inspect: display buildkit daemon configuration file

Signed-off-by: CrazyMax <[email protected]>

commands/inspect.go

@@ -126,6 +126,14 @@ func runInspect(ctx context.Context, dockerCli command.Cli, in inspectOptions) e
 						fmt.Fprintf(w, "\tKeep Bytes:\t%s\n", units.BytesSize(float64(rule.KeepBytes)))
 					}
 				}
+				if debug.IsEnabled() {
+					for f, dt := range nodes[i].Files {
+						fmt.Fprintf(w, "File#%s:\n", f)
+						for _, line := range strings.Split(string(dt), "\n") {
+							fmt.Fprintf(w, "\t> %s\n", line)
+						}
+					}
+				}
 			}
 		}
 	}

tests/inspect.go

@@ -1,6 +1,9 @@
 package tests
 
 import (
+	"os"
+	"path"
+	"regexp"
 	"strings"
 	"testing"
 
@@ -19,6 +22,7 @@ var inspectTests = []func(t *testing.T, sb integration.Sandbox){
 	testInspect,
 	testInspectBuildkitdFlags,
 	testInspectNetworkHostEntitlement,
+	testInspectBuildkitdConf,
 }
 
 func testInspect(t *testing.T, sb integration.Sandbox) {
@@ -109,3 +113,68 @@ func testInspectNetworkHostEntitlement(t *testing.T, sb integration.Sandbox) {
 	}
 	require.Fail(t, "network.host insecure entitlement not found in inspect output")
 }
+
+func testInspectBuildkitdConf(t *testing.T, sb integration.Sandbox) {
+	if !isDockerContainerWorker(sb) {
+		t.Skip("only testing with docker-container worker")
+	}
+
+	buildkitdConf := `
+# debug enables additional debug logging
+debug = true
+# insecure-entitlements allows insecure entitlements, disabled by default.
+insecure-entitlements = [ "network.host", "security.insecure" ]
+
+[log]
+  # log formatter: json or text
+  format = "text"
+`
+
+	expectedContent := `debug = true
+insecure-entitlements = ["network.host", "security.insecure"]
+
+[log]
+  format = "text"
+`
+
+	var builderName string
+	t.Cleanup(func() {
+		if builderName == "" {
+			return
+		}
+		out, err := rmCmd(sb, withArgs(builderName))
+		require.NoError(t, err, out)
+	})
+
+	dirConf := t.TempDir()
+	buildkitdConfPath := path.Join(dirConf, "buildkitd-conf.toml")
+	require.NoError(t, os.WriteFile(buildkitdConfPath, []byte(buildkitdConf), 0644))
+
+	out, err := createCmd(sb, withArgs("--driver", "docker-container", "--buildkitd-config="+buildkitdConfPath))
+	require.NoError(t, err, out)
+	builderName = strings.TrimSpace(out)
+
+	out, err = inspectCmd(sb, withArgs(builderName, "--debug"))
+	require.NoError(t, err, out)
+
+	var fileLines []string
+	var fileFound bool
+	var reConfLine = regexp.MustCompile(`^[\s\t]*>\s*(.*)`)
+	for _, line := range strings.Split(out, "\n") {
+		if strings.HasPrefix(line, "File#buildkitd.toml:") {
+			fileFound = true
+			continue
+		}
+		if fileFound {
+			if matches := reConfLine.FindStringSubmatch(line); len(matches) > 1 {
+				fileLines = append(fileLines, matches[1])
+			} else {
+				break
+			}
+		}
+	}
+	if !fileFound {
+		require.Fail(t, "File#buildkitd.toml not found in inspect output")
+	}
+	require.Equal(t, expectedContent, strings.Join(fileLines, "\n"), "File#buildkitd.toml content mismatch")
+}