feat: e on the status pane edits the config (#55)

`e` on the status pane (`0`) opens your config file, as in lazygit's status panel. The status footer shows it as `e edit config`. There's no global key. It opens the config the same way `e` opens a local file:
- inside nvim, in that nvim (lazysecrets quits);
- otherwise in `$VISUAL` or `$EDITOR`, coming back after;
- otherwise in the system's default app.

It opens the first config file: your own, also when `--config` layers several. A config that doesn't exist yet is created with a comment linking to its docs. Closing the editor says "restart lazysecrets to use it", since the config is read at startup.

Docs: keys.md (status pane) and config.md. Tested: the default app with a new config, nvim with an existing one left unchanged, the restart message, and the footer.

🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: #55
Co-authored-by: Karl-Einar Bergstrøm <karl-einarb@outlook.com>

internal/ui/app/edit.go

@@ -3,6 +3,7 @@ package app
 import (
 	"cmp"
 	"errors"
+	"io/fs"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -13,18 +14,20 @@ import (
 
 	"git.kebcloud.no/keb/lazysecrets/internal/browser"
 	"git.kebcloud.no/keb/lazysecrets/internal/provider"
+	"git.kebcloud.no/keb/lazysecrets/internal/update"
 )
 
-// Opening a repo's file (e): SOPS files with sops edit, which decrypts
+// Opening a repo's file (e), or on the status pane the config: SOPS files with sops edit, which decrypts
 // them for the editor and encrypts them again after. Other files, inside
 // nvim: in that nvim, once lazysecrets has quit; else in $VISUAL or
 // $EDITOR, coming back after; else in the system's default app. On a
 // secret, editors that can open at a line start on its key.
 
 type editDoneMsg struct {
-	c    provider.Container
-	name string
-	err  error
+	c      provider.Container
+	name   string
+	config bool // the config file: read at startup
+	err    error
 }
 
 // sopsUnchanged is sops edit's exit code when the file wasn't changed.
@@ -44,6 +47,8 @@ func (m *Model) edit() tea.Cmd {
 	var c provider.Container
 	var o *provider.Object
 	switch m.focus {
+	case paneStatus: // like lazygit's status panel
+		return m.editConfig()
 	case paneSources:
 		m.flash = warning("select a file to open it")
 		return nil
@@ -93,6 +98,33 @@ func (m *Model) edit() tea.Cmd {
 	return m.openInEditor(f, finished)
 }
 
+// configHeader starts a config file made to be edited.
+const configHeader = "# lazysecrets config: " + update.DefaultRepo + "/src/branch/main/docs/config.md\n"
+
+// editConfig opens the user's config file (the first of them), as e
+// opens a file, making it if it isn't there yet: e on the status pane.
+func (m *Model) editConfig() tea.Cmd {
+	if len(m.configFiles) == 0 {
+		m.flash = warning("no config file")
+		return nil
+	}
+	path := m.configFiles[0]
+	if _, err := os.Stat(path); errors.Is(err, fs.ErrNotExist) {
+		err := os.MkdirAll(filepath.Dir(path), 0o755)
+		if err == nil {
+			err = os.WriteFile(path, []byte(configHeader), 0o644)
+		}
+		if err != nil {
+			m.flash = flash{text: "edit config: " + err.Error(), isErr: true}
+			return nil
+		}
+	}
+	name := filepath.Base(path)
+	return m.openInEditor(provider.File{Path: path}, func(err error) tea.Msg {
+		return editDoneMsg{name: name, config: true, err: err}
+	})
+}
+
 // plusLine are editors that open at a line with +N before the file.
 var plusLine = map[string]bool{
 	"vi": true, "vim": true, "nvim": true, "nano": true, "emacs": true, "emacsclient": true,
@@ -142,6 +174,10 @@ func (m *Model) handleEditDone(msg editDoneMsg) tea.Cmd {
 		m.flash = flash{text: "open " + msg.name + ": " + msg.err.Error(), isErr: true}
 		return nil
 	}
+	if msg.config {
+		m.flash = done("closed " + msg.name + ": restart lazysecrets to use it")
+		return nil
+	}
 	m.flash = done("closed " + msg.name)
 	if c, ok := m.containers.Selected(); ok && containerKey(c) == containerKey(msg.c) {
 		m.hideValue()

internal/ui/app/help.go

@@ -54,7 +54,8 @@ func (c contextHelp) ShortHelp() []key.Binding {
 	switch {
 	case c.focus == paneStatus:
 		details := key.NewBinding(key.WithKeys(k.Enter.Keys()...), key.WithHelp(k.Enter.Help().Key, "details"))
-		return append(b, details, k.Update, k.Help, k.Quit)
+		config := key.NewBinding(key.WithKeys(k.Edit.Keys()...), key.WithHelp(k.Edit.Help().Key, "edit config"))
+		return append(b, details, config, k.Update, k.Help, k.Quit)
 	case c.focus == paneDetail && c.account && c.of == paneStatus:
 		open := key.NewBinding(key.WithKeys(k.Open.Keys()...), key.WithHelp(k.Open.Help().Key, "open link"))
 		return append(b, k.Up, k.Down, copyField, open, k.Edit, k.Filter, k.Help, k.Quit)

internal/ui/app/repo_test.go

@@ -342,3 +342,53 @@ func TestEditorAtLine(t *testing.T) {
 		}
 	}
 }
+
+func TestEditConfig(t *testing.T) {
+	t.Parallel()
+	path := filepath.Join(t.TempDir(), "lazysecrets", "config.yaml")
+	var opened []string
+	d := newDriverOpts(t, Options{ConfigFiles: []string{path}, OpenURL: func(u string) error { opened = append(opened, u); return nil }})
+	d.m.getenv = func(string) string { return "" }
+
+	// e on the status pane. No editor: the system's default app, on a
+	// config made for it.
+	d.keys("0", "e")
+	if !slices.Equal(opened, []string{path}) {
+		t.Errorf("opened %q", opened)
+	}
+	if b, err := os.ReadFile(path); err != nil || !strings.HasPrefix(string(b), "# lazysecrets config") {
+		t.Errorf("config made: %q, %v", b, err)
+	}
+
+	// Inside nvim: in that nvim; an existing config is left as it is.
+	os.WriteFile(path, []byte("icons: false\n"), 0o644)
+	d.m.getenv = func(k string) string { return map[string]string{"NVIM": "/tmp/nvim.sock"}[k] }
+	var nvim []string
+	d.m.nvimOpen = func(server, path string, line int) error {
+		nvim = append(nvim, server+" "+path)
+		return nil
+	}
+	if msg := d.m.editConfig()(); msg != (tea.QuitMsg{}) {
+		t.Errorf("didn't quit for nvim: %v", msg)
+	}
+	if want := []string{"/tmp/nvim.sock " + path}; !slices.Equal(nvim, want) {
+		t.Errorf("nvim got %q", nvim)
+	}
+	if b, _ := os.ReadFile(path); string(b) != "icons: false\n" {
+		t.Errorf("config changed: %q", b)
+	}
+
+	d.send(editDoneMsg{name: "config.yaml", config: true})
+	if !strings.Contains(d.m.flash.text, "restart") {
+		t.Errorf("flash %q", d.m.flash.text)
+	}
+}
+
+func TestStatusFooterEditsConfig(t *testing.T) {
+	t.Parallel()
+	d := newDriver(t)
+	d.keys("0")
+	if !strings.Contains(d.screen(), "e edit config") {
+		t.Errorf("no edit config in the footer:\n%s", d.screen())
+	}
+}

internal/ui/keys/keys.go

@@ -114,7 +114,7 @@ func (m *Map) Actions() []Action {
 		a(Lists, "copyReference", &m.CopyRef, "copy reference", "secrets", "Copy the reference to use in config, e.g. @Microsoft.KeyVault(SecretUri=…) or {{secrets/scope/key}}."),
 		a(Lists, "versions", &m.Versions, "versions", "secrets", "List the versions of the selected item (Azure). Reveal, copy and share then act on the selected version."),
 		a(Lists, "openInBrowser", &m.Open, "open in browser", "secrets", "Open the selected subscription, vault or item in the browser (Azure portal or Databricks workspace)."),
-		a(Lists, "edit", &m.Edit, "open file", "secrets", "Open the selected SOPS or .env file, or the file of the selected secret at its line. SOPS files open with sops edit. Others open in the nvim lazysecrets runs in (quitting lazysecrets), else in $VISUAL or $EDITOR, else in the system's default app."),
+		a(Lists, "edit", &m.Edit, "open file", "secrets", "Open the selected SOPS or .env file, or the file of the selected secret at its line; on the status pane, your config (made if it isn't there yet). SOPS files open with sops edit. Others open in the nvim lazysecrets runs in (quitting lazysecrets), else in $VISUAL or $EDITOR, else in the system's default app."),
 
 		a(Lists, "share", &m.Share, "copy link", "share", "Copy a lazysecrets:// link to the selected subscription, workspace, vault, scope or secret, for sharing. From the versions view the link is pinned to that version."),
 		a(Lists, "shareMenu", &m.ShareMenu, "share", "share", "Choose what to share: the lazysecrets link, the plain Key Vault URL, the config reference, or the web page."),