default is "main" branch, not "develop"

fixes #112

Co-authored-by: Anton Wiklund <[email protected]>
Signed-off-by: Eric Herman <[email protected]>

Author: ericherman

.github/workflows/test.yml

@@ -19,4 +19,4 @@ jobs:
       - run: bundle install
       - run: ./script/test-markdown.sh
       - run: ./script/test-without-link-check.sh
-      - run: ./script/check-new-links.sh
+      - run: VERBOSE=1 ./script/check-new-links.sh

script/check-new-links.sh

@@ -1,4 +1,6 @@
 #!/bin/bash
+set -e
+set -o pipefail
 
 # This script is referenced by .github/workflows/test.yml which executes on
 # each pull request.
@@ -18,9 +20,18 @@ SKIP_PATTERNS=(
 
 if [ "_${VERBOSE}_" == "__" ]; then VERBOSE=0; fi
 
-for URL in $(git diff develop |
+BRANCH=$(git rev-parse --abbrev-ref HEAD)
+REMOTE=$(git config branch.$BRANCH.remote)
+git fetch --depth=1 $REMOTE main
+
+# the second grep is allowed to "fail" without matching
+URLS=$(git diff main |
 		grep '^+' |
-		grep -Eo '(http|https)://[^ )"><]+'); do
+		grep --extended-regexp --only-matching \
+			'(http|https)://[^ )"><]+' || true
+)
+
+for URL in $URLS; do
 	SKIP_URL=0
 	for PATTERN in "${SKIP_PATTERNS[@]}"; do
 		if echo "$URL" | grep --quiet --extended-regexp "$PATTERN"