check for too big output and no output

Author: HarryGogonis

.github/workflows/test.yml

@@ -11,19 +11,14 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - id: find
-        run: |
-          {
-            echo 'kustomizations<<EOF'
-            find testdata/* -maxdepth 1 -type d -not -name "*base"
-            echo EOF
-          } >>"$GITHUB_OUTPUT"
       - id: test-action
         uses: ./
         with:
           base_ref: 027b33661ae3211230e8cd03d19df49ba620b379
           head_ref: 182a672418c5bae4d6b7ca1244da5f28bf5ff6f0
-          kustomizations: ${{ steps.find.outputs.kustomizations }}
+          kustomizations: |-
+            testdata/prod
+            testdata/stage
       - uses: mshick/add-pr-comment@v2
         with:
           message: ${{ steps.test-action.outputs.diff }}

entrypoint.sh

@@ -4,8 +4,6 @@ set -eux
 
 build_dir=$(mktemp -d)
 
-echo $INPUT_KUSTOMIZATIONS
-
 build() {
 	ref="$1"
 	git checkout "$1" --quiet
@@ -37,6 +35,14 @@ set -e
 # Formatting hacks
 output=$(cat diff.md | sed "s|$base_ref_build_dir/||" | sed '/Comparing/ s/&.*$//' | sed "s|^#\{2,\} Comparing| Comparing|" | sed "s|^# Comparing|## Comparing|")
 
+if [ ${#output} -gt 65535 ]; then
+	output="Kustomize diff too large to display"
+fi
+
+if [ -z "$output" ]; then
+	output="Kustomize diff did not find any differences"
+fi
+
 {
 	echo 'diff<<EOF'
 	echo "$output"