1 files changed, 160 insertions, 0 deletions
diff --git a/vendor/github.com/mattermost/rsc/arq/hist/hist.go b/vendor/github.com/mattermost/rsc/arq/hist/hist.go
new file mode 100644
index 000000000..02fb5fbf0
--- /dev/null
+++ b/vendor/github.com/mattermost/rsc/arq/hist/hist.go
@@ -0,0 +1,160 @@
+// Copyright 2012 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Hist shows the history of a given file, using Arq backups.
+
+    usage: hist [-d] [-h host] [-m mtpt] [-s yyyy/mmdd] file ...
+
+The -d flag causes it to show diffs between successive versions.
+
+By default, hist assumes backups are mounted at mtpt/host, where
+mtpt defaults to /mnt/arq and host is the first element of the local host name.
+Hist starts the file list with the present copy of the file.
+
+The -h and -s flags override these assumptions.
+
+*/
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"strings"
+)
+
+var usageString = `usage: hist [-d] [-h host] [-m mtpt] [-s yyyy/mmdd] file ...
+
+Hist lists the known versions of the given file.
+The -d flag causes it to show diffs between successive versions.
+
+By default, hist assumes backups are mounted at mtpt/host, where
+mtpt defaults to /mnt/arq and host is the first element of the local host name.
+Hist starts the file list with the present copy of the file.
+
+The -h and -s flags override these assumptions.
+`
+
+var (
+	diff = flag.Bool("d", false, "diff")
+	host = flag.String("h", defaultHost(), "host name")
+	mtpt = flag.String("m", "/mnt/arq", "mount point")
+	vers = flag.String("s", "", "version")
+)
+
+func defaultHost() string {
+	name, _ := os.Hostname()
+	if name == "" {
+		name = "gnot"
+	}
+	if i := strings.Index(name, "."); i >= 0 {
+		name = name[:i]
+	}
+	return name
+}
+
+func main() {
+	flag.Usage = func() {
+		fmt.Fprint(os.Stderr, usageString)
+		os.Exit(2)
+	}
+	
+	flag.Parse()
+	args := flag.Args()
+	if len(args) == 0 {
+		flag.Usage()
+	}
+	
+	dates := loadDates()
+	for _, file := range args {
+		list(dates, file)
+	}
+}
+
+var (
+	yyyy = regexp.MustCompile(`^\d{4}$`)
+	mmdd = regexp.MustCompile(`^\d{4}(\.\d+)?$`)
+)
+
+func loadDates() []string {
+	var all []string
+	ydir, err := ioutil.ReadDir(filepath.Join(*mtpt, *host))
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+		os.Exit(3)
+	}
+	for _, y := range ydir {
+		if !y.IsDir() || !yyyy.MatchString(y.Name()) {
+			continue
+		}
+		ddir, err := ioutil.ReadDir(filepath.Join(*mtpt, *host, y.Name()))
+		if err != nil {
+			continue
+		}
+		for _, d := range ddir {
+			if !d.IsDir() || !mmdd.MatchString(d.Name()) {
+				continue
+			}
+			date := y.Name() + "/" + d.Name()
+			if *vers > date {
+				continue
+			}
+			all = append(all, filepath.Join(*mtpt, *host, date))
+		}
+	}
+	return all
+}		
+
+const timeFormat = "Jan 02 15:04:05 MST 2006"
+
+func list(dates []string, file string) {
+	var (
+		last os.FileInfo
+		lastPath string
+	)
+
+	fi, err := os.Stat(file)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "hist: warning: %s: %v\n", file, err)
+	} else {
+		fmt.Printf("%s %s %d\n", fi.ModTime().Format(timeFormat), file, fi.Size())
+		last = fi
+		lastPath = file
+	}
+	
+	file, err = filepath.Abs(file)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "hist: abs: %v\n", err)
+		return
+	}
+
+	for i := len(dates)-1; i >= 0; i-- {
+		p := filepath.Join(dates[i], file)
+		fi, err := os.Stat(p)
+		if err != nil {
+			continue
+		}
+		if last != nil && fi.ModTime() == last.ModTime() && fi.Size() == last.Size() {
+			continue
+		}
+		if *diff {
+			cmd := exec.Command("diff", lastPath, p)
+			cmd.Stdout = os.Stdout
+			cmd.Stderr = os.Stderr
+			if err := cmd.Start(); err != nil {
+				fmt.Fprintf(os.Stderr, "%s\n", err)
+			}
+			cmd.Wait()
+		}
+		fmt.Printf("%s %s %d\n", fi.ModTime().Format(timeFormat), p, fi.Size())
+		last = fi
+		lastPath = p
+	}
+}
+