Abandon alpine

.gitea/workflows/publish.yaml

@@ -16,24 +16,43 @@ jobs:
       - name: Check out repository code
         uses: actions/checkout@v4
 
+  # I'd like to use `alpine`, here, but it doesn't have `bash` installed by default.
+  # It can be installed with `shell: /bin/sh\nrun: apk add --no-cache bash`, but that's a pain.
+  # In any case, `ubuntu-latest` should already be present, so there shouldn't be extra delay in pulling it.
   block-posts-containining-tk:
     depends-on:
       - checkout
-    runs-on: alpine
+    runs-on: ubuntu-latest
     steps:
-      - shell: /bin/sh
-        run: apk add --no-cache bash
       - run: |
-          echo "Hello World"
+          # This is necessary because, if `grep ...` doesn't find anything, it will _return_ (not print) a value of 1
-          echo "Goodbye Mars"
+          # (non-zero return codes indicating errors in Unix - since there are many more ways for something to go wrong
+          # than there are for it to go right!), and so the `files=` assignment will also return 1, and the whole operation
+          # will be considered a failure.
+          #
+          # Since a non-zero value is truthy in Linux, we can use the OR operator (`||`) to only execute the second command
+          # if the first one errors out. So, this line can be translated to English as:
+          # "Set the variable `files` to a list of all the files that contain `TK` - unless there aren't any, in which case
+          # set it to `FILES NOT FOUND"
+          files=$(grep -rl 'TK' blog/content/posts || echo "FILES NOT FOUND")
+
+          # We have to filter out (`grep -v`) the "marker" value of `FILES NOT FOUND`, otherwise the no-matches case would
+          # be recorded as having 1 matching file, leading to an error-out below.
+          # (I guess _technically_ there's an edge case in that, if I ever make a blog post titled "FILES NOT FOUND" _which also_
+          # contains the string `TK`, it would slip through this check. But that feels pretty unlikely - not least because spaces
+          # are very rare in my filesystem names - so I'm ok taking that risk)
+          count=$(wc -l <(echo "$files" | grep -v "FILES NOT FOUND") | awk '{print $1}')
+          if [[ "$count" -gt "0" ]]; then
+            echo "Found TK in $count files:"
+            echo $files
+            exit 1 # TODO - and alerting via Matrix!
+          fi
     
   build-blog:
     depends-on:
       - block-posts-containining-tk
-    runs-on: alpine
+    runs-on: ubuntu-latest
     steps:
-      - shell: /bin/sh
-        run: apk add --no-cache bash
       - run: |
           apk add --no-cache hugo git
           git submodule init