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main.go
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main.go
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package main
import (
"bufio"
"errors"
"fmt"
"html/template"
"io/ioutil"
"log"
"net/http"
"os"
"os/exec"
"path/filepath"
"regexp"
"runtime"
"sort"
"strings"
"time"
"github.com/BurntSushi/toml"
"github.com/fatih/color"
"github.com/mattn/go-isatty"
"github.com/mattn/go-runewidth"
"github.com/pkg/browser"
"github.com/shurcooL/github_flavored_markdown"
"github.com/shurcooL/github_flavored_markdown/gfmstyle"
"github.com/urfave/cli"
)
const (
column = 30
VERSION = "0.0.2"
)
const templateDirContent = `
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Memo Life For You</title>
</head>
<style>
li {list-style-type: none;}
</style>
<body>
<ul>{{range .}}
<li><a href="/{{.Name}}">{{.Name}}</a><dd>{{.Body}}</dd></li>{{end}}
</ul>
</body>
</html>
`
const templateBodyContent = `
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>{{.Name}}</title>
<link href="/assets/gfm/gfm.css" media="all" rel="stylesheet" type="text/css" />
</head>
<body>
{{.Body}}</body>
</html>
`
type config struct {
MemoDir string `toml:"memodir"`
Editor string `toml:"editor"`
Column int `toml:"column"`
SelectCmd string `toml:"selectcmd"`
GrepCmd string `toml:"grepcmd"`
AssetsDir string `toml:"assetsdir"`
}
type entry struct {
Name string
Body template.HTML
}
var commands = []cli.Command{
{
Name: "new",
Aliases: []string{"n"},
Usage: "create memo",
Action: cmdNew,
},
{
Name: "list",
Aliases: []string{"l"},
Usage: "list memo",
Action: cmdList,
Flags: []cli.Flag{
cli.BoolFlag{
Name: "fullpath",
Usage: "show file path",
},
},
},
{
Name: "edit",
Aliases: []string{"e"},
Usage: "edit memo",
Action: cmdEdit,
},
{
Name: "grep",
Aliases: []string{"g"},
Usage: "grep memo",
Action: cmdGrep,
},
{
Name: "config",
Aliases: []string{"c"},
Usage: "configure",
Action: cmdConfig,
},
{
Name: "serve",
Aliases: []string{"s"},
Usage: "start http server",
Action: cmdServe,
Flags: []cli.Flag{
cli.StringFlag{
Name: "addr",
Value: ":8080",
Usage: "server address",
},
},
},
}
func (cfg *config) load() error {
var dir string
if runtime.GOOS == "windows" {
dir = os.Getenv("APPDATA")
if dir == "" {
dir = filepath.Join(os.Getenv("USERPROFILE"), "Application Data", "memo")
}
dir = filepath.Join(dir, "memo")
} else {
dir = filepath.Join(os.Getenv("HOME"), ".config", "memo")
}
if err := os.MkdirAll(dir, 0700); err != nil {
return err
}
file := filepath.Join(dir, "config.toml")
_, err := os.Stat(file)
if err == nil {
_, err := toml.DecodeFile(file, cfg)
return err
}
if !os.IsNotExist(err) {
return err
}
f, err := os.Create(file)
if err != nil {
return err
}
dir = filepath.Join(dir, "_posts")
os.MkdirAll(dir, 0700)
cfg.MemoDir = filepath.ToSlash(dir)
cfg.Editor = os.Getenv("EDITOR")
if cfg.Editor == "" {
cfg.Editor = "vim"
}
cfg.Column = 20
cfg.SelectCmd = "peco"
cfg.GrepCmd = "grep -nH ${PATTERN} ${FILES}"
cfg.AssetsDir = "."
return toml.NewEncoder(f).Encode(cfg)
}
func msg(err error) int {
if err != nil {
fmt.Fprintf(os.Stderr, "%s: %v\n", os.Args[0], err)
return 1
}
return 0
}
func filterMarkdown(files []string) []string {
var newfiles []string
for _, file := range files {
if strings.HasSuffix(file, ".md") {
newfiles = append(newfiles, file)
}
}
sort.Strings(newfiles)
return newfiles
}
func run() int {
var cfg config
err := cfg.load()
if err != nil {
return msg(err)
}
dir := os.Getenv("MEMODIR")
if dir != "" {
cfg.MemoDir = dir
}
app := cli.NewApp()
app.Name = "memo"
app.Usage = "Memo Life For You"
app.Version = VERSION
app.Commands = commands
app.Metadata = map[string]interface{}{"config": &cfg}
return msg(app.Run(os.Args))
}
func firstline(name string) string {
b, err := ioutil.ReadFile(name)
if err != nil {
return ""
}
body := string(b)
if strings.HasPrefix(body, "---\n") {
if pos := strings.Index(body[4:], "---\n"); pos > 0 {
body = body[4+pos+4:]
}
}
body = strings.SplitN(strings.TrimSpace(body), "\n", 2)[0]
return strings.TrimLeft(body, "# ")
}
func cmdList(c *cli.Context) error {
cfg := c.App.Metadata["config"].(*config)
f, err := os.Open(cfg.MemoDir)
if err != nil {
return err
}
defer f.Close()
files, err := f.Readdirnames(-1)
if err != nil {
return err
}
files = filterMarkdown(files)
istty := isatty.IsTerminal(os.Stdout.Fd())
col := cfg.Column
if col == 0 {
col = column
}
pat := c.Args().First()
fullpath := c.Bool("fullpath")
for _, file := range files {
if pat != "" && !strings.Contains(file, pat) {
continue
}
if istty && !fullpath {
title := runewidth.Truncate(firstline(filepath.Join(cfg.MemoDir, file)), 80-4-col, "...")
file = runewidth.FillRight(runewidth.Truncate(file, col, "..."), col)
fmt.Fprintf(color.Output, "%s : %s\n", color.GreenString(file), color.YellowString(title))
} else {
if fullpath {
file = filepath.Join(cfg.MemoDir, file)
}
fmt.Println(file)
}
}
return nil
}
func escape(name string) string {
s := regexp.MustCompile(`[ <>:"/\\|?*%#]`).ReplaceAllString(name, "-")
s = regexp.MustCompile(`--+`).ReplaceAllString(s, "-")
return strings.Trim(strings.Replace(s, "--", "-", -1), "- ")
}
func (cfg *config) runcmd(command, pattern string, files ...string) error {
var args []string
for _, file := range files {
args = append(args, shellquote(file))
}
cmdargs := strings.Join(args, " ")
hasEnv := false
command = os.Expand(command, func(s string) string {
hasEnv = true
switch s {
case "FILES":
return cmdargs
case "PATTERN":
return pattern
case "DIR":
return cfg.MemoDir
}
return ""
})
if !hasEnv {
command += " " + cmdargs
}
var cmd *exec.Cmd
if runtime.GOOS == "windows" {
cmd = exec.Command("cmd", "/c", command)
} else {
cmd = exec.Command("sh", "-c", command)
}
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
cmd.Stdin = os.Stdin
return cmd.Run()
}
func cmdNew(c *cli.Context) error {
cfg := c.App.Metadata["config"].(*config)
var file string
if c.Args().Present() {
file = c.Args().First()
} else {
fmt.Print("Title: ")
scanner := bufio.NewScanner(os.Stdin)
if !scanner.Scan() {
return errors.New("canceld")
}
if scanner.Err() != nil {
return scanner.Err()
}
file = scanner.Text()
}
file = time.Now().Format("2006-01-02-") + escape(file) + ".md"
file = filepath.Join(cfg.MemoDir, file)
return cfg.runcmd(cfg.Editor, "", file)
}
func cmdEdit(c *cli.Context) error {
cfg := c.App.Metadata["config"].(*config)
var files []string
if c.Args().Present() {
files = append(files, filepath.Join(cfg.MemoDir, c.Args().First()))
} else {
f, err := os.Open(cfg.MemoDir)
if err != nil {
return err
}
defer f.Close()
files, err = f.Readdirnames(-1)
if err != nil {
return err
}
files = filterMarkdown(files)
cmd := exec.Command(cfg.SelectCmd)
cmd.Stdin = strings.NewReader(strings.Join(files, "\n"))
b, err := cmd.CombinedOutput()
if err != nil {
return err
}
files = strings.Split(strings.TrimSpace(string(b)), "\n")
for i, file := range files {
files[i] = filepath.Join(cfg.MemoDir, file)
}
}
return cfg.runcmd(cfg.Editor, "", files...)
}
func cmdGrep(c *cli.Context) error {
cfg := c.App.Metadata["config"].(*config)
if !c.Args().Present() {
return nil
}
f, err := os.Open(cfg.MemoDir)
if err != nil {
return err
}
defer f.Close()
files, err := f.Readdirnames(-1)
if err != nil {
return err
}
files = filterMarkdown(files)
var args []string
for _, file := range files {
args = append(args, filepath.Join(cfg.MemoDir, file))
}
return cfg.runcmd(cfg.GrepCmd, c.Args().First(), args...)
}
func cmdConfig(c *cli.Context) error {
cfg := c.App.Metadata["config"].(*config)
dir := os.Getenv("HOME")
if dir == "" && runtime.GOOS == "windows" {
dir = os.Getenv("APPDATA")
if dir == "" {
dir = filepath.Join(os.Getenv("USERPROFILE"), "Application Data", "memo")
}
dir = filepath.Join(dir, "memo")
} else {
dir = filepath.Join(dir, ".config", "memo")
}
file := filepath.Join(dir, "config.toml")
return cfg.runcmd(cfg.Editor, "", file)
}
func cmdServe(c *cli.Context) error {
cfg := c.App.Metadata["config"].(*config)
http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
if req.URL.Path == "/" {
f, err := os.Open(cfg.MemoDir)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
defer f.Close()
files, err := f.Readdirnames(-1)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
files = filterMarkdown(files)
var entries []entry
for _, file := range files {
entries = append(entries, entry{
Name: file,
Body: template.HTML(runewidth.Truncate(firstline(filepath.Join(cfg.MemoDir, file)), 80, "...")),
})
}
w.Header().Set("content-type", "text/html")
t := template.Must(template.New("dir").Parse(templateDirContent))
err = t.Execute(w, entries)
if err != nil {
log.Println(err)
}
} else {
p := filepath.Join(cfg.MemoDir, escape(req.URL.Path))
b, err := ioutil.ReadFile(p)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
body := string(b)
if strings.HasPrefix(body, "---\n") {
if pos := strings.Index(body[4:], "---\n"); pos > 0 {
body = body[4+pos+4:]
}
}
body = string(github_flavored_markdown.Markdown([]byte(body)))
t := template.Must(template.New("body").Parse(templateBodyContent))
t.Execute(w, entry{
Name: req.URL.Path,
Body: template.HTML(body),
})
}
})
http.Handle("/assets/gfm/", http.StripPrefix("/assets/gfm", http.FileServer(gfmstyle.Assets)))
http.Handle("/assets/", http.StripPrefix("/assets", http.FileServer(http.Dir(cfg.AssetsDir))))
addr := c.String("addr")
var url string
if strings.HasPrefix(addr, ":") {
url = "http://localhost" + addr
} else {
url = "http://" + addr
}
browser.OpenURL(url)
return http.ListenAndServe(addr, nil)
}
func main() {
os.Exit(run())
}