feat(action): allow configuring the github token and set it when it exists (#34)

* fix: set Bearer token in curl request when GITHUB_TOKEN is set

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: use a dedicated input variable to pass github token

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* fix: use github_token inputs

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>

* Update README.md

* Update README.md

---------

Signed-off-by: Ludovic Ortega <ludovic.ortega@adminafk.fr>
Co-authored-by: Orhun Parmaksız <orhunparmaksiz@gmail.com>

README.md

@@ -9,6 +9,7 @@ This action generates a changelog based on your Git history using [git-cliff](ht
 - `version`: `git-cliff` version to use. (e.g. `"latest"`, `"v2.5.0"`)
 - `config`: Path of the configuration file. (Default: `"cliff.toml"`)
 - `args`: [Arguments](https://github.com/orhun/git-cliff#usage) to pass to git-cliff. (Default: `"-v"`)
+- `github_token`: The GitHub API token used to get `git-cliff` release information via the GitHub API to avoid rate limits. (Default: `${{ github.token }}`)
 
 ### Output variables
 
@@ -32,6 +33,13 @@ This action generates a changelog based on your Git history using [git-cliff](ht
 >
 > Otherwise, you might end up getting empty changelogs or `git ref` errors depending on arguments passed to `git-cliff`.
 
+### Running the action outside of GitHub
+
+If you run the action in Gitea or GitHub Enterprise, the `github_token` input is invalid. You have two options:
+
+- Pass an empty value (`github_token: ""`) (limit of 60 requests per hour per IP address).
+- Create a GitHub token and pass it through GitHub secrets to avoid rate limiting.
+
 ### Examples
 
 #### Simple

action.yml

@@ -13,6 +13,10 @@ inputs:
     description: "git-cliff arguments"
     required: false
     default: "-v"
+  github_token:
+    description: "GitHub API token"
+    required: false
+    default: "${{ github.token }}"
 outputs:
   changelog:
     description: "output file"
@@ -33,7 +37,7 @@ runs:
         RUNNER_OS: ${{ runner.os }}
         RUNNER_ARCH: ${{ runner.arch }}
         VERSION: ${{ inputs.version }}
-        GITHUB_TOKEN: ${{ github.token }}
+        GITHUB_API_TOKEN: ${{ inputs.github_token }}
 
     - name: Run git-cliff
       id: run-git-cliff

install.sh

@@ -19,14 +19,21 @@ if [[ "${VERSION}" != 'latest' ]]; then
     RELEASE_URL="https://api.github.com/repos/orhun/git-cliff/releases/tags/${VERSION}"
 fi
 
+# Caching is disabled in order not to receive stale responses from Varnish cache fronting GitHub API.
+if [[ -z "${GITHUB_API_TOKEN}" ]]; then
+    RELEASE_INFO="$(curl --silent --show-error --fail \
+        --header 'Cache-Control: no-cache, must-revalidate' \
+        "${RELEASE_URL}")"
+else
     # Although releases endpoint is available without authentication, the current github.token is still passed
     # in order to increase the limit of 60 requests per hour per IP address to a higher value that's also counted
     # per GitHub account.
-# Caching is disabled in order not to receive stale responses from Varnish cache fronting GitHub API.
     RELEASE_INFO="$(curl --silent --show-error --fail \
-    --header "authorization: Bearer ${GITHUB_TOKEN}" \
+        --header "authorization: Bearer ${GITHUB_API_TOKEN}" \
         --header 'Cache-Control: no-cache, must-revalidate' \
         "${RELEASE_URL}")"
+fi
+
 TAG_NAME="$(echo "${RELEASE_INFO}" | jq --raw-output ".tag_name")"
 TARGET="git-cliff-${TAG_NAME:1}-${ARCH}-${OS}.tar.gz"
 LOCATION="$(echo "${RELEASE_INFO}" \