Support cd on quit

README.md

@@ -33,6 +33,7 @@ Noice is Not Noice, a noicer fork...
   - [File type abbreviations](#file-type-abbreviations)
   - [Help](#help)
 - [How to](#how-to)
+  - [cd on quit](#cd-on-quit)
   - [Copy current file path to clipboard](#copy-current-file-path-to-clipboard)
   - [Change file associations](#change-file-associations)
 - [Developers](#developers)
@@ -90,6 +91,7 @@ I chose to fork because:
   - Removed navigation restriction with relative paths (and let permissions handle it)
   - Sort entries by file size (largest to smallest)
   - Shortcut to invoke file name copier (set using environment variable `NNN_COPIER`)
+  - Change to last visited directory on quit
 
 #### File association
   - Set `NNN_OPENER` to let a desktop opener handle it all. E.g.:
@@ -141,7 +143,7 @@ nnn vs. ranger memory usage while viewing a directory with 10,178 files, sorted
 
 nnn needs libncursesw on Linux (or ncurses on OS X) and standard libc.
 
-- If you are using Homebrew, run:
+- If you are using **Homebrew**, run:
 
       brew install jarun/nnn/nnn
 - Packages are available on
@@ -219,6 +221,7 @@ Add the following to your shell's rc file for the best experience:
 | `^L` | Force a redraw |
 | `?` | Toggle help screen |
 | `q` | Quit |
+| `Q` | Quit and change directory |
 
 #### Filters
 
@@ -251,6 +254,12 @@ To lookup keyboard shortcuts at runtime, press `?`.
 
 ### How to
 
+#### cd on quit
+
+Pick the appropriate file for your shell from [misc/quitcd](https://github.com/jarun/nnn/tree/master/misc/quitcd) and add the contents to your shell's rc file. You'll need to spawn a new shell for the change to take effect. You should start nnn as `n` (or modify the function name to something else).
+
+As you might notice, nnn uses the environment variable `NNN_TMPFILE` to write the last visited directory path. You can change it.
+
 #### Copy current file path to clipboard
 
 nnn can pipe the absolute path of the current file to a copier script. For example, you can use `xsel` on Linux or `pbcopy` on OS X.

config.def.h

@@ -25,6 +25,7 @@ struct assoc assocs[] = {
 struct key bindings[] = {
 	/* Quit */
 	{ 'q',            SEL_QUIT,      "",     "" },
+	{ 'Q',            SEL_CDQUIT,    "",     "" },
 	/* Back */
 	{ KEY_BACKSPACE,  SEL_BACK,      "",     "" },
 	{ KEY_LEFT,       SEL_BACK,      "",     "" },

misc/quitcd/quitcd.bash

@@ -0,0 +1,10 @@
+export NNN_TMPFILE="/tmp/nnn"
+
+n()
+{
+        nnn -d
+        if [ -f $NNN_TMPFILE ]; then
+                . $NNN_TMPFILE
+                rm $NNN_TMPFILE
+        fi
+}

misc/quitcd/quitcd.fish

@@ -0,0 +1,9 @@
+export NNN_TMPFILE="/tmp/nnn"
+
+function n --description 'support nnn quit and change directory'
+        nnn -d
+        if test -e $NNN_TMPFILE
+                . $NNN_TMPFILE
+                rm $NNN_TMPFILE
+        end
+end

misc/quitcd/quitcd.zsh

@@ -0,0 +1,10 @@
+export NNN_TMPFILE="/tmp/nnn"
+
+n()
+{
+        nnn -d
+        if [ -f $NNN_TMPFILE ]; then
+                . $NNN_TMPFILE
+                rm $NNN_TMPFILE
+        fi
+}

nnn.1

@@ -79,6 +79,8 @@ Force a redraw
 Toggle help screen
 .It Ic q
 Quit
+.It Ic Q
+Quit and change directory
 .El
 .Pp
 Backing up one directory level will set the cursor position at the
@@ -105,6 +107,12 @@ is configured by modifying
 and recompiling the code.
 .Pp
 See the environment and examples sections below for more options and information.
+.Pp
+Configuring
+.Nm
+to change to the last visited directory on quit requires shell integration in a
+few easy steps. Please visit the project page (linked below) for the
+instructions.
 .Sh FILTERS
 Filters support regexes to display only the matched
 entries in the current directory view.  This effectively allows
@@ -117,8 +125,7 @@ An empty filter expression resets the filter.
 .Pp
 If
 .Nm
-is invoked as root the default filter will also match hidden
+is invoked as root the default filter will also match hidden files.
-files.
 .Sh ENVIRONMENT
 The SHELL, EDITOR and PAGER environment variables take precedence
 when dealing with the !, e and p commands respectively.

nnn.c

@@ -72,6 +72,7 @@ struct assoc {
 /* Supported actions */
 enum action {
 	SEL_QUIT = 1,
+	SEL_CDQUIT,
 	SEL_BACK,
 	SEL_GOIN,
 	SEL_FLTR,
@@ -129,7 +130,7 @@ static off_t blk_size;
 static size_t fs_free;
 static int open_max;
 static const double div_2_pow_10 = 1.0 / 1024.0;
-static const char* size_units[] = {"B", "K", "M", "G", "T", "P", "E", "Z", "Y"};
+static const char *size_units[] = {"B", "K", "M", "G", "T", "P", "E", "Z", "Y"};
 
 /*
  * Layout:
@@ -937,7 +938,8 @@ show_help(void)
     ^K                          Invoke file name copier\n\
     ^L                          Force a redraw\n\
     ?                           Toggle help screen\n\
-    q                           Quit\n");
+    q                           Quit\n\
+    Q                           Quit and change directory\n");
 
 	/* Show exit keys */
 	printw("\n\n    << (?/q)");
@@ -1242,6 +1244,17 @@ begin:
 nochange:
 		sel = nextsel(&run, &env);
 		switch (sel) {
+		case SEL_CDQUIT:
+		{
+			char *tmpfile = getenv("NNN_TMPFILE");
+			if (tmpfile) {
+				FILE *fp = fopen(tmpfile, "w");
+				if (fp) {
+					fprintf(fp, "cd \"%s\"", path);
+					fclose(fp);
+				}
+			}
+		}
 		case SEL_QUIT:
 			dentfree(dents);
 			return;