From 81b16b7c270f7f8a5fbdc8ea97e3aab17e9215dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kacper=20Ma=C5=82achowski?= <kacper.malachowski@sap.com>
Date: Thu, 2 Jan 2025 12:11:00 +0100
Subject: [PATCH] Parse jenkins env

---
 cmd/image-builder/config.go      | 53 ++++++++++++++++++++++++++++++--
 cmd/image-builder/config_test.go | 42 +++++++++++++++++++++++++
 2 files changed, 92 insertions(+), 3 deletions(-)

diff --git a/cmd/image-builder/config.go b/cmd/image-builder/config.go
index 839b56e6b748..8f1fce74890f 100644
--- a/cmd/image-builder/config.go
+++ b/cmd/image-builder/config.go
@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"os"
+	"regexp"
 	"slices"
 	"strconv"
 
@@ -157,7 +158,7 @@ func LoadGitStateConfig(ciSystem CISystem) (GitStateConfig, error) {
 	case GithubActions:
 		return loadGithubActionsGitState()
 	case Jenkins:
-		return loadJenksingGitState()
+		return loadJenkinsGitState()
 	default:
 		// Unknown CI System, return error and empty git state
 		return GitStateConfig{}, fmt.Errorf("unknown ci system, got %s", ciSystem)
@@ -329,9 +330,55 @@ func loadGithubActionsGitState() (GitStateConfig, error) {
 	}
 }
 
-func loadJenksingGitState() (GitStateConfig, error) {
+func loadJenkinsGitState() (GitStateConfig, error) {
 	// Load from env specific for Jenkins Jobs
-	return GitStateConfig{}, fmt.Errorf("Jenkins is not supported as CI system")
+	prID, isPullRequest := os.LookupEnv("CHANGE_ID")
+	gitURL := os.Getenv("GIT_URL")
+
+	owner, repo, err := extractOwnerAndRepoFromGitURL(gitURL)
+	if err != nil {
+		return GitStateConfig{}, fmt.Errorf("failed to extract owner and repository from git URL %s: %w", gitURL, err)
+	}
+
+	baseCommitSHA := os.Getenv("GIT_COMMIT")
+
+	gitState := GitStateConfig{
+		RepositoryName:  repo,
+		RepositoryOwner: owner,
+		JobType:         "postsubmit",
+		BaseCommitSHA:   baseCommitSHA,
+	}
+
+	if isPullRequest {
+		pullNumber, err := strconv.Atoi(prID)
+		if err != nil {
+			return GitStateConfig{}, fmt.Errorf("failed to parse CHANGE_ID environment variable: %w", err)
+		}
+
+		baseRef := os.Getenv("CHANGE_BRANCH")
+		pullRequestHeadSHA := os.Getenv("CHANGE_TARGET")
+
+		gitState.JobType = "presubmit"
+		gitState.PullRequestNumber = pullNumber
+		gitState.BaseCommitRef = baseRef
+		gitState.PullHeadCommitSHA = pullRequestHeadSHA
+		gitState.isPullRequest = true
+	}
+
+	return gitState, nil
+}
+
+func extractOwnerAndRepoFromGitURL(gitURL string) (string, string, error) {
+	re := regexp.MustCompile(`.*/(.*)/(.*)`)
+
+	matches := re.FindStringSubmatch(gitURL)
+	fmt.Println(matches, gitURL)
+
+	if len(matches) != 3 {
+		return "", "", fmt.Errorf("failed to extract owner and repository from git URL")
+	}
+
+	return matches[1], matches[2], nil
 }
 
 // DetermineUsedCISystem return CISystem bind to system in which image builder is running or error if unknown
diff --git a/cmd/image-builder/config_test.go b/cmd/image-builder/config_test.go
index a54cb4480122..5d5325924886 100644
--- a/cmd/image-builder/config_test.go
+++ b/cmd/image-builder/config_test.go
@@ -379,6 +379,48 @@ func TestLoadGitStateConfig(t *testing.T) {
 				PullHeadCommitSHA: "e47034172c36d3e5fb407b5ba57adf0f7868599d",
 			},
 		},
+		{
+			name: "load data from push event for jenkins",
+			options: options{
+				ciSystem: Jenkins,
+			},
+			env: map[string]string{
+				"BRANCH_NAME":   "refs/heads/main",
+				"JENKINS_HOME":  "/some/absolute/path",
+				"GIT_URL":       "github.com/kyma-project/test-infra",
+				"GIT_COMMIT":    "1234",
+				"CHANGE_TARGET": "refs/heads/main",
+			},
+			gitState: GitStateConfig{
+				RepositoryName:  "test-infra",
+				RepositoryOwner: "kyma-project",
+				JobType:         "postsubmit",
+				BaseCommitSHA:   "1234",
+			},
+		},
+		{
+			name: "load data from pull request event for jenkins",
+			options: options{
+				ciSystem: Jenkins,
+			},
+			env: map[string]string{
+				"BRANCH_NAME":   "refs/heads/main",
+				"JENKINS_HOME":  "/some/absolute/path",
+				"CHANGE_ID":     "14",
+				"GIT_URL":       "github.com/kyma-project/test-infra",
+				"GIT_COMMIT":    "1234",
+				"CHANGE_TARGET": "4321",
+			},
+			gitState: GitStateConfig{
+				RepositoryName:    "test-infra",
+				RepositoryOwner:   "kyma-project",
+				JobType:           "presubmit",
+				BaseCommitSHA:     "1234",
+				PullRequestNumber: 14,
+				PullHeadCommitSHA: "4321",
+				isPullRequest:     true,
+			},
+		},
 	}
 
 	for _, c := range tc {