useful to others ]
>
> On Fri, 24 Jun 2005, Patrick Mochel wrote:

Show 22 quoted lines

> > The handy things I've noticed missing are the equivalents of
> >
> > - bk changes -u<user> (Great for tracking down a change one did)
>
> You can script it (and if you do so nicely, feel free to send me a
> patch). Here's the magic long-hand version that does something fairly
> close to it:
>
> 	git-rev-list --header HEAD |
> 		grep -z author.*torvalds |
> 		tr '\0\n' '\n:' |
> 		cut -d: -f1 |
> 		git-diff-tree --pretty --stdin -p |
> 		less -S
>
> (That's really hacky, because "cut" and other standard unix tools don't
> like using '\0' as a record separator, but hey, whatever works..)
>
> The above gives the result in "git-whatchanged" format, ie you get the
> patch too. If you don't want to see the patch, give the "-s" flag to
> git-diff-tree instead of the "-p" flag, but if you script it, I'd suggest
> allowing the user to give that as an option to the script.

Ok, it ain't exactly pretty, but it works.

Below is a patch to git-whatchanged that adds some optional parameters to it that allow users to filter the changesets returned by git-rev-list.

	-a	Specify the author's name.
		This can be any part of the "author" line: the first name,
		the last name, both, the login name, the domain name, or
		the entire email address.

		For example:

		git-whatchanged -a "Linus"
		git-whatchanged -a "Linus Torvalds"
		git-whatchanged -a "torvalds"
		git-whatchanged -a "torvalds@ppc970.osdl.org"
		git-whatchanged -a "@osdl.org"

	-c	Specify the committer's name
		Like the above, this can be any part of the "committer"
		line. For example:

		git-whatchanged -c "Greg"
		git-whatchanged -c "suse.de"
		git-whatchanged -c "gregkh@suse.de"

	And for good measure:

	-s	Specify a person that signed off on a patch.

		git-whatchanged -s "Linus Torvalds"
		git-whatchanged -s "mochel@digitalimplant.org"

		It doesn't support multiple "Signed-off-by" entries.

	They can also be used together:

	git-whatchanged -a mochel@digitalimplant.org -c gregkh@suse.de
	git-whatchanged -a Dunlap -s Torvalds

By default, it still just prints the changeset comments. Passing '-p' will print the patches.

Please note that my script-fu isn't exactly good, so the patch is probably done in the worst possible way. Please feel free to rewrite it or simply just toss it.

Thanks,

Pat

diff --git a/git-whatchanged b/git-whatchanged
--- a/git-whatchanged
+++ b/git-whatchanged
@@ -1,4 +1,44 @@
 #!/bin/sh
-git-rev-list $(git-rev-parse --default HEAD --revs-only "$@") |
-	git-diff-tree --stdin --pretty -r $(git-rev-parse --no-revs "$@") |
+
+Author=""
+Committer=""
+SignedOffBy=""
+Args=""
+
+while [ $# -gt 0 ] ; do
+
+	echo $1
+case $1 in
+	-a)
+		shift
+		Author="$1"
+		;;
+	-c)
+		shift
+		Committer="$1"
+		;;
+	-s)
+		shift
+		SignedOffBy="$1"
+		;;
+	*)
+		Args="$Args $1"
+		;;
+
+esac
+	shift
+done
+
+filter_cset() {
+	egrep -z "author[[:print:]]+$Author" |
+	egrep -z "committer[[:print:]]+$Committer" |
+	egrep -z "Signed-off-by:[[:print:]]+$SignedOffBy"
+}
+
+
+git-rev-list --header $(git-rev-parse --default HEAD --revs-only "$Args") |
+	filter_cset |
+	tr '\0\n' '\n:' | cut -d: -f1 |
+	git-diff-tree --stdin --pretty $(git-rev-parse --no-revs "$Args") |
 	LESS="$LESS -S" ${PAGER:-less}
+