Add support for multiple git-check-assertions blocks

bin/git-check-assertions

@@ -106,11 +106,11 @@ for commit_hash in "${commits[@]}"; do
   echo "Checking out $commit_hash"
   git -c advice.detachedHead=false checkout -q "$commit_hash"
   commit_msg="$(git log -1 --format=%B "$commit_hash")"
-  # shellcheck disable=SC2016
-  block="$(printf '%s\n' "$commit_msg" |
-    sed -n '/^```git-check-assertions[[:space:]]*$/,/^```[[:space:]]*$/p' |
-    sed '1d;$d')"
-  if [ -n "$block" ]; then
+  mapfile -d '' -t blocks < <(
+    printf '%s\n' "$commit_msg" |
+      perl -0777 -ne 'while (/^```git-check-assertions\s*\n(.*?)^```\s*$/msg){ print $1, "\0" }'
+  )
+  for block in "${blocks[@]}"; do
     echo "git-check-assertions block in $commit_hash:"
     printf '%s\n' "$block" | sed 's/^/> /'
     if ! bash -euo pipefail -c "$block"; then
@@ -121,7 +121,7 @@ for commit_hash in "${commits[@]}"; do
       exit 1
     fi
     restore
-  fi
+  done
   printf '%s\n' "$commit_hash" >>.git-check-assertions-cache
   echo
 done

default.nix

@@ -9,6 +9,7 @@
   gitMinimal,
   resholve,
   shfmt,
+  perl,
 }:
 
 let
@@ -40,6 +41,7 @@ resholve.mkDerivation {
     ]))
     gitMinimal
     shfmt
+    perl
   ];
 
   checkPhase = ''
@@ -66,6 +68,7 @@ resholve.mkDerivation {
       gitMinimal
       gnused
       bash
+      perl
     ];
     execer = [
       # Not true at all, but ¯\_(ツ)_/¯

flake.nix

@@ -22,6 +22,7 @@
               p.bats-support
               p.bats-file
             ]))
+            pkgs.perl
             pkgs.shfmt
           ];
         };

test/git-check-assertions.bats

@@ -124,6 +124,27 @@ commit_with_assertion() {
   assert_output "feature"
 }
 
+@test "multiple git-check-assertions blocks in one commit message run in order" {
+  git checkout -b feature
+  git commit --allow-empty -F - <<-EOF
+		test
+
+		\`\`\`git-check-assertions
+		touch ../test1
+		\`\`\`
+
+		\`\`\`git-check-assertions
+		touch ../test2
+		\`\`\`
+	EOF
+
+  run git-check-assertions
+
+  assert_success
+  assert_file_exists ../test1
+  assert_file_exists ../test2
+}
+
 @test "should stop at the first failing assertion block and return to the original branch" {
   git checkout -b feature
   commit_with_assertion "touch ../test1 && exit 3"