Always use api.github.com to determine latest PMD version (#175)

Fixes #173

README.md

@@ -76,7 +76,7 @@ See also [Uploading a SARIF file to GitHub](https://docs.github.com/en/code-secu
 
 |input       |required|default|description|
 |------------|---|--------|---------------|
-|`token`     |no |"github.token"|Personal access token (PAT) used to query the latest PMD release and the download URL for PMD.<br>By default the automatic token for GitHub Actions is used.<br>[Learn more about automatic token authentication](https://docs.github.com/en/actions/security-guides/automatic-token-authentication)<br>[Learn more about creating and using encrypted secrets](https://docs.github.com/en/actions/security-guides/encrypted-secrets)|
+|`token`     |no |"github.token"|Personal access token (PAT) used to query the latest PMD release via api.github.com and to determine the modified files of a push/pull request (see option "analyzeModifiedFilesOnly").<br>By default the automatic token for GitHub Actions is used.<br>If this action is used in GHES environment (e.g. the baseUrl is not "api.github.com"), then the token is only used for querying the modified files of a push/pull request. The token won't be used to query the latest PMD release.<br>[Learn more about automatic token authentication](https://docs.github.com/en/actions/security-guides/automatic-token-authentication)<br>[Learn more about creating and using encrypted secrets](https://docs.github.com/en/actions/security-guides/encrypted-secrets)|
 |`version`   |no |"latest"|PMD version to use. Using "latest" automatically downloads the latest version.<br>Available versions: <https://github.com/pmd/pmd/releases><br>Note: Only PMD 6.31.0 and later is supported due to required support for [Sarif report format](https://pmd.github.io/latest/pmd_userdocs_report_formats.html#sarif).|
 |`sourcePath`|no |"."     |Root directory for sources. Uses by default the current directory|
 |`rulesets`  |yes|        |Comma separated list of ruleset names to use.|

dist/licenses.txt

@@ -206,6 +206,17 @@ The above copyright notice and this permission notice (including the next paragr
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
+@octokit/plugin-request-log
+MIT
+MIT License Copyright (c) 2020 Octokit contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice (including the next paragraph) shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
 @octokit/plugin-rest-endpoint-methods
 MIT
 MIT License Copyright (c) 2019 Octokit contributors
@@ -267,6 +278,32 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 
 
+@octokit/rest
+MIT
+The MIT License
+
+Copyright (c) 2012 Cloud9 IDE, Inc. (Mike de Boer)
+Copyright (c) 2017-2018 Octokit contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+
 @vercel/ncc
 MIT
 Copyright 2018 ZEIT, Inc.

lib/util.js

@@ -1,11 +1,13 @@
 const core = require('@actions/core');
 const github = require('@actions/github');
+const github_defaults = require('@actions/github/lib/utils').defaults;
 const tc = require('@actions/tool-cache');
 const exec = require('@actions/exec');
 const semver = require('semver');
 const os = require('os');
 const fs = require('fs').promises;
 const path = require('path');
+const { Octokit } = require('@octokit/rest');
 
 // Load at most MAX_PAGE pages when determining modified files.
 // This is used both for pull/{pull_number}/files as well as for
@@ -69,7 +71,21 @@ function useNewArgsFormat(pmdVersion) {
 
 async function determinePmdRelease(pmdVersion, token) {
     core.debug(`determine release info for ${pmdVersion}`);
-    const octokit = github.getOctokit(token);
+
+
+    const PUBLIC_GITHUB_API_URL = 'https://api.github.com';
+    let octokit;
+    if (github_defaults.baseUrl === PUBLIC_GITHUB_API_URL) {
+        // only use authenticated token, if on public github and not on a custom GHES instance
+        octokit = github.getOctokit(token);
+        core.debug(`Using token to access repos/pmd/pmd/releases/latest on ${github_defaults.baseUrl}`);
+    } else {
+        // explicitly overwrite base url to be public github api, as pmd/pmd is only available there
+        // not using the token, as that would only be valid for GHES
+        octokit = new Octokit({ baseUrl: PUBLIC_GITHUB_API_URL });
+        core.debug(`Not using token to access repos/pmd/pmd/releases/latest on ${PUBLIC_GITHUB_API_URL}, as token is for ${github_defaults.baseUrl}`);
+    }
+
     let release;
     if (pmdVersion === 'latest') {
         release = await octokit.rest.repos.getLatestRelease({