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A program which ensures source code files have copyright license headers by scanning directory patterns recursively

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addlicense

The program ensures source code files have copyright license headers by scanning directory patterns recursively.

It modifies all source files in place and avoids adding a license header to any file that already has one.

addlicense requires go 1.16 or later.

install

go install github.com/google/addlicense@latest

usage

addlicense [flags] pattern [pattern ...]

-c copyright holder (defaults to "Google LLC")
-f custom license file (no default)
-l license type: apache, bsd, mit, mpl (defaults to "apache")
-y year (defaults to current year)
-check check only mode: verify presence of license headers and exit with non-zero code if missing
-ignore file patterns to ignore, for example: -ignore **/*.go -ignore vendor/**

The pattern argument can be provided multiple times, and may also refer to single files.

The -ignore flag can use any pattern supported by doublestar.

Running in a Docker Container

The simplest way to get the addlicense docker image is to pull from GitHub Container Registry:

docker pull ghcr.io/google/addlicense:latest

Alternately, you can build it from source yourself:

docker build -t ghcr.io/google/addlicense .

Once you have the image, you can test that it works by running:

docker run -it ghcr.io/google/addlicense -h

Finally, to run it, mount the directory you want to scan to /src and pass the appropriate addlicense flags:

docker run -it ghcr.io/google/addlicense -v ${PWD}:/src -c "Google LLC" *.go

license

Apache 2.0

This is not an official Google product.

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A program which ensures source code files have copyright license headers by scanning directory patterns recursively

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