[PATCH] Many new features for cg-diff and cg-log

Petr Baudis wrote:

FYI, I plan to release 0.11.2 this evening. I'll try to go through some
more queued patches before and update cg-log to fully use git-rev-list.

In that case, you might want to have a look at this patch. I've been 
tinkering with cg-log and cg-diff for some time, and just about got 
ready to send you a patch.

Sorry about the monster patch, but I wanted to get it to you quickly...

...

[PATCH] Many new features for cg-diff and cg-log

Both cg-diff and cg-log get:

- A common infrastructure for option parsing, that allows for 
combinations of options like all getopt-using programs. So you can say:

cg-log -cfm
cg-diff foo --color
cg-log -sfrlinus foobar

At the same time, you get decent error reporting on illegal options.

- A common infrastructure for colorization. cg-log and cg-diff share 
setup, and sed scripts for colorization.

- diffstat (or rather, git-apply --stat) support.

- Support for the new -M, -C and -B switches to the git-diff-* brothers.

- Automatic search in less, so you can jump to the next commit/diff 
chunk by "n".

- Automatic color if the COGITO_AUTO_COLOR environment variable is set.

- "Smart pager" support - less isn't invoked unless there's actually 
some output. This is useful is COGITO_AUTO_COLOR is set.

cg-log also gets:

- Vast speedup. It uses git-rev-list and git-diff-tree to do most of the 
heavy lifting.

- A new default "-f" format, that allows deletions, renames etc. to be 
shown (the old format is still available as -F). Deletions and new files 
are color-coded.

- Diff output. cg-log -p shows diff output between commits. Colorized as 
in cg-diff.

- New, more compact summary, that's readable on 80-column terminals. By
default, sha1's are hidden, and the date is more compact (and readable). 
It can also be combined with the other options: for example "cg-log -sf" 
gives a nice overview of commits and the files they touch.

- Slightly new behaviour, thanks to use of git-diff-tree: when you use 
any of the options that shows differences between revisions, or that 
gives a subset of revisions, merge commits are hidden by default. They 
are visible if the "-a/--all" option is given.

- The default log format is also shorter. The full version is available 
with "-v". An even shorter format is available with "-q".

- Selection of ranges by date or maximum number of commits to show.