Add dev mode

Add dev mode: re-generate the html files each time that a input file is
modified, and serve them through an http server.

README.md

@@ -1,9 +1,23 @@
 # Blogo [![Go Report Card](https://goreportcard.com/badge/github.com/arnaucube/blogo)](https://goreportcard.com/report/github.com/arnaucube/blogo)
 Static blog generator, templating engine from markdown and html templates
 
-![blogo](https://raw.githubusercontent.com/arnaucube/blogo/master/blogo.png "blogo")
+![blogo](https://raw.githubusercontent.com/arnaucube/blogo/master/blogo-diagram.png "blogo-diagram")
+
+## Usage
+```
+Usage of blogo:
+  -d dev mode
+  -p port (only for dev mode) (default "8080")
+```
+
+So, for local usage:
+```
+blogo -d
+```
+Which will re-generate the html files each time that a input file is modified, and will serve the html generated site at `http://127.0.0.1:8080`.
+
+For a single use, you can simply use `blogo` command, which will generate the html files without serving them.
 
-## Use
 A complete usage example can be found in this repo: https://github.com/arnaucube/blogoExample
 
 ### Config example
@@ -20,7 +34,7 @@ A complete usage example can be found in this repo: https://github.com/arnaucube
 	    "md": "article0.md",
 	    "metaimg": "img/article0-img.png",
 	    "metadescr": "description of the article 0"
-	},
+	}
     ],
     "copyRaw": [
 	"css",

compile.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+mkdir -p bin
+
+echo "building linux binaries"
+GOOS=linux GOARCH=amd64 go build -o bin/blogo-amd64-linux *.go
+
+echo "building windows binaries"
+GOOS=windows GOARCH=amd64 go build -o bin/blogo-amd64.exe *.go
+
+echo "building macOS binaries"
+GOOS=darwin GOARCH=amd64 go build -o bin/blogo-amd64-darwin *.go

files.go

@@ -1,11 +1,16 @@
 package main
 
 import (
+	"fmt"
 	"io/ioutil"
+	"log"
+	"os"
 	"os/exec"
+	"path/filepath"
 	"strings"
 
 	"github.com/fatih/color"
+	"github.com/fsnotify/fsnotify"
 )
 
 func readFile(path string) string {
@@ -43,3 +48,65 @@ func copyRaw(original string, destination string) {
 	_, err := exec.Command("cp", "-rf", original, destination).Output()
 	check(err)
 }
+
+var watcherInputFiles, watcherPublic *fsnotify.Watcher
+
+func watch(dir string) {
+	var err error
+	var watcher *fsnotify.Watcher
+	if dir == "./blogo-input" {
+		watcherInputFiles, err = fsnotify.NewWatcher()
+		if err != nil {
+			log.Fatal(err)
+		}
+		watcher = watcherInputFiles
+	} else {
+		watcherPublic, err = fsnotify.NewWatcher()
+		if err != nil {
+			log.Fatal(err)
+		}
+		watcher = watcherPublic
+	}
+
+	defer watcher.Close()
+
+	if dir == "./blogo-input" {
+		if err := filepath.Walk(dir, watchInputFilesDir); err != nil {
+			log.Fatal(err)
+		}
+	} else {
+		if err := filepath.Walk(dir, watchPublicDir); err != nil {
+			log.Fatal(err)
+		}
+	}
+
+	for {
+		select {
+		case event := <-watcher.Events:
+			fmt.Printf("file system event: %#v\n", event)
+			if dir == "./blogo-input" {
+				generateHTML()
+			}
+		case err := <-watcher.Errors:
+			log.Fatal("file system watcher error:", err)
+		}
+	}
+}
+
+// watchInputFilesDir gets run as a walk func, searching for directories to add watchers to
+func watchInputFilesDir(path string, fi os.FileInfo, err error) error {
+	if fi.Mode().IsDir() {
+		return watcherInputFiles.Add(path)
+	}
+
+	return nil
+}
+
+// watchPublicDir gets run as a walk func, searching for directories to add watchers to
+func watchPublicDir(path string, fi os.FileInfo, err error) error {
+	if fi.Mode().IsDir() {
+		return watcherPublic.Add(path)
+	}
+
+	return nil
+}

go.mod

@@ -4,5 +4,6 @@ go 1.12
 
 require (
 	github.com/fatih/color v1.9.0
+	github.com/fsnotify/fsnotify v1.5.4
 	github.com/gomarkdown/markdown v0.0.0-20210514010506-3b9f47219fe7
 )

go.sum

@@ -1,5 +1,7 @@
 github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
 github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
+github.com/fsnotify/fsnotify v1.5.4 h1:jRbGcIw6P2Meqdwuo0H1p6JVLbL5DHKAKlYndzMwVZI=
+github.com/fsnotify/fsnotify v1.5.4/go.mod h1:OVB6XrOHzAwXMpEM7uPOzcehqUV2UqJxmVXmkdnm1bU=
 github.com/gomarkdown/markdown v0.0.0-20210514010506-3b9f47219fe7 h1:oKYOfNR7Hp6XpZ4JqolL5u642Js5Z0n7psPVl+S5heo=
 github.com/gomarkdown/markdown v0.0.0-20210514010506-3b9f47219fe7/go.mod h1:aii0r/K0ZnHv7G0KF7xy1v0A7s2Ljrb5byB7MO5p6TU=
 github.com/mattn/go-colorable v0.1.4 h1:snbPLB8fVfU9iwbbo30TPtbLRzwWu6aJS6Xh4eaaviA=
@@ -9,5 +11,6 @@ github.com/mattn/go-isatty v0.0.11 h1:FxPOTFNqGkuDUGi3H/qkUbQO4ZiBa2brKq5r0l8TGe
 github.com/mattn/go-isatty v0.0.11/go.mod h1:PhnuNfih5lzO57/f3n+odYbM4JtupLOxQOAqxQCu2WE=
 golang.org/dl v0.0.0-20190829154251-82a15e2f2ead/go.mod h1:IUMfjQLJQd4UTqG1Z90tenwKoCX93Gn3MAQJMOSBsDQ=
 golang.org/x/sys v0.0.0-20190222072716-a9d3bda3a223/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20220412211240-33da011f77ad h1:ntjMns5wyP/fN65tdBD4g8J5w8n015+iIIs9rtjXkY0=
+golang.org/x/sys v0.0.0-20220412211240-33da011f77ad/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

main.go

@@ -1,7 +1,10 @@
 package main
 
 import (
+	"flag"
 	"fmt"
+	"log"
+	"net/http"
 	"os"
 	"strings"
 
@@ -9,17 +12,39 @@ import (
 	"github.com/gomarkdown/markdown/parser"
 )
 
-const version = "v0_20210810"
+const version = "v0_20220501"
 const directory = "blogo-input"
 const outputDir = "public"
 
 func main() {
+	devMode := flag.Bool("d", false, "dev mode")
+	port := flag.String("p", "8080", "port (only for dev mode)")
+	flag.Parse()
+
 	fmt.Println("Blogo version:", version)
+	_ = os.Mkdir(outputDir, os.ModePerm)
+
+	fmt.Println("devMode:", *devMode)
+	generateHTML()
+	if !*devMode {
+		return
+	}
+
+	go watch("./blogo-input")
+	// TODO public not watched, until a way to force browser refresh
+	// go watch("./public")
+
+	// serve files
+	fs := http.FileServer(http.Dir("public"))
+	fmt.Printf("Blog being served in: \n http://127.0.0.1:%s\n http://localhost:%s\n",
+		*port, *port)
+	log.Fatal(http.ListenAndServe(":"+*port, fs))
+}
+
+func generateHTML() {
 	readConfig(directory + "/blogo.json")
 	fmt.Println(config)
 
-	_ = os.Mkdir(outputDir, os.ModePerm)
-
 	mdExtensions := parser.NoIntraEmphasis | parser.Tables | parser.FencedCode |
 		parser.Autolink | parser.Strikethrough | parser.SpaceHeadings | parser.HeadingIDs |
 		parser.BackslashLineBreak | parser.DefinitionLists