Replace wlr_log with sway_log

This commit mostly duplicates the wlr_log functions, although
with a sway_* prefix. (This is very similar to PR #2009.)
However, the logging function no longer needs to be replaceable,
so sway_log_init's second argument is used to set the exit
callback for sway_abort.

wlr_log_init is still invoked in sway/main.c

This commit makes it easier to remove the wlroots dependency for
the helper programs swaymsg, swaybg, swaybar, and swaynag.

1 files changed, 38 insertions, 6 deletions

diff --git a/include/log.h b/include/log.h
index 6fb2f277..adf431ab 100644
--- a/include/log.h
+++ b/include/log.h
@@ -1,7 +1,18 @@
 #ifndef _SWAY_LOG_H
 #define _SWAY_LOG_H
+
 #include <stdbool.h>
-#include <wlr/util/log.h>
+#include <stdarg.h>
+#include <string.h>
+#include <errno.h>
+
+typedef enum {
+        SWAY_SILENT = 0,
+        SWAY_ERROR = 1,
+        SWAY_INFO = 2,
+        SWAY_DEBUG = 3,
+        SWAY_LOG_IMPORTANCE_LAST,
+} sway_log_importance_t;
 
 #ifdef __GNUC__
 #define ATTRIB_PRINTF(start, end) __attribute__((format(printf, start, end)))
@@ -9,14 +20,35 @@
 #define ATTRIB_PRINTF(start, end)
 #endif
 
+void error_handler(int sig);
+
+typedef void (*terminate_callback_t)(int exit_code);
+
+// Will log all messages less than or equal to `verbosity`
+// The `terminate` callback is called by `sway_abort`
+void sway_log_init(sway_log_importance_t verbosity, terminate_callback_t terminate);
+
+void _sway_log(sway_log_importance_t verbosity, const char *format, ...) ATTRIB_PRINTF(2, 3);
+void _sway_vlog(sway_log_importance_t verbosity, const char *format, va_list args) ATTRIB_PRINTF(2, 0);
 void _sway_abort(const char *filename, ...) ATTRIB_PRINTF(1, 2);
+bool _sway_assert(bool condition, const char* format, ...) ATTRIB_PRINTF(2, 3);
+
+// TODO: get meson to precompute this, for better reproducibility/less overhead
+const char *_sway_strip_path(const char *filepath);
+
+#define sway_log(verb, fmt, ...) \
+        _sway_log(verb, "[%s:%d] " fmt, _sway_strip_path(__FILE__), __LINE__, ##__VA_ARGS__)
+
+#define sway_vlog(verb, fmt, args) \
+        _sway_vlog(verb, "[%s:%d] " fmt, _sway_strip_path(__FILE__), __LINE__, args)
+
+#define sway_log_errno(verb, fmt, ...) \
+        sway_log(verb, fmt ": %s", ##__VA_ARGS__, strerror(errno))
+
 #define sway_abort(FMT, ...) \
-    _sway_abort("[%s:%d] " FMT, _wlr_strip_path(__FILE__), __LINE__, ##__VA_ARGS__)
+        _sway_abort("[%s:%d] " FMT, _sway_strip_path(__FILE__), __LINE__, ##__VA_ARGS__)
 
-bool _sway_assert(bool condition, const char* format, ...) ATTRIB_PRINTF(2, 3);
 #define sway_assert(COND, FMT, ...) \
-        _sway_assert(COND, "[%s:%d] %s:" FMT, _wlr_strip_path(__FILE__), __LINE__, __func__, ##__VA_ARGS__)
-
-void error_handler(int sig);
+        _sway_assert(COND, "[%s:%d] %s:" FMT, _sway_strip_path(__FILE__), __LINE__, __PRETTY_FUNCTION__, ##__VA_ARGS__)
 
 #endif