1 files changed, 74 insertions, 0 deletions
diff --git a/lib/dpkg/color.c b/lib/dpkg/color.c
new file mode 100644
index 0000000..9a33f12
--- /dev/null
+++ b/lib/dpkg/color.c
@@ -0,0 +1,74 @@
+/*
+ * libdpkg - Debian packaging suite library routines
+ * color.c - color support
+ *
+ * Copyright © 2015-2016 Guillem Jover <guillem@debian.org>
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <compat.h>
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <dpkg/macros.h>
+#include <dpkg/color.h>
+
+static enum color_mode color_mode = COLOR_MODE_UNKNOWN;
+static bool use_color = false;
+
+bool
+color_set_mode(const char *mode)
+{
+	if (strcmp(mode, "auto") == 0) {
+		color_mode = COLOR_MODE_AUTO;
+		use_color = isatty(STDOUT_FILENO);
+	} else if (strcmp(mode, "always") == 0) {
+		color_mode = COLOR_MODE_ALWAYS;
+		use_color = true;
+	} else {
+		color_mode = COLOR_MODE_NEVER;
+		use_color = false;
+	}
+
+	return use_color;
+}
+
+static bool
+color_enabled(void)
+{
+	const char *mode;
+
+	if (color_mode != COLOR_MODE_UNKNOWN)
+		return use_color;
+
+	mode = getenv("DPKG_COLORS");
+	if (mode == NULL)
+		mode = "auto";
+
+	return color_set_mode(mode);
+}
+
+const char *
+color_get(const char *color)
+{
+	if (!color_enabled())
+		return "";
+
+	return color;
+}