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git/contrib/examples/git-whatchanged.sh
Junio C Hamano 627a8b8dcd core-tutorial: trim the section on Inspecting Changes
Back when the core tutorial was written, `log` and `whatchanged`
were scripted Porcelains.  In the "Inspecting Changes" section that
talks about the plumbing commands in the diff family, it made sense
to use `log` and `whatchanged` as good examples of the use of these
plumbing commands, and because even these scripted Porcelains were
novelty (there wasn't the new end-user tutorial written), it made
some sense to illustrate uses of the `git log` (and `git
whatchanged`) scripted Porcelain commands.

But we no longer have scripted `log` and `whatchanged` to serve as
examples, and this document is not where the end users learn what
`git log` command is about.  Stop at briefly mentioning the
possibility of combining rev-list with diff-tree to build your own
log, and leave the end-user documentation of `log` to the new
tutorial and the user manual.

Also resurrect the last version of `git-log`, `git-whatchanged`, and
`git-show` to serve as examples to contrib/examples/ directory.

While at it, remove 'whatchanged' from a list of sample commands
that are affected by GIT_FLUSH environment variable. This is not
meant to be an exhaustive list but as a list of typical ones, and an
old command that is kept primarily for backward compatibility does
not belong to it.

Helped-by: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-08-13 09:01:52 -07:00

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#!/bin/sh
USAGE='[-p] [--max-count=<n>] [<since>..<limit>] [--pretty=<format>] [-m] [git-diff-tree options] [git-rev-list options]'
SUBDIRECTORY_OK='Yes'
. git-sh-setup
diff_tree_flags=$(git-rev-parse --sq --no-revs --flags "$@") || exit
case "$0" in
*whatchanged)
count=
test -z "$diff_tree_flags" &&
diff_tree_flags=$(git-repo-config --get whatchanged.difftree)
diff_tree_default_flags='-c -M --abbrev' ;;
*show)
count=-n1
test -z "$diff_tree_flags" &&
diff_tree_flags=$(git-repo-config --get show.difftree)
diff_tree_default_flags='--cc --always' ;;
esac
test -z "$diff_tree_flags" &&
diff_tree_flags="$diff_tree_default_flags"
rev_list_args=$(git-rev-parse --sq --default HEAD --revs-only "$@") &&
diff_tree_args=$(git-rev-parse --sq --no-revs --no-flags "$@") &&
eval "git-rev-list $count $rev_list_args" |
eval "git-diff-tree --stdin --pretty -r $diff_tree_flags $diff_tree_args" |
LESS="$LESS -S" ${PAGER:-less}