Clean up the scripts a bit (...)

- Move the Go files into script/ instead of random places
- Rewrite check-contrib.sh into check-authors.go and check-copyright.go
- Clean up build.sh a little bit

script/check-authors.go

@@ -0,0 +1,132 @@
+// Copyright (C) 2015 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build ignore
+
+// Checks for authors that are not mentioned in AUTHORS
+package main
+
+import (
+	"bytes"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/exec"
+	"regexp"
+	"strings"
+)
+
+// list of commits that we don't include in our checks; because they are
+// legacy things that don't check code, are committed with incorrect address,
+// or for other reasons.
+var excludeCommits = stringSetFromStrings([]string{
+	"63bd0136fb40a91efaa279cb4b4159d82e8e6904",
+	"4e2feb6fbc791bb8a2daf0ab8efb10775d66343e",
+	"f2459ef3319b2f060dbcdacd0c35a1788a94b8bd",
+	"b61f418bf2d1f7d5a9d7088a20a2a448e5e66801",
+	"a9339d0627fff439879d157c75077f02c9fac61b",
+	"254c63763a3ad42fd82259f1767db526cff94a14",
+	"4b76ec40c07078beaa2c5e250ed7d9bd6276a718",
+	"32a76901a91ff0f663db6f0830e0aedec946e4d0",
+	"3626003f680bad3e63677982576d3a05421e88e9",
+})
+
+func init() {
+	log.SetOutput(os.Stdout)
+	log.SetFlags(0)
+}
+
+func main() {
+	actual := actualAuthorEmails()
+	listed := listedAuthorEmails()
+	missing := actual.except(listed)
+	if len(missing) > 0 {
+		log.Println("Missing authors:")
+		for author := range missing {
+			log.Println(" ", author)
+		}
+		os.Exit(1)
+	}
+}
+
+// actualAuthorEmails returns the set of author emails found in the actual git
+// commit log, except those in excluded commits.
+func actualAuthorEmails() stringSet {
+	cmd := exec.Command("git", "log", "--format=%H %ae")
+	bs, err := cmd.Output()
+	if err != nil {
+		log.Fatal("authorEmails:", err)
+	}
+
+	authors := newStringSet()
+	for _, line := range bytes.Split(bs, []byte{'\n'}) {
+		fields := strings.Fields(string(line))
+		if len(fields) != 2 {
+			continue
+		}
+
+		hash, author := fields[0], fields[1]
+		if excludeCommits.has(hash) {
+			continue
+		}
+
+		authors.add(author)
+	}
+
+	return authors
+}
+
+// listedAuthorEmails returns the set of author emails mentioned in AUTHORS
+func listedAuthorEmails() stringSet {
+	bs, err := ioutil.ReadFile("AUTHORS")
+	if err != nil {
+		log.Fatal("listedAuthorEmails:", err)
+	}
+
+	emailRe := regexp.MustCompile(`<([^>]+)>`)
+	matches := emailRe.FindAllStringSubmatch(string(bs), -1)
+
+	authors := newStringSet()
+	for _, match := range matches {
+		authors.add(match[1])
+	}
+	return authors
+}
+
+// A simple string set type
+
+type stringSet map[string]struct{}
+
+func newStringSet() stringSet {
+	return make(stringSet)
+}
+
+func stringSetFromStrings(ss []string) stringSet {
+	s := newStringSet()
+	for _, e := range ss {
+		s.add(e)
+	}
+	return s
+}
+
+func (s stringSet) add(e string) {
+	s[e] = struct{}{}
+}
+
+func (s stringSet) has(e string) bool {
+	_, ok := s[e]
+	return ok
+}
+
+func (s stringSet) except(other stringSet) stringSet {
+	diff := newStringSet()
+	for e := range s {
+		if !other.has(e) {
+			diff.add(e)
+		}
+	}
+	return diff
+}