commit cec8033cd401f103b8b35f9903402a6612fc0e5a
author Michael Spang <spang@google.com> Wed Nov 15 21:35:54 2023 +0000
committer CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com> Wed Nov 15 21:35:54 2023 +0000
tree 219968aea7a2f9031afb5cbd37b8de9de68a4e9f
parent 4c617fd25a8796bfe5fa61a4365d2dd1cadb5b7c

pw_env_setup: Make pigweed_environment.gni content gni-relative

This is useful for Matter which tries to reuse a single environment
between multiple GN roots. The path is ambiguous if specified relative
to GN root, but is unambiguous if specified relative to the gni file.

The paths are turned back into "source absolute paths" via
get_path_info, so the variables actually have the same value as before
whenever the gni file is loaded from //build_overrides/.

However, if the gni file is imported indirectly from e.g.
//third_party/connectedhomeip/build_overrides, as the Matter sample
projects do, then the environment will be at
//third_party/connectedhomeip/.environment, which is the correct
location.

(Contrary to what it may seem, get_path_info(path, "abspath") outputs a
path relative to the GN --root, i.e. exactly what was in this file
before. So the change should be safe for pigweed & its other users).

Change-Id: I48f85d81ca1cedd05d0a2711420f5e4c9a1e7a37
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/180991
Reviewed-by: Armando Montanez <amontanez@google.com>
Commit-Queue: Michael Spang <spang@google.com>