muon fmt: editorconfig support

.editorconfig

@@ -12,3 +12,7 @@ insert_final_newline = true
 
 [{*.c,*.h,*.sh}]
 indent_style = tab
+
+[{meson.build,meson_options.txt}]
+indent_style = space
+indent_size = 4

doc/muon.1.scd

@@ -90,6 +90,8 @@ All commands accept a *-h* option which prints a brief summary of their usage.
 	- *-q* - exit with 1 if files would be modified by muon fmt
 	- *-i* - format files in-place
 	- *-c* <muon_fmt.ini> - read configuration from _muon\_fmt.ini_
+	- *-e* - try to read configuration from .editorconfig.  Only indentation
+	related settings are recognized.
 
 	*CONFIGURATION OPTIONS*
 [[ *key*

include/formats/editorconfig.h

@@ -0,0 +1,16 @@
+/*
+ * SPDX-FileCopyrightText: Stone Tickle <[email protected]>
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#ifndef MUON_FORMATS_EDITORCONFIG_H
+#define MUON_FORMATS_EDITORCONFIG_H
+
+#include "platform/filesystem.h"
+
+struct editorconfig_opts {
+	const char *indent_by;
+};
+
+void try_parse_editorconfig(struct source *src, struct editorconfig_opts *opts);
+#endif

include/lang/fmt.h

@@ -10,5 +10,5 @@
 
 #include "lang/parser.h"
 
-bool fmt(struct source *src, FILE *out, const char *cfg_path, bool check_only);
+bool fmt(struct source *src, FILE *out, const char *cfg_path, bool check_only, bool editorconfig);
 #endif

src/amalgam.c

@@ -31,6 +31,7 @@
 #include "external/libarchive_null.c"
 #include "external/libcurl_null.c"
 #include "external/samurai_null.c"
+#include "formats/editorconfig.c"
 #include "formats/ini.c"
 #include "formats/lines.c"
 #include "formats/tap.c"