vbatts

vbatts@valse ~ (master *) $ go get github.com/vbatts/docker-utils/cmd/docker-save-dockerfile
vbatts@valse ~ (master *) $ docker save busybox | docker-save-dockerfile 
INFO[0000] using stdin ...                              
INFO[0000] Wrote {"busybox" "latest" "4986bf8c15363d1c5d15512d5266f8777bfba4974ac56e3270e7760f6f0a8125"} to "/tmp/docker-save-dockerfile.755321479/Dockerfile.4986bf8c15363d1c5d15512d5266f8777bfba4974ac56e3270e7760f6f0a8125.441581114"
vbatts@valse ~ (master *) $ docker save -o mutt.tar vbatts/mutt
vbatts@valse ~ (master *) $ docker-save-dockerfile ./mutt.tar 
INFO[0000] using "./mutt.tar" ...                       
INFO[0000] Wrote {"vbatts/mutt" "latest" "7eefac143e1c0f8710462b4689ac6330fe2255fd875bffc745c4e5312731f194"} to "/tmp/docker-save-dockerfile.182211867/Dockerfile.7eefac143e1c0f8710462b4689ac6330fe2255fd875bffc745c4e5312731f194.724815294" 

vbatts

vbatts@valse ~ (master *) $ docker pull --all-tags=true fedora
Pulling repository fedora
717a8c89fa48: Download complete 
93be8052dfb8: Download complete 
d7f0e75cf11f: Download complete 
48ecf305d2cf: Download complete 
eb8e83ebb17d: Download complete 
Status: Image is up to date for fedora
vbatts@valse ~ (master *) $ for i in $(docker images -q fedora | sort -u ); do echo $i; docker run -it $i grep ^root /etc/shadow ; echo ; done
717a8c89fa48

vbatts

#!/bin/sh

set -e

while getopts Dd:s:f:H: c; do
	case $c in 
		H) # docker socket to use
			export DOCKER_HOST="$OPTARG"
			;;
		d) # docker binary to use

vbatts

--- /tmp/orig   2015-06-10 10:00:10.403089775 -0400
+++ /opt/google/chrome/google-chrome    2015-06-10 10:00:14.350098293 -0400
@@ -78,7 +78,7 @@ exec 2> >(exec cat >&2)
 if [[ -n "$CHROME_USER_DATA_DIR" ]]; then
   # Note: exec -a below is a bashism.
   exec -a "$0" "$HERE/chrome"  \
-    --user-data-dir="$CHROME_USER_DATA_DIR" "$@"
+    --user-data-dir="$CHROME_USER_DATA_DIR" --force-device-scale-factor=1 "$@"
 else
-  exec -a "$0" "$HERE/chrome"  "$@"

vbatts

Testing vbatts/tar-split

Output

vbatts@valse ~/tmp/010494540a4d46e2f516 (master) $ go build app.go
vbatts@valse ~/tmp/010494540a4d46e2f516 (master) $ ./app
Starting Sum on "/tmp/tar-split-test.160191501": 2b1c1c203e6bb0ab10c14db7361ede2402ef27468f901f979fb7e8ff8cf3d8c5
Ending Sum on "/tmp/tar-split-test.160191501": 2b1c1c203e6bb0ab10c14db7361ede2402ef27468f901f979fb7e8ff8cf3d8c5

vbatts

package main

import (
  "compress/gzip"
  "io"
  "os"
)

// usage `cat foo.gz | ./gogunzip > foo`
func main() {

vbatts

package main

/*
#include <inttypes.h>

struct dm_deps {
  uint32_t count;
  uint32_t filler;
  uint64_t device[0];
};

vbatts

package main

import (
	"archive/tar"
	"flag"
	"fmt"
	"io"
	"os"
)

vbatts

/home/vbatts/opt/bin/godoc
PACKAGE DOCUMENTATION

package oci
    import "."

    Package oci is a generated protocol buffer package.

    package oci.config.bundle;

vbatts

Curiosity on the differences from moby/moby#16531 (comment)

$ go test
PASS
ok      _/home/vbatts/tmp/string        0.003s
$ go test -run=NONE -bench=. -test.benchmem=true 
PASS
BenchmarkString-4 100000 18982 ns/op 0 B/op 0 allocs/op