patman: Fix indentation in terminal.py

This code came from a different project with 2-character indentation. Fix
it for U-Boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
patman: Correct unit tests to run correctly

It seems that doctest behaves differently now, and some of the unit tests
do not run. Adjust the tests to work correctly.

 ./tools/patman/patman --test
<unittest.result.TestResult run=10 errors=0 failures=0>

Signed-off-by: Simon Glass <sjg@chromium.org>
patman: Remove the -a option

It seems that this is no longer needed, since checkpatch.pl will catch
whitespace problems in patches. Also the option is not widely used, so
it seems safe to just remove it.

Suggested-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
patman: Use --no-pager' to stop git from forking a pager

In a headless environment the pager can apparently hang. We don't want a
pager anyway so let's request that none be used.

Reported-by: Tom Rini <trini@ti.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
patman: Avoid changing the order of tags

patman collects tags that it sees in the commit and places them nicely
sorted at the end of the patch. However, this is not really necessary and
in fact is apparently not desirable.

Suggested-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
buildman: Set the return code to indicate build result

When buildman finds errors/warnings when building, set the return code to
indicate this.

Suggested-by: York Sun <yorksun@freescale.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
buildman: Allow make-flags variables to include '-' and '_'

These characters are commonly used in variables, so permit them. Also
document the permitted characters.

Reported-by: Tom Rini <trini@ti.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
buildman: Implement an option to exclude boards from the build

Some boards are known to be broken and it is convenient to be able to
exclude them from the build.

Add an --exclude option to specific boards to exclude. This uses the
same matching rules as the normal 'include' arguments, and is a comma-
separated list of regular expressions.

Suggested-by: York Sun <yorksun@freescale.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
buildman: Remove the directory prefix from each error line

The full path is long and also includes buildman private directories.
Clean this up, so that only a relative U-Boot path is shown.

This will change warnings like these:

/home/sjg/c/src/third_party/u-boot/buildman5/.bm-work/00/arch/sandbox/cpu/cpu.c: In function 'timer_get_us':
/home/sjg/c/src/third_party/u-boot/buildman5/.bm-work/00/arch/sandbox/cpu/cpu.c:40:9: warning: unused variable 'i' [-Wunused-variable]

/home/sjg/c/src/third_party/u-boot/files/arch/sandbox/cpu/cpu.c: In function 'timer_get_us':
/home/sjg/c/src/third_party/u-boot/files/arch/sandbox/cpu/cpu.c:40:9: warning: unused variable 'i' [-Wunused-variable]

to:

arch/sandbox/cpu/cpu.c: In function 'timer_get_us':
arch/sandbox/cpu/cpu.c:40:9: warning: unused variable 'i' [-Wunused-variable]

Signed-off-by: Simon Glass <sjg@chromium.org>
buildman: Add an option to show which boards caused which errors

Add a -l option to display a list of offending boards against each
error/warning line. The information will be shown in brackets as below:

02: wip
   sandbox: +   sandbox
       arm: +   seaboard
+(sandbox) arch/sandbox/cpu/cpu.c: In function 'timer_get_us':
+(sandbox) arch/sandbox/cpu/cpu.c:40:9: warning: unused variable 'i' [-Wunused-variable]
+(seaboard) board/nvidia/seaboard/seaboard.c: In function 'pin_mux_mmc':
+(seaboard) board/nvidia/seaboard/seaboard.c:36:9: warning: unused variable 'fred' [-Wunused-variable]
+(seaboard)      int fred;
+(seaboard)          ^

Signed-off-by: Simon Glass <sjg@chromium.org>
buildman: Separate out display of warnings and errors

Some boards unfortunately build with warnings and it is useful to be able
to easily distinguish the warnings from the errors.

Use a simple pattern match to categorise gcc output into warnings and
errors, and display each separately. New warnings are shown in magenta (with
a w+ prefix) and fixed warnings are shown in yellow with a w- prefix.

Signed-off-by: Simon Glass <sjg@chromium.org>
patman: Fix detection of git version

A missing 'global' declaration means that this feature does not currently
work. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>