Take commit msg from SHA-1 to verify pr prefix; don't count Signed-Off-By

Commit fixes issues:
- git body count characters "fits" for requirements when "Signed-Off-By"
  was set
- take commit message from commit SHA-1 instead of compute it in the
  script in Github workflows

Signed-off-by: Daniel Pawlik <[email protected]>

Author: danpawlik

.github/workflows/verify-pr-prefix.yml

@@ -20,7 +20,12 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: Dump commit message to file
+        run: |
+          git fetch origin ${{ github.event.pull_request.head.sha }}
+          git log -1 --pretty=format:"%B" ${{ github.event.pull_request.head.sha }} | head -n1 > commit-message-file
+
       - name: Run commit message check
         id: prefixcheck
         run: |
-          ./scripts/check-role-prefix.sh
+          ./scripts/check-role-prefix.sh commit-message-file

scripts/check-role-prefix.sh

@@ -1,8 +1,12 @@
 #!/bin/bash
 
 # Get the latest commit message file
-TMP_MSG_FILE=$(mktemp)
-git log -1 --pretty=format:"%s%n%n%b" >"$TMP_MSG_FILE"
+TMP_MSG_FILE="$1"
+
+if [ -z "$TMP_MSG_FILE" ]; then
+    TMP_MSG_FILE=$(mktemp)
+    git log -1 --pretty=format:"%B" | head -n1
+fi
 
 echo "Checking latest commit message:"
 cat "$TMP_MSG_FILE"

scripts/git-check-commit-body-length.sh

@@ -20,7 +20,7 @@ FAIL_LENGTH=0
 FAIL_SIGNED_OFF_BY=0
 
 BODY=$(tail -n +3 "$MSG_FILE" | sed '/^\s*#/d' | sed '/^\s*$/d')
-BODY_LEN=$(echo -n "$BODY" | wc -m)
+BODY_LEN=$(echo -n "$BODY" | sed '/Signed-off-by:/d' | wc -m)
 
 if [ "$BODY_LEN" -lt "$MIN_BODY_LEN" ]; then
     echo -e "\n\n**WARNING: Commit message body is too short (has $BODY_LEN chars, minimum $MIN_BODY_LEN required).**\n" >&2