From 4e9a94f689148eaab9d14a6d9bd89bb0a08ea2c3 Mon Sep 17 00:00:00 2001
From: ston1th <ston1th@giftfish.de>
Date: Mon, 5 Sep 2016 22:23:43 +0200
Subject: [PATCH] initial commit

---
 .gitignore |   1 +
 LICENSE    |  24 ++++++++++
 Makefile   |  26 +++++++++++
 README.md  |   5 ++
 main.go    | 134 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 190 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 LICENSE
 create mode 100644 Makefile
 create mode 100644 README.md
 create mode 100644 main.go

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b03cca6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+golic
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..9e52d9b
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,24 @@
+Copyright (C) 2016 Marius Schellenberger
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * The names of the authors and/or contributors may not be used to
+      endorse or promote products derived from this software without
+      specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL ston1th BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5277224
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,26 @@
+CC=go
+BUILD=build -v
+GCFLAGS=--gcflags '-e'
+LDFLAGS=--ldflags '-s -w'
+PROGRAM=golic
+
+all: $(PROGRAM)
+
+$(PROGRAM): codeqa
+	CGO_ENABLED=0 $(CC) $(BUILD) $(GCFLAGS) $(LDFLAGS)
+
+clean:
+	$(CC) clean -x
+
+codeqa: gofmt golint misspell
+
+gofmt:
+	gofmt -w .
+
+golint:
+	$(GOPATH)/bin/golint ./...
+
+misspell:
+	$(GOPATH)/bin/misspell **/*
+
+.PHONY: clean codeqa gofmt golint misspell
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3f62ddd
--- /dev/null
+++ b/README.md
@@ -0,0 +1,5 @@
+# golic
+
+golic is a simple program to generate a third-party licenses file.
+
+golic uses Godep and the `vendor/` directory as its source of LICENSE files.
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..a8ab2fe
--- /dev/null
+++ b/main.go
@@ -0,0 +1,134 @@
+package main
+
+import (
+	"encoding/json"
+	"errors"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strings"
+	"text/template"
+)
+
+type deps struct {
+	ImportPath string
+}
+
+type godep struct {
+	Deps []deps
+}
+
+type license struct {
+	Path string
+	URL  string
+	Text string
+}
+
+const (
+	markdown = `# Third Party Licenses
+{{range $item := .}}
+## [{{$item.Path}}]({{$item.URL}})
+
+{{$item.Text}}
+{{end}}`
+	text = `Third Party Licenses
+{{range $item := .}}
+{{$item.Path}}
+{{$item.URL}}
+
+{{$item.Text}}
+{{end}}`
+)
+
+var (
+	md       bool
+	file     string
+	lics     []license
+	errFound = errors.New("file found")
+	licre    = regexp.MustCompile("([Ll][Ii][Cc][Ee][Nn][Ss][Ee].*)")
+	pathre   = regexp.MustCompile("vendor/(.*/(.*/.*))/")
+)
+
+func init() {
+	flag.BoolVar(&md, "md", false, "enable markdown output")
+	flag.StringVar(&file, "f", "third_party_licenses.txt", "output file")
+}
+
+func trim(s string) string {
+	if strings.Count(s, "/") <= 2 {
+		return s
+	}
+	return trim(s[:strings.LastIndex(s, "/")])
+}
+
+func main() {
+	flag.Parse()
+	var (
+		tmp *template.Template
+		gd  godep
+	)
+	if md {
+		tmp = template.Must(template.New("").Parse(markdown))
+	} else {
+		tmp = template.Must(template.New("").Parse(text))
+	}
+	godeps, err := ioutil.ReadFile("./Godeps/Godeps.json")
+	if err != nil {
+		exit(err)
+	}
+	err = json.Unmarshal(godeps, &gd)
+	if err != nil {
+		exit(err)
+	}
+	paths := make(map[string]struct{})
+	for _, d := range gd.Deps {
+		path := trim(d.ImportPath)
+		if _, ok := paths[path]; ok {
+			continue
+		}
+		err := filepath.Walk(filepath.Join("vendor", path), walker)
+		if err != nil && err != errFound {
+			fmt.Fprintln(os.Stderr, err)
+		}
+		paths[path] = struct{}{}
+	}
+	output, err := os.Create(file)
+	if err != nil {
+		exit(err)
+	}
+	if err := tmp.Execute(output, lics); err != nil {
+		output.Close()
+		exit(err)
+	}
+}
+
+func walker(path string, info os.FileInfo, err error) error {
+	if info == nil {
+		return nil
+	}
+	if info.IsDir() {
+		return nil
+	}
+	if !licre.MatchString(info.Name()) {
+		return nil
+	}
+	text, err := ioutil.ReadFile(path)
+	if err != nil {
+		return err
+	}
+	match := pathre.FindAllStringSubmatch(path, -1)
+	lics = append(lics, license{
+		Path: match[0][2],
+		URL:  match[0][1],
+		Text: string(text),
+	})
+	return errFound
+}
+
+func exit(err error) {
+	fmt.Fprintln(os.Stderr, err)
+	os.Exit(1)
+}