Add "ninja show" and "ninja refresh" targets to GN build.

Add "ninja show" and "ninja refresh" targets to GN build.

"ninja show" will print out the build arguments for when you can't remember the configuration of your output directory.

"ninja refresh" ignores dependencies and regenerates the ninja files.

R=scottmg@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=236840

[scottmg, 2013-11-22 20:53:21]

https://codereview.chromium.org/82923005/diff/1/tools/gn/ninja_build_writer.cc
File tools/gn/ninja_build_writer.cc (right):

https://codereview.chromium.org/82923005/diff/1/tools/gn/ninja_build_writer.c...
tools/gn/ninja_build_writer.cc:145: out_ << "\nbuild refresh: gn\n";
This would break if there was a file named "refresh" in the directory. :)

I think you want "build refresh: phony gn"?

https://codereview.chromium.org/82923005/diff/1/tools/gn/ninja_build_writer.c...
tools/gn/ninja_build_writer.cc:148: // This will be "ninja show" and will show
up like:
missing example in comment

[brettw, 2013-11-22 21:20:31]

I fixed the comment. I did not change the build names. "ninja foo" will always
conflict with a file named "foo". I'm not so worried about us adding "show" and
"refresh" targets.

[scottmg, 2013-11-22 21:23:38]

ok, lgtm

[brettw, 2013-11-22 22:14:03]

Committed patchset #2 manually as r236840 (presubmit successful).