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compress.go
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compress.go
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package compress
import (
"bytes"
"fmt"
"os"
"path/filepath"
"strings"
"time"
)
func compressJsFiles(s *Settings, force, skip, verbose bool) {
compressFiles(&s.Js.(*compressJs).compress, force, skip, verbose, JsFilters)
}
func compressCssFiles(s *Settings, force, skip, verbose bool) {
compressFiles(&s.Css.(*compressCss).compress, force, skip, verbose, CssFilters)
}
func logError(err string, args ...interface{}) {
err = fmt.Sprintf(err, args...)
fmt.Fprintln(os.Stderr, err)
}
func logInfo(info string, args ...interface{}) {
info = fmt.Sprintf(info, args...)
fmt.Fprintln(os.Stdout, info)
}
func compressFiles(c *compress, force, skip, verbose bool, filters []Filter) {
os.MkdirAll(TmpPath, 0755)
for name, group := range c.Groups {
hasError := false
hasModified := false
sources := make([]string, 0, len(group.SourceFiles))
if verbose {
logInfo("Group '%s'", name)
logInfo("--------------------------")
}
skips := make(map[string]bool, len(group.SkipFiles))
for _, file := range group.SkipFiles {
skips[file] = true
}
for _, file := range group.SourceFiles {
modified := false
var cacheTime *time.Time
cacheFile := filepath.Join(TmpPath, c.SrcPath, file)
if info, err := os.Stat(cacheFile); err == nil {
// get cached file modtime
t := info.ModTime()
cacheTime = &t
}
sourceFile := filepath.Join(c.SrcPath, file)
if info, err := os.Stat(sourceFile); err == nil {
if cacheTime != nil {
if info.ModTime().Unix() > cacheTime.Unix() {
// file modified
modified = true
}
} else {
modified = true
}
} else {
logError("source file %s load error: %s", sourceFile, err.Error())
hasError = true
continue
}
if skip || modified {
buf := bytes.NewBufferString("")
// load content from file
if f, err := os.Open(sourceFile); err == nil {
buf.ReadFrom(f)
f.Close()
} else {
logError("source file %s load error: %s", sourceFile, err.Error())
hasError = true
continue
}
source := buf.String()
if verbose {
fmt.Fprintf(os.Stdout, "compress file %s ... ", sourceFile)
}
if skips[file] {
if verbose {
fmt.Fprintf(os.Stdout, "skiped ")
}
} else {
for _, filter := range filters {
// compress content
source = filter(source)
}
}
sources = append(sources, source)
var writeErr error
dir, _ := filepath.Split(cacheFile)
if writeErr = os.MkdirAll(dir, 0755); writeErr == nil {
if f, err := os.OpenFile(cacheFile, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644); err == nil {
if _, err := f.WriteString(source); err == nil {
hasModified = true
if verbose {
logInfo("saved")
}
} else {
writeErr = err
}
f.Close()
} else {
writeErr = err
}
}
if writeErr != nil {
logError("write error: %s", writeErr.Error())
hasError = true
}
} else {
buf := bytes.NewBufferString("")
// load content from file
if f, err := os.Open(cacheFile); err == nil {
buf.ReadFrom(f)
} else {
logError("cache file %s load error: %s", cacheFile, err.Error())
hasError = true
continue
}
if verbose {
logInfo("use cache file %s", cacheFile)
}
sources = append(sources, buf.String())
}
}
if !hasError {
if hasModified || force {
distFile := filepath.Join(c.DistPath, group.DistFile)
var writeErr error
dir, _ := filepath.Split(distFile)
if writeErr = os.MkdirAll(dir, 0755); writeErr == nil {
if f, err := os.OpenFile(distFile, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644); err == nil {
if _, err := f.WriteString(strings.Join(sources, "\n\n")); err == nil {
if verbose {
logInfo("compressed file %s ... saved", distFile)
}
} else {
writeErr = err
}
f.Close()
} else {
writeErr = err
}
}
if writeErr != nil {
logError("compressed file %s write error: %s", distFile, writeErr.Error())
hasError = true
}
} else {
if verbose {
logInfo("not modified")
}
}
}
if verbose {
logInfo("")
}
}
}