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Favor GITHUB_WORKFLOW_REF over using actions: read to calculate the workflow path #2126

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@jsoref jsoref commented Feb 9, 2024

Introduced with GHES 3.9:
https://docs.github.com/en/enterprise-server@3.9/actions/learn-github-actions/variables

GITHUB_WORKFLOW_REF means that actions don't need to use actions: read to determine the path to the running workflow.

This should address the problem in #2117 as long as the user is running on GHES 3.9+ (including GHEC).

It doesn't precisely fix the issue because someone running on GHES 3.8 will still need to add actions: read until #2121 makes that code path non fatal.

Note that these aren't mutually exclusive PRs (although as they both impact the changelog, they will conflict there...) -- both changes should be applied -- this simplifies the general logic for the average user (and once GHES 3.8 is sunset, the other code path should be removed entirely).

Merge / deployment checklist

  • Confirm this change is backwards compatible with existing workflows.
  • Confirm the readme has been updated if necessary.
  • Confirm the changelog has been updated if necessary.

@jsoref jsoref requested a review from a team as a code owner February 9, 2024 04:47
@SPodjasek
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I can confirm that this fixes my issue from #2117 without the need to declare actions: read permission:

diff --git a/.github/workflows/local-cd.yml b/.github/workflows/local-cd.yml
index c6bf452..ee11bac 100644
--- a/.github/workflows/local-cd.yml
+++ b/.github/workflows/local-cd.yml
@@ -236,7 +236,6 @@ jobs:
     runs-on: ubuntu-latest
     needs: build-and-publish
     permissions:
-      actions: read
       contents: read
       packages: read
       pull-requests: write
@@ -282,7 +281,8 @@ jobs:
         id: upload-sarif
         continue-on-error: true
         if: hashFiles('sarif.output.json') != '' && github.event_name != 'pull_request_target'
-        uses: github/codeql-action/upload-sarif@main
+        uses: jsoref/github-codeql-action/upload-sarif@favor-workflow-ref
         with:
           sarif_file: sarif.output.json

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@angelapwen angelapwen left a comment

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This looks good to me ✨ just a few documentation suggestions, and the changelog merge conflict will need to be addressed of course!

CHANGELOG.md Outdated Show resolved Hide resolved
src/api-client.ts Outdated Show resolved Hide resolved
src/api-client.ts Fixed Show resolved Hide resolved
@jsoref jsoref force-pushed the favor-workflow-ref branch 2 times, most recently from f8bd51a to b66391a Compare February 13, 2024 14:39
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@angelapwen angelapwen left a comment

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I had been planning to test something off of your forkmyself, but I haven't had time to in the last few days so I thought I'd ask if you were willing to test it and link the runs after testing 😄

We'd like to make sure that for reusable workflows, the workflow path we originally got from the API is definitely the same as the one we're getting from GITHUB_WORKFLOW_REF. Basically, if they're not the same, alert categories will change after this change. They should be the same, but we'd like to be certain 😸

CHANGELOG.md Outdated Show resolved Hide resolved
@@ -119,6 +119,18 @@
* Get the path of the currently executing workflow relative to the repository root.
*/
export async function getWorkflowRelativePath(): Promise<string> {
const workflow_ref = process.env["GITHUB_WORKFLOW_REF"];

Check warning

Code scanning / CodeQL

Some environment variables may not exist in default setup workflows

The environment variable GITHUB_WORKFLOW_REF may not exist in default setup workflows. If all uses are safe, add it to the list of environment variables that are known to be safe in 'queries/default-setup-environment-variables.ql'. If this use is safe but others are not, dismiss this alert as a false positive.
Introduced with GHES 3.9:
https://docs.github.com/en/enterprise-server@3.9/actions/learn-github-actions/variables

GITHUB_WORKFLOW_REF means that actions don't need to use `actions: read`
to determine the path to the running workflow.
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jsoref commented Feb 16, 2024

@angelapwen: um, if someone gave me a workflow, I'm open to running it.

I haven't managed to get reusable workflows to do anything particularly useful for me, so I don't generally use them myself (I think there are some reusable workflows somewhere in one of the codeql repositories) -- mostly they've made me dizzy (I tried to figure out a way to set up a reusable workflow for check-spelling, and it didn't seem to add any value).

I have very little time tomorrow and won't have time until Tuesday (Monday's a holiday in Canada). I expect to be moderately busy next week, but I can generally run commands if people provide them.

(Sorry, I have no idea how/why I missed your event this morning...)

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3 participants