README.md

## README.md

      
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              README.md
            
          
    building openblockchain/obc-peer on Ubuntu Trusty 14.04
Intent of this gist is to show building of openblcokchain/obc-peer on 14.04
setup
To set up (download source, install packages and build necessary deps):
. config
./setup

build
To build:
. config
cd $GOPATH/src/github.com/openblockchain/obc-peer
go clean
go build

looping build
To 'clean', then 'build' in a loop with timings:
loop-commands 10


## boot-kernel
#!/bin/sh
#
# This just selects which kernel to boot on an ubuntu
# system and sets it to boot with 'grub-reboot'
#
# based on http://statusq.org/archives/2012/10/24/4584/ and
# http://statusq.org/archives/2012/10/24/4584/
kernel_in="$1"
kernel=""
fail() { [ $# -eq 0 ] || msg "$@"; exit 1; }
msg() { echo "$@" 1>&2; }
[ "$(id -u)" = "0" ] || fail "not root. sorry"

if [ -f "$kernel_in" ]; then
   kernel=${kernel_in}
elif [ -f "/boot/$kernel_in" ]; then
   kernel="/boot/${kernel_in}"
else
   kmatch="$kernel_in"
   if [ "${kmatch#*/}" = "$kmatch" ]; then
      kmatch="/boot/vmlinu?-${kmatch#vmlinu?-}*"
   else
      kmatch="/boot/$kmatch"
   fi
   msg "kmatch=$kmatch"
   for f in $kmatch; do
      if [ -f "$f" ]; then
         if [ -n "$kernel" ]; then
            fail "multiple kernels match $kmatch"
         fi
         kernel="$f"
      fi
   done
fi

gdef=$(sh -c '. /etc/default/grub && echo $GRUB_DEFAULT')
if [ "$gdef" != "saved" ]; then
   msg "enabling GRUB_DEFAULT=saved in /etc/default/grub"
   sed -i.back 's,^GRUB_DEFAULT=.*,GRUB_DEFAULT=saved,' /etc/default/grub ||
      fail "failed to enable GRUB_DEFAULT=saved"
   update-grub ||
      fail "failed update-grub to apply GRUB_DEFAULT=saved"
fi

[ -f "$kernel" ] || fail "did not find kernel"
submenu="Advanced options for Ubuntu"
prefix="Ubuntu, with Linux "
# VER-FLAV like '3.13.0-79-generic'
# /boot/vmlinuz-VER-FLAV -> vmlinuz-VER-FLAV
verflav=${kernel##*/}
# vmlinuz-VER-FLAV - VER-FLAV
verflav=${verflav#*-}

entry="${submenu:+${submenu}}>${prefix}$verflav"
if ! grep -q "$prefix$verflav" "/boot/grub/grub.cfg"; then
   fail "no $prefix$verflav entry in /boot/grub/grub.cfg"
fi

msg "selected $kernel. entry: ${entry}"

#grub-set-default "$entry"
grub-reboot "$entry"

## config
#!/bin/sh
# if you need a proxy set it here
export proxy=""
export GOPATH=${GOPATH:-$HOME}

## loop-commands
#!/usr/bin/env python
import os
import sys
import time
from subprocess import Popen, STDOUT

DEVNULL = open(os.devnull, 'wb', 0)

def runcmd(cmd):
    start = time.time()
    p = Popen(cmd, stdout=DEVNULL, stderr=STDOUT)
    ru = os.wait4(p.pid, 0)[2]
    elapsed = time.time() - start
    # real, user, system
    return {'real': elapsed, 'user': ru.ru_utime, 'system': ru.ru_stime}

def printmsg(name, data):
    ffmt = "8.3f"
    fmt = ("%(name)-10s:" +
           " real %(real)" + ffmt +
           " user %(user)" + ffmt +
           " system %(system) " + ffmt)
    mydata = data.copy()
    mydata['name'] = name
    print(fmt % mydata)


def runloop(commands, count, data):
    # first run not counted in results.
    for name, cmd in commands:
        curdata = runcmd(cmd)
        printmsg("run0 %s" % name, curdata)

    for n in range(count):
        for name, cmd in commands:
            curdata = runcmd(cmd)
            if name not in data:
                data[name] = curdata.copy()
            else:
                for k, v in curdata.items():
                    data[name][k] += v
            printmsg(name, curdata)
    for name, cmd in commands:
        printmsg("tot %s" % name, data[name])
        printmsg("avg %s" % name,
                 {k: v/count for k, v in data[name].items()})

commands = [
   ("clean", ['go', 'clean']),
   ("build", ['go', 'build']),
]

data = {}
count = int(sys.argv[1])
runloop(commands, count, data)

## proxy
#!/bin/sh
# if you need a http proxy, set here.
if [ -n "$proxy" ]; then
    export no_proxy="${no_proxy:+${no_proxy},}localhost,127.0.0.1,127.0.1.1,launchpad.net,ubuntu.com"
    export https_proxy="$proxy" http_proxy="$proxy"
fi
[ $# -eq 0 ] && set -- ${SHELL:-/bin/bash}
exec "$@"

## setup
#!/bin/sh

fail() { echo "$@" 1>&2; exit 1; }
filter_installed_packages() {
    # write to stdout, a list of packages not installed locally
    local fmt='${Package} ${Version}\n'
    LC_ALL=C dpkg-query --show "--showformat=${fmt}" "$@" 2>&1 | awk '
        $0 ~ /[Nn]o packages/ {
            sub("[.]$","",$NF);
            pkgs[n]=$NF;
            n=n+1;
        }
        $2 == "" {
                pkgs[n]=$1;
                n=n+1;
        };
        END { for(p in pkgs) {printf("%s ",pkgs[p])}; printf("\n"); }' n=0
}

[ -n "$GOPATH" ] || fail "must . config"

if command -v proxy >/dev/null; then
   proxycmd="$proxy"
elif [ -x "${0%/*}/proxy" ]; then
   proxycmd="$proxy"
fi

set -e
mkdir -p "$GOPATH/src"

deps="libgflags-dev libsnappy-dev zlib1g-dev libbz2-dev golang-1.6 git make g++"
missing=$(filter_installed_packages $deps)
if [ -n "$missing" ]; then
   echo "need $missing"
   sudo apt-add-repository -y ppa:mwhudson/go16-trusty
   sudo sh -c "apt-get update -q && apt-get install -qy $deps"
fi

## obc-peer depends on rocksdb.git (or one of its dependencies does)
## rockdb.git is a c++ project and is slow to watch build
## on one serverstack trusty vm took 8m32 seconds
cd "$GOPATH/src"
if [ ! -d rocksdb ]; then
    $proxycmd git clone https://github.com/facebook/rocksdb.git rocksdb ||
       fail "failed clone rocksdb.git"
fi
cd rocksdb
make static_lib
sudo make install

## download project
project="github.com/openblockchain/obc-peer"
cd "$GOPATH"
$proxycmd go get -v "$project"
cd "$GOPATH/src/$project"
$proxycmd go get -v