build: new update-license.go

This version is less clever. All names are listed in a single file,
AUTHORS. All source files have the same header. This is an improvement
over the previous version, which attempted to list copyright holders in
each source file.

1 files changed, 0 insertions, 248 deletions

diff --git a/update-license.go b/update-license.go
deleted file mode 100644
index ea7ab67c5..000000000
--- a/update-license.go
+++ /dev/null
@@ -1,248 +0,0 @@
-// +build none
-
-/*
-This command generates GPL license headers on top of all source files.
-You can run it once per month, before cutting a release or just
-whenever you feel like it.
-
-	go run update-license.go
-
-The copyright in each file is assigned to any authors for which git
-can find commits in the file's history. It will try to follow renames
-throughout history. The author names are mapped and deduplicated using
-the .mailmap file. You can use .mailmap to set the canonical name and
-address for each author. See git-shortlog(1) for an explanation
-of the .mailmap format.
-
-Please review the resulting diff to check whether the correct
-copyright assignments are performed.
-*/
-package main
-
-import (
-	"bufio"
-	"bytes"
-	"fmt"
-	"io/ioutil"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"regexp"
-	"runtime"
-	"sort"
-	"strings"
-	"sync"
-	"text/template"
-)
-
-var (
-	// only files with these extensions will be considered
-	extensions = []string{".go", ".js", ".qml"}
-
-	// paths with any of these prefixes will be skipped
-	skipPrefixes = []string{"Godeps/", "tests/files/", "cmd/mist/assets/ext/", "cmd/mist/assets/muted/"}
-
-	// paths with this prefix are licensed as GPL. all other files are LGPL.
-	gplPrefixes = []string{"cmd/"}
-
-	// this regexp must match the entire license comment at the
-	// beginning of each file.
-	licenseCommentRE = regexp.MustCompile(`(?s)^/\*\s*(Copyright|This file is part of) .*?\*/\n*`)
-
-	// this line is used when git doesn't find any authors for a file
-	defaultCopyright = "Copyright (C) 2014 Jeffrey Wilcke <jeffrey@ethereum.org>"
-)
-
-// this template generates the license comment.
-// its input is an info structure.
-var licenseT = template.Must(template.New("").Parse(`/*
-	{{.Copyrights}}
-
-	This file is part of go-ethereum
-
-	go-ethereum is free software: you can redistribute it and/or modify
-	it under the terms of the GNU {{.License}} as published by
-	the Free Software Foundation, either version 3 of the License, or
-	(at your option) any later version.
-
-	go-ethereum is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU {{.License}} for more details.
-
-	You should have received a copy of the GNU {{.License}}
-	along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-`))
-
-type info struct {
-	file    string
-	mode    os.FileMode
-	authors map[string][]string // map keys are authors, values are years
-	gpl     bool
-}
-
-func (i info) Copyrights() string {
-	var lines []string
-	for name, years := range i.authors {
-		lines = append(lines, "Copyright (C) "+strings.Join(years, ", ")+" "+name)
-	}
-	if len(lines) == 0 {
-		lines = []string{defaultCopyright}
-	}
-	sort.Strings(lines)
-	return strings.Join(lines, "\n\t")
-}
-
-func (i info) License() string {
-	if i.gpl {
-		return "General Public License"
-	} else {
-		return "Lesser General Public License"
-	}
-}
-
-func (i info) ShortLicense() string {
-	if i.gpl {
-		return "GPL"
-	} else {
-		return "LGPL"
-	}
-}
-
-func (i *info) addAuthorYear(name, year string) {
-	for _, y := range i.authors[name] {
-		if y == year {
-			return
-		}
-	}
-	i.authors[name] = append(i.authors[name], year)
-	sort.Strings(i.authors[name])
-}
-
-func main() {
-	files := make(chan string)
-	infos := make(chan *info)
-	wg := new(sync.WaitGroup)
-
-	go getFiles(files)
-	for i := runtime.NumCPU(); i >= 0; i-- {
-		// getting file info is slow and needs to be parallel
-		wg.Add(1)
-		go getInfo(files, infos, wg)
-	}
-	go func() { wg.Wait(); close(infos) }()
-	writeLicenses(infos)
-}
-
-func getFiles(out chan<- string) {
-	cmd := exec.Command("git", "ls-tree", "-r", "--name-only", "HEAD")
-	err := doLines(cmd, func(line string) {
-		for _, p := range skipPrefixes {
-			if strings.HasPrefix(line, p) {
-				return
-			}
-		}
-		ext := filepath.Ext(line)
-		for _, wantExt := range extensions {
-			if ext == wantExt {
-				goto send
-			}
-		}
-		return
-
-	send:
-		out <- line
-	})
-	if err != nil {
-		fmt.Println("error getting files:", err)
-	}
-	close(out)
-}
-
-func getInfo(files <-chan string, out chan<- *info, wg *sync.WaitGroup) {
-	for file := range files {
-		stat, err := os.Lstat(file)
-		if err != nil {
-			fmt.Printf("ERROR %s: %v\n", file, err)
-			continue
-		}
-		if !stat.Mode().IsRegular() {
-			continue
-		}
-		info, err := fileInfo(file)
-		if err != nil {
-			fmt.Printf("ERROR %s: %v\n", file, err)
-			continue
-		}
-		info.mode = stat.Mode()
-		out <- info
-	}
-	wg.Done()
-}
-
-func fileInfo(file string) (*info, error) {
-	info := &info{file: file, authors: make(map[string][]string)}
-	for _, p := range gplPrefixes {
-		if strings.HasPrefix(file, p) {
-			info.gpl = true
-			break
-		}
-	}
-	cmd := exec.Command("git", "log", "--follow", "--find-copies", "--pretty=format:%ai | %aN <%aE>", "--", file)
-	err := doLines(cmd, func(line string) {
-		sep := strings.IndexByte(line, '|')
-		year, name := line[:4], line[sep+2:]
-		info.addAuthorYear(name, year)
-	})
-	return info, err
-}
-
-func writeLicenses(infos <-chan *info) {
-	buf := new(bytes.Buffer)
-	for info := range infos {
-		content, err := ioutil.ReadFile(info.file)
-		if err != nil {
-			fmt.Printf("ERROR: couldn't read %s: %v\n", info.file, err)
-			continue
-		}
-
-		// construct new file content
-		buf.Reset()
-		licenseT.Execute(buf, info)
-		if m := licenseCommentRE.FindIndex(content); m != nil && m[0] == 0 {
-			buf.Write(content[m[1]:])
-		} else {
-			buf.Write(content)
-		}
-
-		if !bytes.Equal(content, buf.Bytes()) {
-			fmt.Println("writing", info.ShortLicense(), info.file)
-			if err := ioutil.WriteFile(info.file, buf.Bytes(), info.mode); err != nil {
-				fmt.Printf("ERROR: couldn't write %s: %v", info.file, err)
-			}
-		}
-	}
-}
-
-func doLines(cmd *exec.Cmd, f func(string)) error {
-	stdout, err := cmd.StdoutPipe()
-	if err != nil {
-		return err
-	}
-	if err := cmd.Start(); err != nil {
-		return err
-	}
-	s := bufio.NewScanner(stdout)
-	for s.Scan() {
-		f(s.Text())
-	}
-	if s.Err() != nil {
-		return s.Err()
-	}
-	if err := cmd.Wait(); err != nil {
-		return fmt.Errorf("%v (for %s)", err, strings.Join(cmd.Args, " "))
-	}
-	return nil
-}