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main.go
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main.go
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package main
import (
"bufio"
"bytes"
"errors"
"fmt"
"html/template"
"io"
"io/ioutil"
"log"
"net/http"
"os"
"os/exec"
"path/filepath"
"regexp"
"runtime"
"sort"
"strings"
tt "text/template"
"time"
"github.com/BurntSushi/toml"
"github.com/fatih/color"
"github.com/mattn/go-colorable"
"github.com/mattn/go-isatty"
"github.com/mattn/go-runewidth"
"github.com/mattn/go-tty"
"github.com/pkg/browser"
"github.com/shurcooL/github_flavored_markdown"
"github.com/shurcooL/github_flavored_markdown/gfmstyle"
"github.com/urfave/cli/v2"
)
const (
name = "memo"
version = "0.0.17"
revision = "HEAD"
)
const (
column = 30
width = 80
)
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>
<main class="markdown-body">
{{.Body}}
</main>
</body>
</html>
`
const templateMemoContent = `# {{.Title}}
`
type config struct {
MemoDir string `toml:"memodir"`
Editor string `toml:"editor"`
Column int `toml:"column"`
Width int `toml:"width"`
SelectCmd string `toml:"selectcmd"`
GrepCmd string `toml:"grepcmd"`
MemoTemplate string `toml:"memotemplate"`
AssetsDir string `toml:"assetsdir"`
PluginsDir string `toml:"pluginsdir"`
TemplateDirFile string `toml:"templatedirfile"`
TemplateBodyFile string `toml:"templatebodyfile"`
}
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",
},
&cli.StringFlag{
Name: "format",
Usage: "print the result using a Go template `string`",
},
},
},
{
Name: "edit",
Aliases: []string{"e"},
Usage: "edit memo",
Action: cmdEdit,
},
{
Name: "cat",
Aliases: []string{"v"},
Usage: "view memo",
Action: cmdCat,
},
{
Name: "delete",
Aliases: []string{"d"},
Usage: "delete memo",
Action: cmdDelete,
},
{
Name: "grep",
Aliases: []string{"g"},
Usage: "grep memo",
Action: cmdGrep,
},
{
Name: "config",
Aliases: []string{"c"},
Usage: "configure",
Action: cmdConfig,
Flags: []cli.Flag{
&cli.BoolFlag{
Name: "cat",
Usage: "cat the file",
},
},
},
{
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 fmt.Errorf("cannot create directory: %v", err)
}
file := filepath.Join(dir, "config.toml")
confDir := dir
_, err := os.Stat(file)
if err == nil {
_, err := toml.DecodeFile(file, cfg)
if err != nil {
return err
}
cfg.MemoDir = expandPath(cfg.MemoDir)
cfg.AssetsDir = expandPath(cfg.AssetsDir)
if cfg.PluginsDir == "" {
cfg.PluginsDir = filepath.Join(confDir, "plugins")
}
cfg.PluginsDir = expandPath(cfg.PluginsDir)
if cfg.MemoTemplate == "" {
cfg.MemoTemplate = filepath.Join(confDir, "template.txt")
}
cfg.MemoTemplate = expandPath(cfg.MemoTemplate)
dir := os.Getenv("MEMODIR")
if dir != "" {
cfg.MemoDir = dir
}
return nil
}
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 = "."
dir = filepath.Join(confDir, "plugins")
os.MkdirAll(dir, 0700)
cfg.PluginsDir = filepath.ToSlash(dir)
dir = os.Getenv("MEMODIR")
if dir != "" {
cfg.MemoDir = dir
}
return toml.NewEncoder(f).Encode(cfg)
}
func expandPath(s string) string {
if len(s) >= 2 && s[0] == '~' && os.IsPathSeparator(s[1]) {
if runtime.GOOS == "windows" {
s = filepath.Join(os.Getenv("USERPROFILE"), s[2:])
} else {
s = filepath.Join(os.Getenv("HOME"), s[2:])
}
}
return os.Expand(s, os.Getenv)
}
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.Sort(sort.Reverse(sort.StringSlice(newfiles)))
return newfiles
}
func ask(prompt string) (bool, error) {
fmt.Print(prompt + ": ")
t, err := tty.Open()
if err != nil {
return false, err
}
defer t.Close()
var r rune
for r == 0 {
r, err = t.ReadRune()
if err != nil {
return false, err
}
}
fmt.Println()
return r == 'y' || r == 'Y', nil
}
func run() int {
app := cli.NewApp()
app.Name = name
app.Usage = "Memo Life For You"
app.Version = version
app.Commands = commands
app.Action = appRun
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 {
var cfg config
err := cfg.load()
if err != nil {
return err
}
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()
var tmpl *tt.Template
if format := c.String("format"); format != "" {
t, err := tt.New("format").Parse(format)
if err != nil {
return err
}
tmpl = t
}
fullpath := c.Bool("fullpath")
for _, file := range files {
if pat != "" && !strings.Contains(file, pat) {
continue
}
if tmpl != nil {
var b bytes.Buffer
err := tmpl.Execute(&b, map[string]interface{}{
"File": file,
"Title": firstline(filepath.Join(cfg.MemoDir, file)),
"Fullpath": filepath.Join(cfg.MemoDir, file),
})
if err != nil {
return err
}
fmt.Println(b.String())
} else if istty && !fullpath {
wi := cfg.Width
if wi == 0 {
wi = width
}
title := runewidth.Truncate(firstline(filepath.Join(cfg.MemoDir, file)), wi-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) runfilter(command string, r io.Reader, w io.Writer) error {
command = os.Expand(command, func(s string) string {
switch s {
case "DIR":
return cfg.MemoDir
}
return os.Getenv(s)
})
var cmd *exec.Cmd
if runtime.GOOS == "windows" {
cmd = exec.Command("cmd", "/c", command)
} else {
cmd = exec.Command("sh", "-c", command)
}
cmd.Stderr = os.Stderr
cmd.Stdout = w
cmd.Stdin = r
return cmd.Run()
}
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 os.Getenv(s)
})
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.Stderr = os.Stderr
cmd.Stdout = os.Stdout
cmd.Stdin = os.Stdin
return cmd.Run()
}
func fileExists(filename string) bool {
_, err := os.Stat(filename)
return err == nil
}
func copyFromStdin(filename string) error {
f, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY, 0644)
if err != nil {
return err
}
defer f.Close()
_, err = io.Copy(f, os.Stdin)
return err
}
func cmdNew(c *cli.Context) error {
var cfg config
err := cfg.load()
if err != nil {
return err
}
var title string
var file string
now := time.Now()
if c.Args().Present() {
title = c.Args().First()
file = now.Format("2006-01-02-") + escape(title) + ".md"
} else {
fmt.Print("Title: ")
scanner := bufio.NewScanner(os.Stdin)
if !scanner.Scan() {
return errors.New("canceled")
}
if scanner.Err() != nil {
return scanner.Err()
}
title = scanner.Text()
if title == "" {
title = now.Format("2006-01-02")
file = title + ".md"
} else {
file = now.Format("2006-01-02-") + escape(title) + ".md"
}
}
file = filepath.Join(cfg.MemoDir, file)
if fileExists(file) {
if !isatty.IsTerminal(os.Stdin.Fd()) {
return copyFromStdin(file)
}
return cfg.runcmd(cfg.Editor, "", file)
}
tmplString := templateMemoContent
if fileExists(cfg.MemoTemplate) {
b, err := ioutil.ReadFile(cfg.MemoTemplate)
if err != nil {
return err
}
tmplString = filterTmpl(string(b))
}
t := template.Must(template.New("memo").Parse(tmplString))
f, err := os.Create(file)
if err != nil {
return err
}
err = t.Execute(f, struct {
Title, Date, Tags, Categories string
}{
title, now.Format("2006-01-02 15:04"), "", "",
})
f.Close()
if err != nil {
return err
}
if !isatty.IsTerminal(os.Stdin.Fd()) {
return copyFromStdin(file)
}
return cfg.runcmd(cfg.Editor, "", file)
}
var filterReg = regexp.MustCompile(`{{_(.+?)_}}`)
func filterTmpl(tmpl string) string {
return filterReg.ReplaceAllStringFunc(tmpl, func(substr string) string {
m := filterReg.FindStringSubmatch(substr)
return fmt.Sprintf("{{.%s}}", strings.Title(m[1]))
})
}
func (cfg *config) filterFiles() ([]string, error) {
var files []string
f, err := os.Open(cfg.MemoDir)
if err != nil {
return nil, err
}
defer f.Close()
files, err = f.Readdirnames(-1)
if err != nil {
return nil, err
}
files = filterMarkdown(files)
var buf bytes.Buffer
err = cfg.runfilter(cfg.SelectCmd, strings.NewReader(strings.Join(files, "\n")), &buf)
if err != nil {
// TODO:
// Some select tools return non-zero, and some return zero.
// This part can't handle whether the command execute failure or
// the select command exit non-zero.
//return fmt.Errorf("%v: you need to install peco first: https://github.com/peco/peco", err)
return nil, err
}
if buf.Len() == 0 {
return nil, errors.New("No files selected")
}
files = strings.Split(strings.TrimSpace(buf.String()), "\n")
for i, file := range files {
files[i] = filepath.Join(cfg.MemoDir, file)
}
return files, nil
}
func cmdEdit(c *cli.Context) error {
var cfg config
err := cfg.load()
if err != nil {
return err
}
var files []string
if c.Args().Present() {
files = append(files, filepath.Join(cfg.MemoDir, c.Args().First()))
} else {
files, err = cfg.filterFiles()
if err != nil {
return err
}
}
return cfg.runcmd(cfg.Editor, "", files...)
}
func catFile(file string) error {
f, err := os.Open(file)
if err != nil {
return err
}
defer f.Close()
scanner := bufio.NewScanner(f)
for scanner.Scan() {
fmt.Println(scanner.Text())
}
return scanner.Err()
}
func cmdCat(c *cli.Context) error {
var cfg config
err := cfg.load()
if err != nil {
return err
}
var files []string
if c.Args().Present() {
files = append(files, filepath.Join(cfg.MemoDir, c.Args().First()))
} else {
files, err = cfg.filterFiles()
if err != nil {
return err
}
}
for i, file := range files {
if i > 0 {
// Print new page
fmt.Println("\x12")
}
err = catFile(file)
if err != nil {
return err
}
}
return nil
}
func cmdDelete(c *cli.Context) error {
var cfg config
err := cfg.load()
if err != nil {
return err
}
if !c.Args().Present() {
return errors.New("pattern required")
}
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)
pat := c.Args().First()
var args []string
for _, file := range files {
if pat != "" && !strings.Contains(file, pat) {
continue
}
fmt.Println(file)
args = append(args, filepath.Join(cfg.MemoDir, file))
}
if len(args) == 0 {
color.Yellow("%s", "No matched entry")
return nil
}
color.Red("%s", "Will delete those entry. Are you sure?")
answer, err := ask("Are you sure? (y/N)")
if answer == false || err != nil {
return err
}
answer, err = ask("Really? (y/N)")
if answer == false || err != nil {
return err
}
for _, arg := range args {
err = os.Remove(arg)
if err != nil {
return err
}
color.Yellow("Deleted: %v", arg)
}
return nil
}
func cmdGrep(c *cli.Context) error {
var cfg config
err := cfg.load()
if err != nil {
return err
}
if !c.Args().Present() {
return errors.New("pattern required")
}
f, err := os.Open(cfg.MemoDir)
if err != nil {
return err
}
defer f.Close()
var args []string
if strings.Index(cfg.GrepCmd, "${FILES}") != -1 {
files, err := f.Readdirnames(-1)
if err != nil || len(files) == 0 {
return err
}
files = filterMarkdown(files)
for _, file := range files {
args = append(args, filepath.Join(cfg.MemoDir, file))
}
}
if runtime.GOOS == "windows" && len(args) > 0 {
pos := 0
for {
next := pos + 20
if next > len(args) {
next = len(args)
}
err1 := cfg.runcmd(cfg.GrepCmd, c.Args().First(), args[pos:next]...)
if err != nil {
err = err1
}
pos += 20
if pos > len(args) {
break
}
}
return err
}
return cfg.runcmd(cfg.GrepCmd, c.Args().First(), args...)
}
func cmdConfig(c *cli.Context) error {
var cfg config
err := cfg.load()
if err != nil {
return err
}
dir := os.Getenv("HOME")
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(dir, ".config", "memo")
}
file := filepath.Join(dir, "config.toml")
if c.Bool("cat") {
f, err := os.Open(file)
if err != nil {
return err
}
defer f.Close()
_, err = io.Copy(os.Stdout, f)
return err
}
return cfg.runcmd(cfg.Editor, "", file)
}
func cmdServe(c *cli.Context) error {
var cfg config
err := cfg.load()
if err != nil {
return err
}
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")
cfg.TemplateDirFile = expandPath(cfg.TemplateDirFile)
var t *template.Template
if cfg.TemplateDirFile == "" {
t = template.Must(template.New("dir").Parse(templateDirContent))
} else {
t, err = template.ParseFiles(cfg.TemplateDirFile)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
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)))
cfg.TemplateBodyFile = expandPath(cfg.TemplateBodyFile)
var t *template.Template
if cfg.TemplateBodyFile == "" {
t = template.Must(template.New("body").Parse(templateBodyContent))
} else {
t, err = template.ParseFiles(cfg.TemplateBodyFile)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
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 listPlugins(fn func(string)) error {
var cfg config
err := cfg.load()
if err != nil {
return err
}
dir, err := os.Open(cfg.PluginsDir)
if err != nil {
return err
}
defer dir.Close()
names, err := dir.Readdirnames(-1)
if err != nil {
return err
}
sort.Strings(names)
fmt.Println("\nSUB COMMANDS:")
if runtime.GOOS != "windows" {
for _, name := range names {
p := filepath.Join(cfg.PluginsDir, name)
fi, err := os.Stat(p)
if err != nil {
continue
}
if m := fi.Mode(); !m.IsDir() && m&0111 != 0 {
fn(filepath.Join(cfg.PluginsDir, fi.Name()))
}
}
} else {
pathext := strings.Split(strings.ToLower(os.Getenv("PATHEXT")), ";")
for _, name := range names {
for _, p := range pathext {
if strings.ToLower(filepath.Ext(name)) == p {
fn(filepath.Join(cfg.PluginsDir, name))
break
}
}
}
}
return nil
}
func appRun(c *cli.Context) error {
args := c.Args()
if !args.Present() {
cli.ShowAppHelp(c)
listPlugins(func(s string) {
b, err := exec.Command(s, "-usage").CombinedOutput()
if err != nil {
return
}
s = filepath.Base(s)
if runtime.GOOS == "windows" {
s = s[:len(s)-len(filepath.Ext(s))]
}
fmt.Println(" " + s)
lines := strings.Split(string(b), "\n")
for _, line := range lines {
fmt.Println(" " + line)
}
})
return nil
}
var cfg config
err := cfg.load()
if err != nil {
return err
}
xcmdpath := filepath.Join(cfg.PluginsDir, args.First())
_, err = exec.LookPath(xcmdpath)
if err != nil {
return fmt.Errorf("'%s' is not a memo command. see 'memo help'", args.First())
}
defer colorable.EnableColorsStdout(nil)()
// run external command as a memo subcommand.
xargs := args.Tail()
cmd := exec.Command(xcmdpath, xargs...)
cmd.Env = append(os.Environ(), fmt.Sprintf("MEMODIR=%s", cfg.MemoDir))
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
cmd.Stdin = os.Stdin
return cmd.Run()
}
func main() {
os.Exit(run())
}