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Adam Simpkins authored
Summary: This updates fbcode_builder to try and automatically detect the current repository's project name by looking for a `.projectid` file in the repository root. If the project name can be detected: - The current repository will automatically be used as the source directory for this project (instead of fetching the sources into the scratch directory). - If an explicit project name was not specified on the command line, the current project will be built by default. This also changes the repository detection logic to use the current working directory, rather than the directory where the fbcode_builder code lives. This will allow this logic to work even if we move fbcode_builder into its own repository in the future, and have projects depend on it using git submodules. This does mean that callers need to invoke fbcode_builder.py from inside the repository. Reviewed By: wez Differential Revision: D17088938 fbshipit-source-id: f14d28fdcfaa330ff837ea52b8bdd4e358b81c61
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