gn.py: Could not find checkout in any parent of the current path. This must be run inside a checkout.

[leona...@google.com]

What should I do to run gn? I keep running into this error. I followed the 2 steps on the setup page

```

$ git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git

$ $ export PATH=$PATH:/path/to/depot_tools

```

But get this error when running `gn`

```

gn.py: Could not find checkout in any parent of the current path.

This must be run inside a checkout.

```

I'm running it inside the cloned depot_tools directory and tried running `git checkout` but still can't seem to run gn.

[Dirk Pranke]

gn.py assumes that you have a chromium checkout (or v8 or one of a few other projects) where you have a copy of the "buildtools" repo checked out and you can find .../buildtools/{arch}/gn{.exe}.

depot_tools itself does not have that repo, and so you don't yet have an actual copy of GN to use.

-- Dirk

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[jam lee]

fetch v8

cd v8 ;tar -cvf buildtools.tar buildtools/ cd mydemo; cp ../../v8/v8/buildtools.tar . tar -cvf buildtools.tar buildtools/ gn gen out