|author||Bruce Dawson <email@example.com>||Wed Jan 06 20:46:58 2021 -1000|
|committer||Commit Bot <firstname.lastname@example.org>||Thu Jan 07 20:24:50 2021 +0000|
Find python/python3 from dotfile entries This is the third (and final?) step in getting gn to properly find Python3 on Windows. The first attempt got it to translate python3.bat. The second attempt added the ability to handle python3. This change adds support for the directive being in the dotfile. This is all in aid of moving Chromium (and any other projects using gn) to Python 3. This has been tested with the recently reverted dotfile change in Chromium (crrev.com/c/2591588) and it successfully did an otherwise- failing "gn gen" and a chrome build is succeeding. It was also tested with "gn gen out\arg --script-executable=python3" and this worked. Change-Id: I7449a989d488dd107929e997a5e7d21daadd9757 Reviewed-on: https://gn-review.googlesource.com/c/gn/+/10900 Reviewed-by: Brett Wilson <email@example.com> Commit-Queue: Brett Wilson <firstname.lastname@example.org>
GN is a meta-build system that generates build files for Ninja.
Alternatively, you can build GN from source:
git clone https://gn.googlesource.com/gn cd gn python build/gen.py ninja -C out # To run tests: out/gn_unittests
On Windows, it is expected that
lib.exe can be found in
PATH, so you'll want to run from a Visual Studio command prompt, or similar.
On Linux and Mac, the default compiler is
clang++, a recent version is expected to be found in
PATH. This can be overridden by setting
There is a simple example in examples/simple_build directory that is a good place to get started with the minimal configuration.
To build and run the simple example with the default gcc compiler:
cd examples/simple_build ../../out/gn gen -C out ninja -C out ./out/hello
For a maximal configuration see the Chromium setup:
and the Fuchsia setup:
If you find a bug, you can see if it is known or report it in the bug database.
GN uses Gerrit for code review. The short version of how to patch is:
Register at https://gn-review.googlesource.com. ... edit code ... ninja -C out && out/gn_unittests
Then, to upload a change for review:
git commit git push origin HEAD:refs/for/master
The first time you do this you'll get an error from the server about a missing change-ID. Follow the directions in the error message to install the change-ID hook and run
git commit --amend to apply the hook to the current commit.
When revising a change, use:
git commit --amend git push origin HEAD:refs/for/master
which will add the new changes to the existing code review, rather than creating a new one.
We ask that all contributors sign Google's Contributor License Agreement (either individual or corporate as appropriate, select ‘any other Google project’).
You may ask questions and follow along with GN‘s development on Chromium’s gn-dev@ Google Group.