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Copy pathgfile_source.go
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82 lines (76 loc) · 2.06 KB
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Copy pathgfile_source.go
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82 lines (76 loc) · 2.06 KB
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// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
package gfile
import (
"os"
"runtime"
"strings"
"github.com/gogf/gf/text/gregex"
)
var (
// goRootForFilter is used for stack filtering purpose.
goRootForFilter = runtime.GOROOT()
)
func init() {
if goRootForFilter != "" {
goRootForFilter = strings.Replace(goRootForFilter, "\\", "/", -1)
}
}
// MainPkgPath returns absolute file path of package main,
// which contains the entrance function main.
//
// It's only available in develop environment.
//
// Note1: Only valid for source development environments,
// IE only valid for systems that generate this executable.
//
// Note2: When the method is called for the first time, if it is in an asynchronous goroutine,
// the method may not get the main package path.
func MainPkgPath() string {
// Only for source development environments.
if goRootForFilter == "" {
return ""
}
path := mainPkgPath.Val()
if path != "" {
return path
}
lastFile := ""
for i := 1; i < 10000; i++ {
if _, file, _, ok := runtime.Caller(i); ok {
if goRootForFilter != "" && len(file) >= len(goRootForFilter) && file[0:len(goRootForFilter)] == goRootForFilter {
continue
}
if gregex.IsMatchString(`/github.com/[^/]+/gf/`, file) &&
!gregex.IsMatchString(`/github.com/[^/]+/gf/\.example/`, file) {
continue
}
if Ext(file) != ".go" {
continue
}
lastFile = file
if gregex.IsMatchString(`package\s+main`, GetContents(file)) {
mainPkgPath.Set(Dir(file))
return Dir(file)
}
} else {
break
}
}
if lastFile != "" {
for path = Dir(lastFile); len(path) > 1 && Exists(path) && path[len(path)-1] != os.PathSeparator; {
files, _ := ScanDir(path, "*.go")
for _, v := range files {
if gregex.IsMatchString(`package\s+main`, GetContents(v)) {
mainPkgPath.Set(path)
return path
}
}
path = Dir(path)
}
}
return ""
}