.github/workflows/01-make-dist.yml: there is no env.GITHUB_HEAD_REF [#1400]

Signed-off-by: Jim Klimov <jimklimov+nut@gmail.com>

Author: jimklimov

.github/workflows/01-make-dist.yml

@@ -37,6 +37,14 @@ jobs:
     - name: Checkout repository
       uses: actions/checkout@v3
 
+    # https://github.com/marketplace/actions/substitute-string
+    - uses: bluwy/substitute-string-action@v3
+      id: subst-github-ref-name
+      with:
+       _input-text: "${{ github.ref_name }}"
+       " ": _
+       "/": _
+
     # Using hints from https://askubuntu.com/questions/272248/processing-triggers-for-man-db
     # and our own docs/config-prereqs.txt
     # NOTE: Currently installing the MAX prerequisite footprint,
@@ -168,7 +176,7 @@ jobs:
     # We may want another script block (after this cleanup of obsolete data)
     # to iterate clearing the way build by build until there's X MB available
     # (at least 12MB as of Nov 2025).
-    - if: env.GITHUB_REF_TYPE != 'tag' && env.GITHUB_HEAD_REF != 'master'
+    - if: env.GITHUB_REF_TYPE != 'tag' && steps.subst-github-ref.outputs.result != 'master'
       name: Delete Old Artifacts for this feature branch/PR
       uses: actions/github-script@v6
       id: artifact
@@ -180,7 +188,7 @@ jobs:
           })
 
           res.data.artifacts
-            .filter(({ name }) => name === 'tarballs-${{ env.GITHUB_HEAD_REF }}')
+            .filter(({ name }) => name === 'tarballs-${{ steps.subst-github-ref.outputs.result }}')
             .forEach(({ id }) => {
               github.rest.actions.deleteArtifact({
                 owner: context.repo.owner,
@@ -192,7 +200,7 @@ jobs:
     - name: Upload tarball and its checksum artifacts
       uses: actions/upload-artifact@v4
       with:
-        name: tarballs-${{ env.GITHUB_HEAD_REF }}
+        name: tarballs-${{ steps.subst-github-ref.outputs.result }}
         path: |
           nut-*.tar*
         compression-level: 0