[improve] Improve the project structure

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="AndroidLintDuplicateStrings" enabled="true" level="WARNING" enabled_by_default="true" />
+  </profile>
+</component>

.idea/misc.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MakefileSettings">
+    <option name="linkedExternalProjectsSettings">
+      <MakefileProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+          </set>
+        </option>
+        <option name="version" value="2" />
+      </MakefileProjectSettings>
+    </option>
+  </component>
+  <component name="MakefileWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

Makefile

@@ -1,5 +1,3 @@
-# See LICENSE file for copyright and license details
-# slstatus - suckless status monitor
 .POSIX:
 
 include config.mk
@@ -29,35 +27,49 @@ COM =\
 	components/volume \
 	components/wifi
 
-all: slstatus
+BUILD_DIR = build
+OBJ_DIR = $(BUILD_DIR)/obj
+SRC_DIR = src
 
-$(COM:=.o): config.mk $(REQ:=.h)
-slstatus.o: slstatus.c slstatus.h arg.h config.h config.mk $(REQ:=.h)
+COM_OBJ = $(COM:%=$(OBJ_DIR)/%.o)
+REQ_OBJ = $(REQ:%=$(OBJ_DIR)/%.o)
+SLSTATUS_OBJ = $(OBJ_DIR)/slstatus.o
 
-.c.o:
+all: $(BUILD_DIR)/slstatus
+
+$(COM_OBJ): $(OBJ_DIR)/%.o : $(SRC_DIR)/%.c $(REQ_OBJ) config.mk $(REQ:%=$(SRC_DIR)/%.h)
+	@mkdir -p $(@D)
+	$(CC) -o $@ -c $(CPPFLAGS) $(CFLAGS) $<
+
+$(REQ_OBJ): $(OBJ_DIR)/%.o : $(SRC_DIR)/%.c $(SRC_DIR)/%.h
+	@mkdir -p $(@D)
+	$(CC) -o $@ -c $(CPPFLAGS) $(CFLAGS) $<
+
+$(SLSTATUS_OBJ): $(SRC_DIR)/slstatus.c $(SRC_DIR)/slstatus.h $(SRC_DIR)/arg.h config.mk $(REQ_OBJ) $(REQ:%=$(SRC_DIR)/%.h)
+	@mkdir -p $(@D)
 	$(CC) -o $@ -c $(CPPFLAGS) $(CFLAGS) $<
 
 config.h:
 	cp config.def.h $@
 
-slstatus: slstatus.o $(COM:=.o) $(REQ:=.o)
-	$(CC) -o $@ $(LDFLAGS) $(COM:=.o) $(REQ:=.o) slstatus.o $(LDLIBS)
+$(BUILD_DIR)/slstatus: $(SLSTATUS_OBJ) $(COM_OBJ) $(REQ_OBJ)
+	$(CC) -o $@ $(LDFLAGS) $(SLSTATUS_OBJ) $(COM_OBJ) $(REQ_OBJ) $(LDLIBS)
 
 clean:
-	rm -f slstatus slstatus.o $(COM:=.o) $(REQ:=.o)
+	rm -rf $(BUILD_DIR)
 
 dist:
 	rm -rf "slstatus-$(VERSION)"
 	mkdir -p "slstatus-$(VERSION)/components"
 	cp -R LICENSE Makefile README config.mk config.def.h \
-	      arg.h slstatus.c $(COM:=.c) $(REQ:=.c) $(REQ:=.h) \
+		arg.h $(SRC_DIR)/slstatus.c $(COM:%=$(SRC_DIR)/%.c) $(REQ:%=$(SRC_DIR)/%.c) $(REQ:%=$(SRC_DIR)/%.h) \
 		slstatus.1 "slstatus-$(VERSION)"
 	tar -cf - "slstatus-$(VERSION)" | gzip -c > "slstatus-$(VERSION).tar.gz"
 	rm -rf "slstatus-$(VERSION)"
 
 install: all
 	mkdir -p "$(DESTDIR)$(PREFIX)/bin"
-	cp -f slstatus "$(DESTDIR)$(PREFIX)/bin"
+	cp -f $(BUILD_DIR)/slstatus "$(DESTDIR)$(PREFIX)/bin"
 	chmod 755 "$(DESTDIR)$(PREFIX)/bin/slstatus"
 	mkdir -p "$(DESTDIR)$(MANPREFIX)/man1"
 	cp -f slstatus.1 "$(DESTDIR)$(MANPREFIX)/man1"
@@ -66,3 +78,5 @@ install: all
 uninstall:
 	rm -f "$(DESTDIR)$(PREFIX)/bin/slstatus"
 	rm -f "$(DESTDIR)$(MANPREFIX)/man1/slstatus.1"
+
+.PHONY: all clean dist install uninstall