forked from oxequa/realize
/
watcher.go
263 lines (240 loc) · 6.36 KB
/
watcher.go
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package cli
import (
"errors"
"fmt"
"github.com/fsnotify/fsnotify"
"log"
"math/big"
"os"
"os/signal"
"path/filepath"
"strings"
"sync"
"syscall"
"time"
)
// Watching method is the main core. It manages the livereload and the watching
func (p *Project) watching() {
var wr sync.WaitGroup
var watcher *fsnotify.Watcher
sync := func() {
p.parent.Sync <- "sync"
}
watcher, err := fsnotify.NewWatcher()
if err != nil {
log.Println(strings.ToUpper(pname(p.Name, 1)), ":", Red(err.Error()))
}
channel, exit := make(chan bool, 1), make(chan bool, 1)
if err != nil {
log.Println(pname(p.Name, 1), ":", Red(err.Error()))
}
end := func() {
watcher.Close()
wg.Done()
}
defer end()
p.cmd(exit)
err = p.walks(watcher)
if err != nil {
fmt.Println(pname(p.Name, 1), ":", Red(err.Error()))
return
}
go p.routines(channel, &wr)
p.LastChangedOn = time.Now().Truncate(time.Second)
// waiting for an event
for {
select {
case event := <-watcher.Events:
if time.Now().Truncate(time.Second).After(p.LastChangedOn) {
if event.Op&fsnotify.Chmod == fsnotify.Chmod {
continue
}
if _, err := os.Stat(event.Name); err == nil {
var ext string
if index := strings.Index(filepath.Ext(event.Name), "_"); index == -1 {
ext = filepath.Ext(event.Name)
} else {
ext = filepath.Ext(event.Name)
ext = ext[0:index]
}
i := strings.Index(event.Name, filepath.Ext(event.Name))
if event.Name[:i] != "" && inArray(ext, p.Watcher.Exts) {
p.Buffer.StdLog = append(p.Buffer.StdLog, BufferOut{Time: time.Now(), Text: strings.ToUpper(ext[1:]) + " changed " + event.Name[:i] + ext})
go sync()
fmt.Println(pname(p.Name, 4), Magenta(strings.ToUpper(ext[1:])+" changed"), Magenta(event.Name[:i]+ext))
// stop and run again
if p.Run {
close(channel)
channel = make(chan bool)
}
err := p.fmt(event.Name[:i] + ext)
if err != nil {
log.Fatal(Red(err))
} else {
go p.routines(channel, &wr)
p.LastChangedOn = time.Now().Truncate(time.Second)
}
}
}
}
case err := <-watcher.Errors:
log.Println(Red(err.Error()))
case <-exit:
return
}
}
}
// Install calls an implementation of the "go install"
func (p *Project) install(channel chan bool, wr *sync.WaitGroup) {
if p.Bin {
log.Println(pname(p.Name, 1), ":", "Installing..")
start := time.Now()
if std, err := p.GoInstall(); err != nil {
log.Println(pname(p.Name, 1), ":", fmt.Sprint(Red(err)), std)
wr.Done()
} else {
log.Println(pname(p.Name, 5), ":", Green("Installed")+" after", MagentaS(big.NewFloat(float64(time.Since(start).Seconds())).Text('f', 3), " s"))
if p.Run {
runner := make(chan bool, 1)
log.Println(pname(p.Name, 1), ":", "Running..")
start = time.Now()
go p.GoRun(channel, runner, wr)
for {
select {
case <-runner:
log.Println(pname(p.Name, 5), ":", Green("Has been run")+" after", MagentaS(big.NewFloat(float64(time.Since(start).Seconds())).Text('f', 3), " s"))
return
}
}
}
}
}
return
}
// Build calls an implementation of the "go build"
func (p *Project) build() {
if p.Build {
log.Println(pname(p.Name, 1), ":", "Building..")
start := time.Now()
if std, err := p.GoBuild(); err != nil {
log.Println(pname(p.Name, 1), ":", fmt.Sprint(Red(err)), std)
} else {
log.Println(pname(p.Name, 5), ":", Green("Builded")+" after", MagentaS(big.NewFloat(float64(time.Since(start).Seconds())).Text('f', 3), " s"))
}
return
}
return
}
// Fmt calls an implementation of the "gofmt"
func (p *Project) fmt(path string) error {
if p.Fmt {
if _, err := p.GoFmt(path); err != nil {
log.Println(pname(p.Name, 1), Red("There are some GoFmt errors in "), ":", Magenta(path))
}
}
return nil
}
// Cmd calls an wrapper for execute the commands after/before
func (p *Project) cmd(exit chan bool) {
c := make(chan os.Signal, 2)
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
cast := func(commands []string) {
if errs := p.Cmd(commands); errs != nil {
for _, err := range errs {
log.Println(pname(p.Name, 2), Red(err))
}
}
}
if len(p.Watcher.Before) > 0 {
cast(p.Watcher.Before)
}
go func() {
for {
select {
case <-c:
if len(p.Watcher.After) > 0 {
cast(p.Watcher.After)
}
close(exit)
}
}
}()
}
// Test calls an implementation of the "go test"
func (p *Project) test(path string) error {
if p.Test {
if _, err := p.GoTest(path); err != nil {
log.Println(pname(p.Name, 1), Red("Go Test fails in "), ":", Magenta(path))
}
}
return nil
}
// Walks the file tree of a project
func (p *Project) walks(watcher *fsnotify.Watcher) error {
var files, folders int64
wd, _ := os.Getwd()
walk := func(path string, info os.FileInfo, err error) error {
if !p.ignore(path) {
if (info.IsDir() && len(filepath.Ext(path)) == 0 && !strings.HasPrefix(path, ".")) && !strings.Contains(path, "/.") || (inArray(filepath.Ext(path), p.Watcher.Exts)) {
if p.Watcher.Preview {
fmt.Println(pname(p.Name, 1), ":", path)
}
if err = watcher.Add(path); err != nil {
return filepath.SkipDir
}
if inArray(filepath.Ext(path), p.Watcher.Exts) {
files++
go func() {
if err := p.fmt(path); err != nil {
fmt.Println(err)
}
}()
} else {
folders++
go func() {
if err := p.test(path); err != nil {
fmt.Println(err)
}
}()
}
}
}
return nil
}
if p.Path == "." || p.Path == "/" {
p.base = wd
p.Path = WorkingDir()
} else if filepath.IsAbs(p.Path) {
p.base = p.Path
} else {
p.base = filepath.Join(wd, p.Path)
}
for _, dir := range p.Watcher.Paths {
base := filepath.Join(p.base, dir)
if _, err := os.Stat(base); err == nil {
if err := filepath.Walk(base, walk); err != nil {
log.Println(Red(err.Error()))
}
} else {
return errors.New(base + " path doesn't exist")
}
}
fmt.Println(pname(p.Name, 1), Red("Watching"), Magenta(files), "file/s", Magenta(folders), "folder/s")
return nil
}
// Ignore validates a path
func (p *Project) ignore(str string) bool {
for _, v := range p.Watcher.Ignore {
if strings.Contains(str, filepath.Join(p.base, v)) {
return true
}
}
return false
}
// Routines launches the following methods: run, build, fmt, install
func (p *Project) routines(channel chan bool, wr *sync.WaitGroup) {
wr.Add(1)
go p.build()
go p.install(channel, wr)
wr.Wait()
}