Add and integrate sdn-edit

CMakeLists.txt

@@ -36,9 +36,9 @@ include (GNUInstallDirs)
 # sdn-mc-ext should be in libexec, but we prefer it in PATH.
 install (TARGETS sdn sdn-mc-ext
 	DESTINATION ${CMAKE_INSTALL_BINDIR})
-install (PROGRAMS sdn-install sdn-open sdn-view
+install (PROGRAMS sdn-install sdn-open sdn-view sdn-edit
 	DESTINATION ${CMAKE_INSTALL_BINDIR})
-install (FILES sdn.1 sdn-install.1 sdn-open.1 sdn-view.1
+install (FILES sdn.1 sdn-install.1 sdn-open.1 sdn-view.1 sdn-edit.1
 	DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
 install (FILES LICENSE DESTINATION ${CMAKE_INSTALL_DOCDIR})
 

NEWS

@@ -1,3 +1,9 @@
+Unreleased
+
+ * Added an sdn-edit script analogous to sdn-view, bound it to F4,
+   and moved the original key binding to F14.
+
+
 1.1.0 (2026-01-10)
 
  * Added selection functionality, and adjusted key bindings:

sdn-edit

@@ -0,0 +1,48 @@
+#!/bin/sh -e
+# sdn-edit: an editor for sdn that makes use of Midnight Commander configuration
+# to make more kinds of files directly editable
+
+if [ "$#" -ne 1 ]
+then
+	echo "Usage: $0 FILE" >&2
+	exit 2
+fi
+
+# This handles both MC_DATADIR and odd installation locations.
+datadir=
+if command -v mc >/dev/null
+then datadir=$(mc --datadir | sed 's/ (.*)$//')
+fi
+
+config=
+for dir in "$HOME"/.config/mc "$datadir" /etc/mc
+do
+	if [ -n "$dir" -a -f "$dir/mc.ext.ini" ]
+	then
+		config=$dir/mc.ext.ini
+		break
+	fi
+done
+
+# This is often used in %env{} expansion, so let's be on the same page.
+export PAGER=${PAGER:-less}
+
+export MC_EXT_FILENAME=$(realpath "$1")
+export MC_EXT_BASENAME=$(basename "$1")
+export MC_EXT_CURRENTDIR=$(dirname "$MC_EXT_FILENAME")
+output=$(sdn-mc-ext <"$config" "$(file -Lbz "$1")" \
+	"$MC_EXT_FILENAME" "$MC_EXT_BASENAME" "$MC_EXT_CURRENTDIR" Edit || :)
+kind=$(echo "$output" | sed -n 1p)
+command=$(echo "$output" | sed -n 2p)
+
+case "$kind" in
+'')
+	if [ -n "$command" ]
+	then eval "$command"
+	else "${VISUAL:-${EDITOR:-vi}}" -- "$MC_EXT_FILENAME"
+	fi
+	;;
+*)
+	echo "Unsupported: $kind" >&2
+	exit 1
+esac

sdn-edit.1

@@ -0,0 +1,24 @@
+.Dd January 27, 2026
+.Dt SDN-EDIT 1
+.Os
+.Sh NAME
+.Nm sdn-edit
+.Nd run Midnight Commander edit configuration externally
+.Sh SYNOPSIS
+.Nm sdn-edit
+.Ar path
+.Sh DESCRIPTION
+.Nm
+invokes
+.Ev VISUAL ,
+.Ev EDITOR
+or a fallback editor on the passed filename.
+.Pp
+If it succeeds in finding a
+.Xr mc 1
+.Pa mc.ext.ini
+file, it will first process it, and run the respective command.
+.Sh REPORTING BUGS
+Use
+.Lk https://git.janouch.name/p/sdn
+to report bugs, request features, or submit pull requests.

sdn.cpp

@@ -440,7 +440,7 @@ enum { ALT = 1 << 24, SYM = 1 << 25 };  // Outside the range of Unicode
 
 #define ACTIONS(XX) XX(NONE) XX(HELP) XX(QUIT) XX(QUIT_NO_CHDIR) \
 	XX(ENTER) XX(OPEN) XX(CHOOSE) XX(CHOOSE_FULL) \
-	XX(VIEW_RAW) XX(VIEW) XX(EDIT) XX(SORT_LEFT) XX(SORT_RIGHT) \
+	XX(VIEW_RAW) XX(VIEW) XX(EDIT) XX(EDIT_RAW) XX(SORT_LEFT) XX(SORT_RIGHT) \
 	XX(SELECT) XX(DESELECT) XX(SELECT_TOGGLE) XX(SELECT_ABORT) \
 	XX(UP) XX(DOWN) XX(TOP) XX(BOTTOM) XX(HIGH) XX(MIDDLE) XX(LOW) \
 	XX(PAGE_PREVIOUS) XX(PAGE_NEXT) XX(SCROLL_UP) XX(SCROLL_DOWN) XX(CENTER) \
@@ -466,7 +466,7 @@ static map<Key, action> g_normal_actions {
 	{'t', ACTION_CHOOSE}, {'T', ACTION_CHOOSE_FULL},
 	{KEY (F (1)), ACTION_HELP}, {'h', ACTION_HELP},
 	{KEY (F (3)), ACTION_VIEW}, {KEY (F (13)), ACTION_VIEW_RAW},
-	{KEY (F (4)), ACTION_EDIT},
+	{KEY (F (4)), ACTION_EDIT}, {KEY (F (14)), ACTION_EDIT_RAW},
 	{'q', ACTION_QUIT}, {ALT | 'q', ACTION_QUIT_NO_CHDIR},
 	// M-o ought to be the same shortcut the navigator is launched with
 	{ALT | 'o', ACTION_QUIT}, {'<', ACTION_SORT_LEFT}, {'>', ACTION_SORT_RIGHT},
@@ -1081,9 +1081,16 @@ fun sdn_view (const string &filename) {
 		(const char *) getenv ("PAGER"), "less", "cat"}, filename);
 }
 
-fun edit (const string &filename) {
-	run_program ({(const char *) getenv ("VISUAL"),
-		(const char *) getenv ("EDITOR"), "vi"}, filename);
+fun edit_raw (const string &filename) {
+	run_program ({
+		(const char *) getenv ("VISUAL"), (const char *) getenv ("EDITOR"),
+		"vi"}, filename);
+}
+
+fun sdn_edit (const string &filename) {
+	run_program ({(const char *) getenv ("SDN_EDITOR"), "sdn-edit",
+		(const char *) getenv ("VISUAL"), (const char *) getenv ("EDITOR"),
+		"vi"}, filename);
 }
 
 fun run_pager (FILE *contents) {
@@ -1550,7 +1557,10 @@ fun handle (Key k) -> bool {
 		(is_directory ? change_dir : sdn_view) (current.filename);
 		break;
 	case ACTION_EDIT:
-		edit (current.filename);
+		sdn_edit (current.filename);
+		break;
+	case ACTION_EDIT_RAW:
+		edit_raw (current.filename);
 		break;
 	case ACTION_HELP:
 		show_help ();