Setting PWD: set on use case, not on browse

This moves setting PWD environment variable closer to the places where child process (that needs PWD correctly set) is started instead of start it on browse.

patches/restorepreview/mainline.diff

@@ -238,7 +238,7 @@ index 0388b23c..66d3316a 100644
  		case SEL_PROMPT:
 +			if (g_state.previewer)
 +				notify_fifo(FALSE, TRUE);
- 			r = handle_cmd(sel, newpath);
+ 			r = handle_cmd(sel, path, newpath);
 +			if (g_state.previewer) {
 +				pkey = previewkey;
 +				goto run_plugin;

src/nnn.c

@@ -5237,7 +5237,7 @@ static void show_help(const char *path)
 	unlink(g_tmpfpath);
 }
 
-static void setexports(void)
+static void setexports(const char *path)
 {
 	char dvar[] = "d0";
 	char fvar[] = "f0";
@@ -5261,6 +5261,7 @@ static void setexports(void)
 	}
 	setenv("NNN_INCLUDE_HIDDEN", xitoa(cfg.showhidden), 1);
 	setenv("NNN_PREFER_SELECTION", xitoa(cfg.prefersel), 1);
+	setenv("PWD", path, 1);
 }
 
 static void run_cmd_as_plugin(const char *file, uchar_t flags)
@@ -5391,7 +5392,7 @@ static bool run_plugin(char **path, const char *file, char *runfile, char **last
 		g_state.pluginit = 1;
 	}
 
-	setexports();
+	setexports(*path);
 
 	/* Check for run-cmd-as-plugin mode */
 	if (*file == '!') {
@@ -5565,14 +5566,14 @@ static bool prompt_run(void)
 	return ret;
 }
 
-static bool handle_cmd(enum action sel, char *newpath)
+static bool handle_cmd(enum action sel, char *path, char *newpath)
 {
 	endselection(FALSE);
 
 	if (sel == SEL_LAUNCH)
 		return launch_app(newpath);
 
-	setexports();
+	setexports(path);
 
 	if (sel == SEL_PROMPT)
 		return prompt_run();
@@ -6835,8 +6836,6 @@ begin:
 		setdirwatch();
 	}
 
-	setenv("PWD", path, TRUE);
-
 #ifndef NOX11
 	xterm_cfg(path);
 #endif
@@ -7969,7 +7968,7 @@ nochange:
 		case SEL_SHELL: // fallthrough
 		case SEL_LAUNCH: // fallthrough
 		case SEL_PROMPT:
-			r = handle_cmd(sel, newpath);
+			r = handle_cmd(sel, path, newpath);
 
 			/* Continue in type-to-nav mode, if enabled */
 			if (cfg.filtermode)