From 40e09a1f6cbacf080324f0183437d6f7d91bdd5f Mon Sep 17 00:00:00 2001
From: Salman Aljammaz <s@0x65.net>
Date: Wed, 16 Oct 2013 18:10:07 +0100
Subject: [PATCH] script to generate contributors page from git shortlog.

http://camlistore.org/issue/15

Change-Id: I670e19424772530b190326ba125fdf1122ff29af
---
 website/contriburls.json                 |   9 ++
 website/scripts/gencontrib/gencontrib.go | 174 +++++++++++++++++++++++
 2 files changed, 183 insertions(+)
 create mode 100644 website/contriburls.json
 create mode 100644 website/scripts/gencontrib/gencontrib.go

diff --git a/website/contriburls.json b/website/contriburls.json
new file mode 100644
index 000000000..d91cb494c
--- /dev/null
+++ b/website/contriburls.json
@@ -0,0 +1,9 @@
+{
+  "brad@danga.com": "http://bradfitz.com/",
+  "bslatkin@gmail.com": "http://www.onebigfluke.com/",
+  "adg@golang.org": "http://nf.id.au/",
+  "dan@erat.org": "http://www.erat.org/",
+  "martine@danga.com": "http://neugierig.org/",
+  "agl@golang.org": "http://www.imperialviolet.org/",
+  "s@0x65.net": "http://0x65.net/"
+}
diff --git a/website/scripts/gencontrib/gencontrib.go b/website/scripts/gencontrib/gencontrib.go
new file mode 100644
index 000000000..1541e3687
--- /dev/null
+++ b/website/scripts/gencontrib/gencontrib.go
@@ -0,0 +1,174 @@
+// The gencontrib binary generates an HTML list of git repository contributers.
+package main
+
+import (
+	"bufio"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"html/template"
+	"io"
+	"log"
+	"os"
+	"os/exec"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+var contribStr = `<h1>Contributors</h1>
+
+<p>Camlistore contributors include:</p>
+
+<ul>
+{{range .}}<li>{{if .URL}}<a href="{{.URL}}">{{index .Names 0}}</a>{{else}}{{index .Names 0}}{{end}}</li>
+{{end}}
+</ul>
+
+<p>Want to help?  See <a href="/docs/contributing">contributing</a>.</p>
+`
+
+var urlsFile = flag.String("urls", "", "email → url map file")
+
+func addURLs(idx map[string]*author) {
+	if *urlsFile == "" {
+		return
+	}
+
+	f, err := os.Open(*urlsFile)
+	if err != nil {
+		log.Fatal("couldn't open urls file:", *urlsFile)
+	}
+
+	dec := json.NewDecoder(f)
+	var mapping map[string]interface{}
+	err = dec.Decode(&mapping)
+	if err != nil {
+		log.Fatal("couldn't parse urls file:", err)
+	}
+
+	for email, url := range mapping {
+		a := idx[email]
+		if a != nil {
+			a.URL = url.(string)
+		} else {
+			log.Printf("email %v is not a commiter", email)
+		}
+	}
+}
+
+type author struct {
+	Names   []string
+	Emails  []string
+	Commits int
+	URL     string
+}
+
+func (a *author) add(src *author) {
+	if src == nil {
+		return
+	}
+	a.Emails = append(a.Emails, src.Emails...)
+	a.Names = append(a.Names, src.Names...)
+	a.Commits += src.Commits
+}
+
+type Authors []*author
+
+func (s Authors) Len() int           { return len(s) }
+func (s Authors) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
+func (s Authors) Less(i, j int) bool { return s[i].Commits > s[j].Commits }
+
+func parseLine(l string) (name, email string, commits int, err error) {
+	t := strings.Split(strings.TrimSpace(l), "	")
+	if len(t) < 2 {
+		err = fmt.Errorf("line too short")
+		return
+	}
+	i := strings.LastIndex(t[1], " ")
+	email = strings.Trim(t[1][i+1:], "<>")
+	name = t[1][:i]
+	commits, err = strconv.Atoi(t[0])
+	return
+}
+
+func shortlog() io.Reader {
+	gitlog := exec.Command("git", "log")
+	gitlogOut, err := gitlog.StdoutPipe()
+	if err != nil {
+		log.Fatal(err)
+	}
+	gitlog.Start()
+	if err != nil {
+		log.Fatal("couldn't run git log:", err)
+	}
+
+	shortlog := exec.Command("git", "shortlog", "-sen")
+	shortlog.Stdin = gitlogOut
+	shortlogOut, err := shortlog.StdoutPipe()
+	if err != nil {
+		log.Fatal(err)
+	}
+	shortlog.Start()
+	if err != nil {
+		log.Fatal("couldn't run git shortlog:", err)
+	}
+
+	return shortlogOut
+}
+
+func main() {
+	flag.Parse()
+	contribHtml, err := template.New("contrib").Parse(contribStr)
+	if err != nil {
+		log.Fatal("couldn't parse template")
+	}
+
+	byName := make(map[string]*author)
+	byEmail := make(map[string]*author)
+	authorMap := make(map[*author]bool)
+
+	sl := shortlog()
+
+	scn := bufio.NewScanner(sl)
+	for scn.Scan() {
+		name, email, commits, err := parseLine(scn.Text())
+		if err != nil {
+			log.Fatalf("couldn't parse line \"%v\": %v", scn.Text(), err)
+		}
+
+		a := &author{
+			Emails:  []string{email},
+			Names:   []string{name},
+			Commits: commits,
+		}
+
+		a.add(byName[name])
+		a.add(byEmail[email])
+		for _, n := range a.Names {
+			delete(authorMap, byName[n])
+			byName[n] = a
+		}
+		for _, e := range a.Emails {
+			delete(authorMap, byEmail[e])
+			byEmail[e] = a
+		}
+		authorMap[a] = true
+	}
+	if scn.Err() != nil {
+		log.Fatal(err)
+	}
+
+	addURLs(byEmail)
+
+	authors := Authors{}
+	for a, _ := range authorMap {
+		authors = append(authors, a)
+	}
+
+	sort.Sort(authors)
+
+	if err := contribHtml.Execute(os.Stdout, authors); err != nil {
+		log.Fatalf("executing template: %v", err)
+	}
+}