feat: set number changed flags in github action outputs (#23)

.github/workflows/main.yml

@@ -1,3 +1,6 @@
+# Run test file with command:
+#   act pull_request -e testdata/act/pull-request.json
+
 name: Test Find Flags
 on: pull_request
 
@@ -17,3 +20,8 @@ jobs:
           accessToken: ${{ secrets.LD_ACCESS_TOKEN }}
           githubToken: ${{ secrets.GITHUB_TOKEN }}
           baseUri: https://app.launchdarkly.com
+      - name: Find flags summary
+        run: |
+          echo "flags addded or modified ${{ steps.find_flags.outputs.flags_modified }}"
+          echo "flags removed ${{ steps.find_flags.outputs.flags_removed }}"
+

.gitignore

@@ -1,2 +1,3 @@
 .vscode
 cr-flags
+.secrets

.secrets.example.env

@@ -0,0 +1,4 @@
+# Save as .secrets for testing with nektos/act
+
+LD_ACCESS_TOKEN= # LaunchDarkly access token
+GITHUB_TOKEN= # GitHub PAT with repo access

action.yml

@@ -38,3 +38,9 @@ inputs:
     description: 'Maximum number of flags to find per PR.'
     required: false
     default: '5'
+
+outputs:
+  flags_modified:
+    description: Number of flags added or modified in pull request
+  flags_removed:
+    description: Number of flags removed in pull request

internal/github_actions/actions.go

@@ -0,0 +1,19 @@
+package github_actions
+
+import (
+	"fmt"
+	"log"
+	"os"
+)
+
+func SetOutput(name, value string) error {
+	output := os.Getenv("GITHUB_OUTPUT")
+
+	f, err := os.OpenFile(output, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		log.Println(err)
+	}
+	defer f.Close()
+	_, err = fmt.Fprintf(f, "%s=%s\n", name, value)
+	return err
+}

main.go

@@ -14,6 +14,7 @@ import (
 	ghc "github.com/launchdarkly/cr-flags/comments"
 	lcr "github.com/launchdarkly/cr-flags/config"
 	ldiff "github.com/launchdarkly/cr-flags/diff"
+	gha "github.com/launchdarkly/cr-flags/internal/github_actions"
 	"github.com/launchdarkly/ld-find-code-refs/v2/aliases"
 	"github.com/launchdarkly/ld-find-code-refs/v2/options"
 	"github.com/sourcegraph/go-diff/diff"
@@ -61,6 +62,10 @@ func main() {
 		}
 	}
 
+	// Set outputs
+	setOutputs(flagsRef)
+
+	// Add comment
 	existingComment := checkExistingComments(event, config, ctx)
 	buildComment := ghc.ProcessFlags(flagsRef, flags, config)
 	postedComments := ghc.BuildFlagComment(buildComment, flagsRef, existingComment)
@@ -183,6 +188,17 @@ func getAliases(config *lcr.Config, flagKeys []string) (map[string][]string, err
 
 }
 
+func setOutputs(flagsRef ghc.FlagsRef) {
+	err := gha.SetOutput("flags_modified", fmt.Sprintf("%d", len(flagsRef.FlagsAdded)))
+	if err != nil {
+		log.Println("Failed to set outputs.flags_modified")
+	}
+	err = gha.SetOutput("flags_removed", fmt.Sprintf("%d", len(flagsRef.FlagsRemoved)))
+	if err != nil {
+		log.Println("Failed to set outputs.flags_removed")
+	}
+}
+
 func failExit(err error) {
 	if err != nil {
 		log.Println(err)

testdata/act/pull-request.json

@@ -0,0 +1,11 @@
+{
+  "pull_request": {
+    "number": 20,
+    "head": {
+      "ref": "sample-head-ref"
+    },
+    "base": {
+      "ref": "sample-base-ref"
+    }
+  }
+}

testdata/test

@@ -1,4 +1,6 @@
 show-widgets
+beta-ui
 showWidgets
+betaUi
 show_widgets
-saver-goal
+beta_ui