2014-03-01 Chris Allegretta <chrisa@asty.org>

* global.c (shortcut_init) - fix an issue with the split
          do_research() setup when using --enable-tiny
        * rcfile.c (parse_linter) - Allow linter to be unset using ""
        * rcfile.c - Allow syntaxes to be extended via "extendsyntax"
          directive.  Color, header, magic and linter should all be
          able to be extended.  Man page updates for nanorc(5).
        * doc/nanorc.sample.in - Document 'set quiet'



git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4630 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -1,3 +1,12 @@
+2014-03-01 Chris Allegretta <chrisa@asty.org>
+	* global.c (shortcut_init) - fix an issue with the split
+	  do_research() setup when using --enable-tiny
+	* rcfile.c (parse_linter) - Allow linter to be unset using ""
+	* rcfile.c - Allow syntaxes to be extended via "extendsyntax"
+	  directive.  Color, header, magic and linter should all be
+	  able to be extended.  Man page updates for nanorc(5).
+	* doc/nanorc.sample.in - Document 'set quiet'
+
 2014-03-01  Mike Frysinger  <vapier@gentoo.org>
 	* src/color.c (color_update) - Do not write to stderr on magic
 	errors.  If the magic db has errors such that magic_load() fails,

doc/man/nanorc.5

@@ -287,6 +287,13 @@ Same as above, except that the expression matching is case insensitive.
 Read in self-contained color syntaxes from \fIsyntaxfile\fP.  Note that
 \fIsyntaxfile\fP can only contain \fBsyntax\fP, \fBcolor\fP, and
 \fBicolor\fP commands.
+.TP
+.B extendsyntax \fIstr\fP \fIdirective\fP [ \fIarg\fP ... ]
+Extend the syntax previously defined as \fIstr\fP to include
+new information.  Allows you to add a new \fIcolor\fP, \fIicolor\fP,
+\fImagic\fP, \fIheader\fP, or \fIlinter\fP directive to a syntax
+defined.  Useful when you want to add to definitions from the
+system-installed syntax definitions (which are normally not writable).
 
 .SH KEY BINDINGS
 Key bindings may be reassigned via the following commands:

doc/nanorc.sample.in

@@ -15,6 +15,11 @@
 ## its end.  For example, for the "brackets" option, ""')>]}" will match
 ## ", ', ), >, ], and }.
 
+## Silently ignore problems with unknown directives in the nanorc file.
+## Useful when your nanorc file might be read on systems with multiple
+## versions of nano installed (e.g. your home directory is on NFS)
+# set quiet
+
 ## Use auto-indentation.
 # set autoindent
 

src/global.c

@@ -789,8 +789,10 @@ void shortcut_init(bool unjustify)
     add_to_funcs(do_search, MMAIN|MBROWSER, whereis_msg,
 	IFSCHELP(nano_whereis_msg), FALSE, VIEW);
 
+#ifndef NANO_TINY
     add_to_funcs(do_research, MBROWSER, whereis_next_msg,
 	IFSCHELP(nano_whereis_next_msg), TRUE, VIEW);
+#endif /* NANO_TINY */
 
 #ifndef DISABLE_JUSTIFY
     /* TRANSLATORS: Try to keep this at most 10 characters. */

src/rcfile.c

@@ -834,6 +834,9 @@ void parse_colors(char *ptr, bool icase)
 #ifdef DEBUG
 		fprintf(stderr, "Adding new entry for fg %hd, bg %hd\n", fg, bg);
 #endif
+		/* Need to recompute endcolor now so we can extend colors to syntaxes */
+		for (endcolor = endsyntax->color; endcolor->next != NULL; endcolor = endcolor->next)
+			;
 		endcolor->next = newcolor;
 	    }
 
@@ -962,7 +965,11 @@ void parse_linter(char *ptr)
     if (endsyntax->linter != NULL)
 	free(endsyntax->linter);
 
-    endsyntax->linter = mallocstrcpy(syntaxes->linter, ptr);
+    /* Let them unset the linter by using "" */
+    if (!strcmp(ptr, "\"\""))
+	endsyntax->linter = NULL;
+    else
+	endsyntax->linter = mallocstrcpy(syntaxes->linter, ptr);
 }
 #endif /* ENABLE_COLOR */
 
@@ -1007,6 +1014,9 @@ void parse_rcfile(FILE *rcstream
     char *buf = NULL;
     ssize_t len;
     size_t n = 0;
+#ifdef ENABLE_COLOR
+    syntaxtype *end_syn_save = NULL;
+#endif
 
     while ((len = getline(&buf, &n, rcstream)) > 0) {
 	char *ptr, *keyword, *option;
@@ -1031,6 +1041,28 @@ void parse_rcfile(FILE *rcstream
 	keyword = ptr;
 	ptr = parse_next_word(ptr);
 
+
+	/* Handle extending first... */
+	if (strcasecmp(keyword, "extendsyntax") == 0) {
+	    char *syntaxname = ptr;
+	    syntaxtype *ts = NULL;
+
+	    ptr = parse_next_word(ptr);
+	    for (ts = syntaxes; ts != NULL; ts = ts->next)
+		if (!strcmp(ts->desc, syntaxname))
+		    break;
+
+	    if (ts == NULL) {
+		rcfile_error(N_("Could not find syntax \"%s\" to extend"), syntaxname);
+		continue;
+	    } else {
+		end_syn_save = endsyntax;
+		endsyntax = ts;
+		keyword = ptr;
+		ptr = parse_next_word(ptr);
+	    }
+	}
+
 	/* Try to parse the keyword. */
 	if (strcasecmp(keyword, "set") == 0) {
 #ifdef ENABLE_COLOR
@@ -1084,6 +1116,15 @@ void parse_rcfile(FILE *rcstream
 	else
 	    rcfile_error(N_("Command \"%s\" not understood"), keyword);
 
+#ifdef ENABLE_COLOR
+	/* If we temporarily reset emdsyntax to allow extending, reset
+	   the value here */
+	if (end_syn_save != NULL) {
+	    endsyntax = end_syn_save;
+	    end_syn_save = NULL;
+	}
+#endif
+
 	if (set == 0)
 	    continue;