do not send empty repo_info when not available in attest artifact cmd (#698)

this is related to kosli-dev/server#4929

Author: sami-alajrami

cmd/kosli/attestArtifact.go

@@ -30,7 +30,7 @@ type AttestArtifactPayload struct {
 	Filename      string                   `json:"filename"`
 	GitCommit     string                   `json:"git_commit"`
 	GitCommitInfo *gitview.BasicCommitInfo `json:"git_commit_info"`
-	GitRepoInfo   *gitview.GitRepoInfo     `json:"repo_info"`
+	GitRepoInfo   *gitview.GitRepoInfo     `json:"repo_info,omitempty"`
 	BuildUrl      string                   `json:"build_url"`
 	CommitUrl     string                   `json:"commit_url"`
 	RepoUrl       string                   `json:"repo_url"`

cmd/kosli/attestArtifact_test.go

@@ -1,7 +1,9 @@
 package main
 
 import (
+	"encoding/json"
 	"fmt"
+	"strings"
 	"testing"
 
 	"github.com/stretchr/testify/suite"
@@ -114,6 +116,30 @@ func (suite *AttestArtifactCommandTestSuite) TestAttestArtifactCmd() {
 	runTestCmd(suite.T(), tests)
 }
 
+// TestAttestArtifactPayload_RepoInfoOmittedWhenNil ensures that when GitRepoInfo
+// is not available (nil), the JSON payload does not include the repo_info field
+// (omitempty behavior).
+func TestAttestArtifactPayload_RepoInfoOmittedWhenNil(t *testing.T) {
+	payload := AttestArtifactPayload{
+		Fingerprint: "abc123",
+		Filename:    "file1",
+		GitCommit:   "sha",
+		BuildUrl:    "https://build.example.com",
+		CommitUrl:   "https://commit.example.com",
+		RepoUrl:     "https://repo.example.com",
+		Name:        "cli",
+		TrailName:   "trail-1",
+		GitRepoInfo: nil, // not available
+	}
+	data, err := json.Marshal(payload)
+	if err != nil {
+		t.Fatalf("marshal payload: %v", err)
+	}
+	if strings.Contains(string(data), "repo_info") {
+		t.Errorf("payload must not include repo_info when GitRepoInfo is nil, got: %s", string(data))
+	}
+}
+
 // In order for 'go test' to run this suite, we need to create
 // a normal test function and pass our suite to suite.Run
 func TestAttestArtifactCommandTestSuite(t *testing.T) {