update readme, added http port flag, add buildroot package files

README.md

@@ -1,2 +1,22 @@
 # go-simple-http-server
-Super simple golang HTTP
+
+Super simple golang HTTP server with example systemd service file and buildroot package.
+
+## Buildroot
+
+Copy the files buildroot/* using the same directory structure into your buildroot directory.
+
+Add the following line to the buildroot/package/Config.in file typically under the 'menu "Miscellaneous"' line.
+
+`source "package/go-simple-http-server/Config.in"`
+
+Run `make menuconfig` and enable your new 'go-simple-http-server' under Packages -> Miscellaneous.
+
+## Usage
+```
+Usage of go-simple-http-server:
+  -port int
+        http port (default 80)
+  -www string
+        directory with files to be served (default "www")
+```

buildroot/package/go-simple-http-server/Config.in

@@ -0,0 +1,4 @@
+config BR2_PACKAGE_GO_SIMPLE_HTTP_SERVER
+        bool "go-simple-http-server"
+        help
+          Super simple go http server to prove golang apps can be built with buildroot

buildroot/package/go-simple-http-server/go-simple-http-server.mk

@@ -0,0 +1,37 @@
+################################################################################
+#
+# Go Simple Http Server
+#
+################################################################################
+
+GO_SIMPLE_HTTP_SERVER_VERSION = 0.4
+GO_SIMPLE_HTTP_SERVER_SITE = $(call github,kgolding,go-simple-http-server,$(GO_SIMPLE_HTTP_SERVER_VERSION))
+GO_SIMPLE_HTTP_SERVER_LICENSE = MIT
+GO_SIMPLE_HTTP_SERVER_LICENSE_FILES = LICENSE
+
+GO_SIMPLE_HTTP_SERVER_DESTDIR = /usr/share/go-simple-http-server
+
+# Remove go DWARF dubgging table to shrink the binary a bit
+GO_SIMPLE_HTTP_SERVER_LDFLAGS = -s -w
+
+define GO_SIMPLE_HTTP_SERVER_PRE_INSTALL_TARGET_HOOKS
+    # Create directory
+    $(INSTALL) -d $(TARGET_DIR)$(GO_SIMPLE_HTTP_SERVER_DESTDIR)/www/
+    # Install www assets
+    find $(@D)/www/ -type f -exec $(INSTALL) -m 0644 -D "{}" $(TARGET_DIR)$(GO_SIMPLE_HTTP_SERVER_DESTDIR)/www/ \;
+endef
+
+# Add Systemd service
+define GO_SIMPLE_HTTP_SERVER_INSTALL_INIT_SYSTEMD
+    # Install systemd service file
+    $(INSTALL) -D -m 0644 $(@D)/systemd.service \
+        $(TARGET_DIR)/usr/lib/systemd/system/go-simple-http-server.service
+
+    # Enable the service to auto start by symlinking the file
+    mkdir -p $(TARGET_DIR)/etc/systemd/system/multi-user.target.wants
+    ln -sf /usr/lib/systemd/system/go-simple-http-server.service \
+        $(TARGET_DIR)//etc/systemd/system/multi-user.target.wants/go-simple-http-server.service
+endef
+
+# The binary will be installed as /usr/bin/go-simple-http-server
+$(eval $(golang-package))

main.go

@@ -5,17 +5,22 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"strconv"
 )
 
 func main() {
 	wwwDir := flag.String("www", "www", "directory with files to be served")
+	wwwPort := flag.Int("port", 80, "http port")
+
+	flag.Parse()
 
 	log.Printf("Serving files from '%s'", *wwwDir)
 
 	http.HandleFunc("/hello", handler)
 	http.Handle("/", http.StripPrefix("/", http.FileServer(http.Dir(*wwwDir))))
 
-	err := http.ListenAndServe(":8080", nil)
+	log.Printf("Starting HTTP server on port %d", *wwwPort)
+	err := http.ListenAndServe(":"+strconv.Itoa(*wwwPort), nil)
 	if err != nil {
 		log.Fatal(err.Error())
 	}

systemd.service

@@ -7,7 +7,7 @@ Type=simple
 Restart=always
 RestartSec=1
 User=root
-ExecStart=/usr/bin/go-simple-http-server -www /usr/share/go-simple-http-server/www
+ExecStart=/usr/bin/go-simple-http-server -port 80 -www /usr/share/go-simple-http-server/www
 
 [Install]
 WantedBy=multi-user.target