fix: help mutagen work with Drupal's read-only settings files, fixes d…

…dev#6491 (ddev#6529)

pkg/ddevapp/drupal.go

@@ -6,6 +6,7 @@ import (
 	"path"
 	"path/filepath"
 	"strconv"
+	"strings"
 	"text/template"
 
 	"github.com/ddev/ddev/pkg/archive"
@@ -522,6 +523,23 @@ func drupalEnsureWritePerms(app *DdevApp) error {
 			util.Warning("Unable to set permissions: %v", err)
 		}
 	}
+	// It is possible that a Drupal install has been done, setting sites/default and sites/default/settings.php
+	// to read-only, which breaks mutagen's access to them so mutagen then
+	// can't sync. See https://github.com/ddev/ddev/issues/6491
+	// So we chmod +w the two files that a Drupal install may set read-only
+	// *inside* the container, allowing mutagen access to it again
+	if app.IsMutagenEnabled() {
+		settingsFiles := []string{
+			filepath.Join(app.Docroot, `sites/default`),
+			filepath.Join(app.Docroot, `sites/default/settings.php`),
+		}
+		_, stderr, err := app.Exec(&ExecOpts{
+			Cmd: fmt.Sprintf(`chmod -f u+w %s`, strings.Join(settingsFiles, " ")),
+		})
+		if err != nil {
+			util.Warning("Unable to set permissions inside container on settings files: '%s'", stderr)
+		}
+	}
 
 	return nil
 }

pkg/ddevapp/mutagen.go

@@ -384,11 +384,17 @@ func (app *DdevApp) MutagenStatus() (status string, shortResult string, mapResul
 		if _, ok = alpha["scanProblems"]; ok {
 			problems = true
 		}
+		if _, ok = alpha["transitionProblems"]; ok {
+			problems = true
+		}
 	}
 	if beta, ok := session["beta"].(map[string]interface{}); ok {
 		if _, ok = beta["scanProblems"]; ok {
 			problems = true
 		}
+		if _, ok = beta["transitionProblems"]; ok {
+			problems = true
+		}
 	}
 	if _, ok := session["conflicts"]; ok {
 		problems = true