feat(cli): adds support for polling git hash from Argo CD (#89)

Author: jmgilman

lib/project/project/runtime.go

@@ -3,6 +3,10 @@ package project
 import (
 	"fmt"
 	"log/slog"
+	"os"
+
+	"github.com/input-output-hk/catalyst-forge/lib/tools/argo"
+	tg "github.com/input-output-hk/catalyst-forge/lib/tools/git"
 
 	"cuelang.org/go/cue"
 	"github.com/go-git/go-git/v5"
@@ -55,15 +59,31 @@ func GetDefaultRuntimes(logger *slog.Logger) []RuntimeData {
 
 // getCommitHash returns the commit hash of the HEAD commit.
 func getCommitHash(repo *git.Repository) (string, error) {
-	ref, err := repo.Head()
-	if err != nil {
-		return "", fmt.Errorf("failed to get HEAD: %w", err)
-	}
+	if tg.InCI() {
+		v, exists := os.LookupEnv("GITHUB_SHA")
+		if !exists {
+			return "", fmt.Errorf("GITHUB_SHA not found in environment")
+		}
 
-	obj, err := repo.CommitObject(ref.Hash())
-	if err != nil {
-		return "", fmt.Errorf("failed to get commit object: %w", err)
-	}
+		return v, nil
+	} else if argo.InArgo() {
+		v, exists := os.LookupEnv("ARGOCD_APP_REVISION")
+		if !exists {
+			return "", fmt.Errorf("ARGOCD_APP_REVISION not found in environment")
+		}
 
-	return obj.Hash.String(), nil
+		return v, nil
+	} else {
+		ref, err := repo.Head()
+		if err != nil {
+			return "", fmt.Errorf("failed to get HEAD: %w", err)
+		}
+
+		obj, err := repo.CommitObject(ref.Hash())
+		if err != nil {
+			return "", fmt.Errorf("failed to get commit object: %w", err)
+		}
+
+		return obj.Hash.String(), nil
+	}
 }

lib/tools/argo/util.go

@@ -0,0 +1,12 @@
+package argo
+
+import "os"
+
+// InArgo returns true if the code is running in an Argo CD environment.
+func InArgo() bool {
+	if _, ok := os.LookupEnv("ARGOCD_APP_NAME"); ok {
+		return true
+	}
+
+	return false
+}