use colors

README.md

@@ -14,6 +14,7 @@
 [X] recursion
 [X] dryrun
 [X] use ${VIMDIREDITOR}
+[X] NO_COLOR / color
 
 ## SYNOPSIS
 **vidir** **[***options***]** **[**directory**]**
@@ -93,6 +94,11 @@ Editor to use.
 `rm` alternative to use.
 Set this to an appropriate executable to have move-to-trash behaviour on delete.
 
+**NO_COLOR**
+According to the no-color convention,
+if this variable is set and is not empty,
+no colors will be printed.
+
 ## NOTES
 The default editor is *Vi*.
 

source/error.c

@@ -6,18 +6,18 @@
 
 static
 void verror(const char * fmt, va_list argv) {
-    fdictatef(stderr, "vimdir: error: ");
+    fdictatef(stderr, "$rvimdir: error: ");
     vafdictatef(stderr, fmt, argv);
-    fdictate(stderr, "");
+    fdictate(stderr, "$0");
 }
 
 void warning(const char * fmt, ...) {
     va_list argv;
     va_start(argv, fmt);
 
-    fdictatef(stderr, "vimdir: warning: ");
+    fdictatef(stderr, "$yvimdir: warning: ");
     vafdictatef(stderr, fmt, argv);
-    fdictate(stderr, "");
+    fdictate(stderr, "$0");
 
     va_end(argv);
 }

source/opts.c

@@ -5,17 +5,27 @@
 #include <string.h>
 #include <getopt.h>
 #include "global.h"
+#include "dictate.h"
 
 void usage() {
-    puts("vimdir <path>");
-    puts("  -h : print help");
-    puts("  -n : dry run; do not modify files, just print operations");
-    puts("  -p : allow for editing permissions");
-    puts("  -o : allow for editing owner/group");
-    puts("  -r : recursive");
+    dictate(
+        "$B$gvimdir$0 $y[$boptions$y] <$bpath$y>$0\n"
+        "  $B$g-h$0 : print help\n"
+        "  $B$g-n$0 : dry run; do not modify files, just print operations\n"
+        "  $B$g-p$0 : allow for editing permissions\n"
+        "  $B$g-o$0 : allow for editing owner/group\n"
+        "  $B$g-r$0 : recursive"
+    );
 }
 
 void get_env(void) {
+  no_color:
+    char * no_color = getenv("NO_COLOR");
+    if (no_color
+    &&  no_color[0] != '\0') {
+        dictate_color_enabled(false);
+    }
+    
   set_editor:
     editor = getenv("VIMDIREDITOR");
     if (editor) { goto set_custom_rm; }