Implement "tg summary --deps" as a shell function.

This avoids running "$tg summary --deps" from all commands that need
that information internally.

Signed-off-by: Per Cederqvist <ceder@lysator.liu.se>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Indicate the current branch in "tg summary --graphviz"

Give the current branch a yellow background in the output of
"tg summary --graphviz".

Signed-off-by: Per Cederqvist <ceder@lysator.liu.se>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Add pointer about the problems regarding tg depend rm to README

Signed-off-by: Olaf Dabrunz <odabrunz@gmx.net>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Let tg-update take a branch parameter

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
tg-remote: use default remote if none is given

This is useful if the remote has new topics and you need to populate the local
top-bases.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
put die() messages to stderr

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
tg-log: short cut to git log

A short cut to show the history of a named topgit branch.  Additional options
to git log can be given after a '--'.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
README: move note about shortcomings of using --first-parent from tg base to tg log

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
tg.sh: simplify cat_file

Use shell parameter expansion to strip the leading (w): and (i)

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
hooks/pre-commit: check .top* files in the to-be-commited tree

We currently check fo these files only in the working tree. But we should check
what would be commited. We use write-tree to be able to utilize ls-tree and
check the result.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
hooks/pre-commit: check for cycles in dependencies

We need only to consider newly added dependencies.  For each of these deps we
need to check if there is a path from this dep to the current HEAD.

We use recursive_dep() for this task.  Even if recursive_dep() uses a DFS
traversal it will not run into an endless loop if there would be a cycle,
because recursive_dep() takes .topdeps only from committed trees.  And we
require that the committed dependency graph has no cycles.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
hooks/pre-commit: check .topdeps for valid branches

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
hooks/pre-commit: check for deps repetitions

A dep should only be listed once in .topdeps, force this.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Merge commit 'refs/top-bases/t/summary-deps-as-function' into t/summary-deps-as-function

Conflicts:
	tg-summary.sh
	tg.sh
tg-files: list files changed by the topic branch

this could also be a --name-only option to tg-patch. But I like the
similarity to 'quilt files'.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
README: clearify note describing short-comings of tg log

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
provide a global temporary directory

The standard procedure 'tmp=mktemp; trap "rm $tmp" 0' was broken with the
introduction of the pager. Which overwrites the trap itself to close and
remove the pager fifo.

Now tg provides a temp playground and all other temp files should be created
inside this directory and only this directory will be removed with the exit
trap. setup_pager still overwrites the trap, but keeps the rm command from
the global temp directory. To simplify this the new function get_temp() is
provided.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
cat_file: take -i/-w parameters

This changes the way how cat_file selects the source of the file. It
accepts an optional parameter which is either -i or -w and will react on this
instead of the branch name. tg-patch is updated accordingly and can now
accepts the current branch name as argument with -i or -w given.

cat_file was also broken for the worktree case when we are not in the top level.

Also, tg-patch allowed to be on the top-base branch, but -i and -w doesn't
make sense there too.

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
tg-export: use pretty_tree -b for base

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>
tg-files: simplify arg checking and add sanity check for -i/-w

Signed-off-by: Bert Wesarg <bert.wesarg@googlemail.com>