feat: start sops edit on the key's line

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/repos.md

@@ -77,7 +77,9 @@ KMS, PGP). When sops can't decrypt, its whole error message is shown.
   without either, in the system's default app for the file.
 
 Editors that take a line (vim, nvim, nano, emacs, micro, helix, VS Code,
-Zed, Sublime and others) start on the key.
+Zed, Sublime and others) start on the key. With `sops edit` that works for
+editors taking `+N` (vim, nvim, nano, emacs, micro and others), and needs
+sops 3.8 or later.
 
 ## Links
 

internal/ui/app/edit.go

@@ -1,6 +1,7 @@
 package app
 
 import (
+	"cmp"
 	"errors"
 	"os"
 	"os/exec"
@@ -71,6 +72,12 @@ func (m *Model) edit() tea.Cmd {
 	if f.Sops != "" {
 		cmd := exec.Command(f.Sops, "edit", f.Path)
 		cmd.Dir = filepath.Dir(f.Path) // sops looks for .sops.yaml from here
+		// sops starts SOPS_EDITOR (else EDITOR, else vim) on the decrypted
+		// copy, which keeps the file's lines: start it on the key.
+		editor := cmp.Or(m.getenv("SOPS_EDITOR"), m.getenv("EDITOR"), "vim")
+		if at, ok := editorAtLine(editor, f.Line); ok {
+			cmd.Env = append(os.Environ(), "SOPS_EDITOR="+at)
+		}
 		m.flash = flash{}
 		return tea.ExecProcess(cmd, finished)
 	}
@@ -100,6 +107,22 @@ func (m *Model) edit() tea.Cmd {
 	return nil
 }
 
+// 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,
+	"micro": true, "kak": true, "mg": true, "ne": true, "joe": true, "vis": true,
+}
+
+// editorAtLine is editor starting at line, for editors that take +N:
+// sops adds the file after it.
+func editorAtLine(editor string, line int) (string, bool) {
+	fields := strings.Fields(editor)
+	if line == 0 || len(fields) == 0 || !plusLine[filepath.Base(fields[0])] {
+		return "", false
+	}
+	return editor + " +" + strconv.Itoa(line), true
+}
+
 // editorArgs opens f at its line, for editors known to take one.
 func editorArgs(editor string, f provider.File) []string {
 	fields := strings.Fields(editor)
@@ -107,12 +130,12 @@ func editorArgs(editor string, f provider.File) []string {
 		return []string{f.Path}
 	}
 	at := f.Path + ":" + strconv.Itoa(f.Line)
-	switch filepath.Base(fields[0]) {
+	switch base := filepath.Base(fields[0]); {
-	case "vi", "vim", "nvim", "nano", "emacs", "emacsclient", "micro", "kak", "mg", "ne", "joe", "vis":
+	case plusLine[base]:
 		return []string{"+" + strconv.Itoa(f.Line), f.Path}
-	case "hx", "helix", "subl", "zed":
+	case base == "hx" || base == "helix" || base == "subl" || base == "zed":
 		return []string{at}
-	case "code", "codium", "cursor", "windsurf":
+	case base == "code" || base == "codium" || base == "cursor" || base == "windsurf":
 		return []string{"-g", at}
 	}
 	return []string{f.Path}

internal/ui/app/repo_test.go

@@ -323,3 +323,22 @@ func TestEditorArgs(t *testing.T) {
 		t.Errorf("no line: %q", got)
 	}
 }
+
+func TestEditorAtLine(t *testing.T) {
+	t.Parallel()
+	for _, c := range []struct {
+		editor string
+		line   int
+		want   string
+		ok     bool
+	}{
+		{"nvim", 4, "nvim +4", true},
+		{"/usr/bin/vim -p", 4, "/usr/bin/vim -p +4", true},
+		{"code --wait", 4, "", false}, // sops adds the file last: no -g file:N
+		{"nvim", 0, "", false},
+	} {
+		if got, ok := editorAtLine(c.editor, c.line); got != c.want || ok != c.ok {
+			t.Errorf("%q at %d: %q %v", c.editor, c.line, got, ok)
+		}
+	}
+}