Resurrect NNN_OPENER

README.md

@@ -372,6 +372,10 @@ The following indicators are used in the detail view:
 | $PAGER | page through files (fallback less) |
 | $SHELL | spawn a shell, run script (fallback sh) |
 
+To specify a custom file opener:
+
+    export NNN_OPENER=mimeopen
+
 To edit all text files in EDITOR (preferably CLI, fallback vi):
 
     export NNN_USE_EDITOR=1

nnn.1

@@ -260,6 +260,11 @@ To list the file paths copied to memory press \fIy\fR.
 The SHELL, EDITOR (VISUAL, if defined) and PAGER environment variables take precedence
 when dealing with the !, e and p commands respectively. A single combination to arguments is supported for SHELL and PAGER.
 .Pp
+\fBNNN_OPENER:\fR specify a custom file opener.
+.Bd -literal
+    export NNN_OPENER=mimeopen
+.Ed
+.Pp
 \fBNNN_BMS:\fR bookmark string as \fIkey_char:location\fR pairs (max 10) separated by
 \fI;\fR:
 .Bd -literal

src/nnn.c

@@ -297,6 +297,7 @@ static char *pnamebuf, *pcopybuf;
 static int ndents, cur, total_dents = ENTRY_INCR;
 static uint idle;
 static uint idletimeout, copybufpos, copybuflen;
+static char *opener;
 static char *copier;
 static char *editor;
 static char *pager, *pager_arg;
@@ -2157,6 +2158,8 @@ static bool show_help(char *path)
 		dprintf(fd, "\n");
 	}
 
+	if (getenv("NNN_OPENER"))
+		dprintf(fd, "NNN_OPENER: %s\n", opener);
 	if (cfg.useeditor)
 		dprintf(fd, "NNN_USE_EDITOR: 1\n");
 	if (getenv("NNN_CONTEXT_COLORS"))
@@ -2793,7 +2796,7 @@ nochange:
 				}
 
 				/* Invoke desktop opener as last resort */
-				spawn(utils[OPENER], newpath, NULL, NULL, F_NOWAIT | F_NOTRACE);
+				spawn(opener, newpath, NULL, NULL, F_NOWAIT | F_NOTRACE);
 				continue;
 			}
 			default:
@@ -3767,6 +3770,11 @@ int main(int argc, char *argv[])
 	}
 #endif
 
+	/* Get custom opener, if set */
+	opener = getenv("NNN_OPENER");
+	if (!opener)
+		opener = utils[OPENER];
+
 	/* Get locker wait time, if set; copier used as tmp var */
 	copier = getenv("NNN_IDLE_TIMEOUT");
 	if (copier) {