Integrate go-licenses to provides licenses of used libraries about goreleaser

[caarlos0]

all that being said, I don't think we need to hard-integrate goreleaser with go-licenses... it's already possible to use it.

thanks for the issue, though!

[caarlos0]

you could run it in a before hook, and then archive the folder to add to the release...

e.g.:

# .goreleaser.yml
before:
  hooks:
    - go run github.com/google/go-licenses@latest save . --save_path="licenses"

archives:
  - id: default
    # ...
    files:
      # add to the default release archives
      - ./licenses
  # create an archive with licenses only
  - id: licenses
    name_template: licenses
    format: tar.gz
    meta: true
    files:
      - ./licenses

this should add a licenses.tar.gz to the release artifacts...

if you want to add to the regular release archive, just add the ./dist/licenses to its files section...

you might need to add the licenses folder to the gitignore though

[caarlos0]

just tried it here, fwiw:

patch on goreleaser's own .goreleaser.yml

diff --git a/.goreleaser.yaml b/.goreleaser.yaml
index 6559a447..ecb542e5 100644
--- a/.goreleaser.yaml
+++ b/.goreleaser.yaml
@@ -10,6 +10,7 @@ before:
     - go mod tidy
     - ./scripts/completions.sh
     - ./scripts/manpages.sh
+    - go run github.com/google/go-licenses@latest save . --save_path="licenses"
 
 snapshot:
   name_template: "{{ incpatch .Version }}-next"
@@ -182,6 +183,13 @@ archives:
       - LICENSE.md
       - completions/*
       - manpages/*
+      - licenses
+  - id: licenses
+    name_template: licenses
+    format: tar.gz
+    meta: true
+    files:
+      - licenses
 
 brews:
   - repository:

files after running goreleaser release --snapshot --clean

$ ls -1 dist/*.tar.gz
dist/goreleaser_Darwin_all.tar.gz
dist/goreleaser_Darwin_arm64.tar.gz
dist/goreleaser_Darwin_x86_64.tar.gz
dist/goreleaser_Linux_arm64.tar.gz
dist/goreleaser_Linux_armv7.tar.gz
dist/goreleaser_Linux_i386.tar.gz
dist/goreleaser_Linux_ppc64.tar.gz
dist/goreleaser_Linux_x86_64.tar.gz
dist/licenses.tar.gz

$ tar tvf dist/goreleaser_Linux_i386.tar.gz | grep licenses | wc -l
1375