[chromium-dev] GN copy maintaining directory structure ("cp -r")

[brian.armstrong via Chromium-dev]

Hello,

Is it feasible to use a copy() step in GN to copy the outputs from another
step to a new directory, but maintaining directory structure relative to
some part of the source directory? E.g., can I copy
/build/gen/blah/foo/bar/baz to /build/dest/foo/bar/baz and
/build/gen/blah/foo/bar/qux/quux to /build/dest/foo/bar/qux/quux? I thought
the answer might involve rebase_path, but no incantation I can come up with
seems to do this, and I've tried quite a few now.

Thanks!
Brian

[Nico Weber]

GN's copy() step being able to copy directories is considered a bug.
https://crbug.com/855747 has some words on why. So you shouldn't try and
use it for this purpose.

On Mon, Dec 3, 2018 at 8:22 PM brian.armstrong via Chromium-dev <

Post by brian.armstrong via Chromium-dev
Hello,
Is it feasible to use a copy() step in GN to copy the outputs from another
step to a new directory, but maintaining directory structure relative to
some part of the source directory? E.g., can I copy
/build/gen/blah/foo/bar/baz to /build/dest/foo/bar/baz and
/build/gen/blah/foo/bar/qux/quux to /build/dest/foo/bar/qux/quux? I thought
the answer might involve rebase_path, but no incantation I can come up with
seems to do this, and I've tried quite a few now.
Thanks!
Brian
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['Brian Armstrong' via Chromium-dev]

I should have clarified, I have all the source files from
get_target_outputs(), and I'm looking to transform the outputs according to
this strategy, so it's not a blind recursive copy.

Post by Nico Weber
GN's copy() step being able to copy directories is considered a bug.
https://crbug.com/855747 has some words on why. So you shouldn't try and
use it for this purpose.
On Mon, Dec 3, 2018 at 8:22 PM brian.armstrong via Chromium-dev <

Post by brian.armstrong via Chromium-dev
Hello,
Is it feasible to use a copy() step in GN to copy the outputs from
another step to a new directory, but maintaining directory structure
relative to some part of the source directory? E.g., can I copy
/build/gen/blah/foo/bar/baz to /build/dest/foo/bar/baz and
/build/gen/blah/foo/bar/qux/quux to /build/dest/foo/bar/qux/quux? I thought
the answer might involve rebase_path, but no incantation I can come up with
seems to do this, and I've tried quite a few now.
Thanks!
Brian
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[Mike Dougherty]

The "copy" used here[1] might be useful. (Note the .framework is a
directory.)

1:
https://cs.chromium.org/chromium/src/ios/web_view/BUILD.gn?q=ios_web_view_package_copy&g=0&l=533


On Mon, Dec 3, 2018 at 5:29 PM 'Brian Armstrong' via Chromium-dev <

Post by 'Brian Armstrong' via Chromium-dev
I should have clarified, I have all the source files from
get_target_outputs(), and I'm looking to transform the outputs according to
this strategy, so it's not a blind recursive copy.

Post by Nico Weber
GN's copy() step being able to copy directories is considered a bug.
https://crbug.com/855747 has some words on why. So you shouldn't try and
use it for this purpose.
On Mon, Dec 3, 2018 at 8:22 PM brian.armstrong via Chromium-dev <

Post by brian.armstrong via Chromium-dev
Hello,
Is it feasible to use a copy() step in GN to copy the outputs from
another step to a new directory, but maintaining directory structure
relative to some part of the source directory? E.g., can I copy
/build/gen/blah/foo/bar/baz to /build/dest/foo/bar/baz and
/build/gen/blah/foo/bar/qux/quux to /build/dest/foo/bar/qux/quux? I thought
the answer might involve rebase_path, but no incantation I can come up with
seems to do this, and I've tried quite a few now.
Thanks!
Brian
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