feat: Add initial library

Makefile

@@ -2,31 +2,46 @@ PROJECT = lua_libpulse_glib
 PREFIX ?= /usr/local
 BUILD_DIR = out
 
-LUA_VERSION ?= 5.3
+LUA_VERSION ?= 5.1
 LUA ?= $(shell command -v lua$(LUA_VERSION))
 LUA_BINDIR ?= /usr/bin
-# LUA_LIBDIR ?= /usr/lib
+LUA_LIBDIR ?= /usr/lib/x86_64-linux-gnu/lua/$(LUA_VERSION)
 LUA_INCDIR ?= /usr/include/lua$(LUA_VERSION)
 
-INSTALL_BINDIR ?= $(PREFIX)/bin
+ifdef LIBDIR
+INSTALL_LIBDIR ?= $(LIBDIR)
+else
 INSTALL_LIBDIR ?= $(PREFIX)/lib/lua/$(LUA_VERSION)
+endif
+
+ifdef LUADIR
+INSTALL_LUADIR ?= $(LUADIR)
+else
 INSTALL_LUADIR ?= $(PREFIX)/share/lua/$(LUA_VERSION)
-INSTALL_CONFDIR ?= $(PREFIX)/etc
+endif
+
+ifdef DOCDIR
+INSTALL_DOCDIR ?= $(DOCDIR)
+else
+INSTALL_DOCDIR ?= $(PREFIX)/share/doc/$(PROJECT)
+endif
 
 CC = gcc
 PKG_CONFIG ?= $(shell command -v pkg-config)
 
-PKGS = glib-2.0 gobject-2.0 lua$(LUA_VERSION)
+PKGS = libpulse-mainloop-glib glib-2.0 gobject-2.0 gobject-introspection-1.0 lua$(LUA_VERSION)
 
 CFLAGS ?= -fPIC
 LIBFLAG ?= -shared
 
 CCFLAGS ?= $(CFLAGS)
-CCFLAGS += -Wall -g $(shell $(PKG_CONFIG) --cflags $(PKGS)) -I$(LUA_INCDIR)
+CCFLAGS += -Wall -g -rdynamic $(shell $(PKG_CONFIG) --cflags $(PKGS)) -I$(LUA_INCDIR) -I"./"
 
-LIBS = -L"$(LUA_LIBDIR)" -L$(shell dirname "$(shell $(CC) -print-libgcc-file-name)")
+LIBS = -L$(shell dirname "$(shell $(CC) -print-libgcc-file-name)") -L"$(LUA_LIBDIR)" -L"./"
 LIBS += $(shell $(PKG_CONFIG) --libs $(PKGS))
-OBJS = $(shell find src -type f -iname '*.c' | sed 's/\(.*\)\.c$$/$(BUILD_DIR)\/\1\.so/')
+OBJS = $(shell find src -type f -iname '*.c' | sed 's/\(.*\)\.c$$/$(BUILD_DIR)\/\1\.o/')
+
+TARGET = $(BUILD_DIR)/$(PROJECT).so
 
 ifdef CI
 CHECK_ARGS ?= --formatter TAP
@@ -37,14 +52,14 @@ endif
 
 .PHONY: clean doc doc-content doc-styles install test check rock
 
-build: $(OBJS)
+build: $(TARGET)
 
 $(BUILD_DIR)/%.o: %.c
 	@mkdir -p $(shell dirname "$@")
 	$(CC) -c $(CCFLAGS) $< -o $@
 
-%.so: %.o
+$(TARGET): $(OBJS)
-	$(CC) $(LIBFLAG) -o $@ $< $(LIBS)
+	$(CC) $(LIBFLAG) -o $@ $(OBJS) $(LIBS)
 
 doc-styles:
 	@printf "\e[1;97mGenerate stylesheet\e[0m\n"
@@ -66,18 +81,15 @@ clean:
 	rm -r out/
 
 install: build doc
-	@printf "\e[1;97mInstall C libraries\e[0m\n"
+	@printf "\e[1;97mInstall C library\e[0m\n"
-	find $(BUILD_DIR)/src -type f -iname '*.so' | xargs install -vDm 644 -t $(INSTALL_LIBDIR)/$(PROJECT)
+	xargs install -vDm 644 -t $(INSTALL_LIBDIR)/$(PROJECT) $(TARGET)
-
-	@printf "\e[1;97mInstall Lua libraries\e[0m\n"
-	find src/ -type f -iname '*.lua' | xargs install -vDm 644 -t $(INSTALL_LUADIR)/$(PROJECT)
 
 	@printf "\e[1;97mInstall documentation\e[0m\n"
-	install -vd $(PREFIX)/share/doc/$(PROJECT)
+	install -vd $(INSTALL_DOCDIR)
-	cp -vr $(BUILD_DIR)/doc/* $(PREFIX)/share/doc/$(PROJECT)
+	cp -vr $(BUILD_DIR)/doc/* $(INSTALL_DOCDIR)
 
 check:
-	find src/ -iname '*.lua' | xargs luacheck $(CHECK_ARGS)
+	@echo "Nothing to do"
 
 test:
 	busted --config-file=.busted.lua --lua=$(LUA) $(TEST_ARGS)

rocks/lua-libpulse-glib-scm-1.rockspec

@@ -33,6 +33,7 @@ build = {
         INSTALL_LIBDIR="$(LIBDIR)",
         INSTALL_LUADIR="$(LUADIR)",
         INSTALL_CONFDIR="$(CONFDIR)",
+        INSTALL_DOCDIR="$(DOCDIR)",
     },
     copy_directories = {
         "spec"

src/lua_libpulse_glib/pulseaudio.c

@@ -0,0 +1,93 @@
+/// libpulse bindings.
+//
+// @module pulseaudio
+
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+#include <pulse/glib-mainloop.h>
+
+#define LUA_MOD_EXPORT extern
+#define LUA_PULSEAUDIO "pulseaudio"
+
+
+#if LUA_VERSION_NUM <= 501
+// Shamelessly copied from Lua 5.3 source.
+// TODO: Is there any official way to do this in 5.1?
+void luaL_setfuncs (lua_State *L, const luaL_Reg *l, int nup) {
+    luaL_checkstack(L, nup, "too many upvalues");
+    for (; l->name != NULL; l++) {  /* fill the table with given functions */
+        if (l->func == NULL)  /* place holder? */
+            lua_pushboolean(L, 0);
+        else {
+            int i;
+            for (i = 0; i < nup; i++)  /* copy upvalues to the top */
+                lua_pushvalue(L, -nup);
+            lua_pushcclosure(L, l->func, nup);  /* closure with those upvalues */
+        }
+        lua_setfield(L, -(nup + 2), l->name);
+    }
+    lua_pop(L, nup);  /* remove upvalues */
+}
+
+
+#define luaL_newlib(L,l) (luaL_register(L,LUA_PULSEAUDIO,l))
+#endif
+
+
+typedef struct pulseaudio {
+    pa_glib_mainloop* mainloop;
+} pulseaudio;
+
+
+/**
+ * Creates a new PulseAudio object.
+ *
+ * The API requires a GLib Main Context internally. Currently, only the default context
+ * is supported.
+ *
+ * @return[type=PulseAudio]
+ */
+static int
+pulseaudio_new(lua_State* L)
+{
+    GMainContext* ctx = g_main_context_default();
+    if (ctx == NULL) {
+        lua_pushfstring(L, "Failed to accquire default GLib Main Context. Are we running in a Main Loop?");
+        lua_error(L);
+        return 0;
+    }
+
+    pulseaudio* pa = lua_newuserdata (L, sizeof(pulseaudio));
+    if (!pa) {
+        return luaL_error(L, "failed to create pulseaudio userdata");
+    }
+    luaL_getmetatable(L, LUA_PULSEAUDIO);
+    lua_setmetatable(L, -2);
+
+    pa->mainloop = pa_glib_mainloop_new(ctx);
+
+    return 1;
+}
+
+
+// TODO: Implement `__gc` meta method to free the inner `pa_glib_mainloop`
+static const struct luaL_Reg pulseaudio_mt [] = {
+    {NULL, NULL}
+};
+
+
+static const struct luaL_Reg pulseaudio_lib [] = {
+    {"new", pulseaudio_new},
+    {NULL, NULL}
+};
+
+
+LUA_MOD_EXPORT int luaopen_lua_libpulse_glib(lua_State* L)
+{
+    luaL_newmetatable(L, LUA_PULSEAUDIO);
+    luaL_setfuncs(L, pulseaudio_mt, 0);
+
+    luaL_newlib(L, pulseaudio_lib);
+    return 1;
+}