be a happier developer with git / productive team #gettinggitright

WiFi: username / password

A couple of Atlassians who get Git and dig the DAG

Tim PettersenDeveloper Advocate

@kannonboy

Abhin ChhabraBitbucket Developer

@abhin_chhabra

The State of Git 15 min

Happier Developers 40 min

A bit about Stash 10 mins

Productive Teams 40 min

Break 10 min

• Fill out survey, win awesome stuff (check the email you registered with)

!

• Tweet stuff with #gettinggitright !

• WiFi: username / password !

• Bathroom?

Who knows

?

Facts

500 Developers

Facts

1000+ Nerds

Facts

working on 9 products

SoftwareWe

or in just 3 words

SoftwareWe Teams

really small team

they know what’s going on!

Let’s do it!

Great idea!

Productivity++

team is growing

Let’s do it! Great! Why?

Who will do it?Is it done? Have you

talked to QA?

I have no time for this!

Productivity?

Productivity??

we’re not alone

Is it profitable?!

When is it done?!

is a

Devel ping S ftware

S cial Challenge

Tools

happy developers & productive teams Ship software

faster & smarter

Ship software faster & smarter

happy developers & productive teams

Git is on the rise

15%

38%

from 2011 to 2013Source: RedMonk Git Survey 2013

Git will continue to grow!

63%

37%

December 2015

Git

CVS + SVN

Source: Atlassian Git Survey 2013

Git works for the enterprise!

60%100+ developers

1,000+ employees

Source: Atlassian Git Survey 2013

Git works for the enterprise!

27%

69%

use the cloud

develop on-premise

Source: CollabNet Git Survey 2013

Git means fast releases

Git

SVN CVS

mainly daily - weekly

mainly monthly

Source: Atlassian Git Survey 2013

Better code with Git

Code Reviews when using GIT

+15% more

thank you Pull Requests!

Source: Atlassian Git Survey 2013

atlassian.com/git

Migrating soon?

is just a tool!

WiFi: bcenter

Happier Developerwith

Be a

Erik van Zijst!Bitbucket Developer

Tim Pettersen!Developer Advocate

September 2014!with! and!

Happier Developerwith

Be a

Abhin Chhabra !Bitbucket Developer

Tim Pettersen!Developer Advocate

September 2014!with! and!

Time machine without paradoxes?

Explore & Understand

1

3

Speed, Speed, Speed

Control and Assemble4

Why does make you happy?

2 Freedom & Safety

1

Fast is the new Black

Speed, speed, Speed

Everything is local

Except push & pull

Written in C by Linux kernel and filesystem

developers

Read: fast :D

But what if my repo is big?

446k lines of code added

1

3

Recent Linux kernel release (3.13) has 15+ million LOC

1,339 contributors4

2 12,000 non-merge commits

source lwn.net

2 Freedom & Safety

Feature Branching

Feature Branching

Feature branches: local

git checkout -b new-branch creates a branch and switches to it

Feature branches: published (remote)

git push origin new-branch pushes a local branch remotely

git stash is awesomeIt’s a way to

temporarily save your work on a stack

So if your boss comes screaming at your desk

Safety

Losing work is very hard

very very

maybe your git server crashed and the hd is

corrupted?… no problem

Redundancy, every developer has a clone

Chain of unlosability

Recover a file

git checkout file-name

Recover a commit

git checkout sha-1

git checkout ref (branch/tag)

or

Print file as in branch

git show branch:path/to/file

can be any ref

find a deleted method

git log -S<string> search through all history

When all is lost, use the reflog

More on recovery!http://bit.do/recovering

Explore & Understand 3

= history superpowers

Hard Questions to git logAsk

-S string in all diffs--after,--before when?--author who did what

Who deleted that?git log -1 -- [path] lists where a file was deleted

git log --diff-filter=D --summary lists all deleted files

Where is that constant?

git grep <regexp> compare the speed between this and regular grep or ack…you’ll be blown

away

have I merged this?

git branch --no-merged lists branches not merged

git branch --merged lists branches already merged

Control and Assemble4

What is a merge?

Merge commit

master

feature

merges keep the context of the

feature’s commits

git knows the ancestry

1

2

The merge is local

powerful merge strategies3

merge is better in git

merge becomes a non-event

In most cases

rebase: Rewrite history with safety belts on

feature

master

What is a rebase?

It’s a way to replay commits, one by one,

on top of a branch

master

feature

What is a rebase?

preserving the order of commits

What is an --interactive rebase?

It’s a way to replay commits, one by one,

deciding interactively what to do with each

reword fixup

pick squash

edit exec

CUSTOMARY WARNING!

rebase rewrites history!

Treat this power with great care. Only rewrite history of local branches or…

Explore & Understand

1

3

Speed, Speed, Speed

Control and Assemble4

Why does make you happy?

2 Freedom & Safety

Happy Developerwith

A

WiFi: bcenter

Productive Team withA

Improving Code Quality

1

2

Efficient Workflows

Better Collaboration3

Why makes a team great!

4 Natural Fit

Efficient Workflows

upcoming Release ?Can we still fix a bug for the

FeatureIs the code for that

complete?

for the current version?HotfixHow do we

do

ReviewedHas everyone

the code for this feature ?

Git workflow?What’s the best

We don’t know!

+ different teams+ different products

different cultures

= different workflows

Git workflow?What’s the best

DesignWorkflows

your own

Issues Code

Issues Code

JIRA-456

JIRA-123JIRA-123

JIRA-456

Can’t be released right now

Unfinished features in your trunk / master branch

Branch per issueFirst:

feature/JIRA-30

stable master branch

isolated feature work

master

feature/JIRA-30-user-

Branch per issueFirst:

branch type

issue key

description

bugfix/JIRA-31-

Branch per issueFirst:

branch type

issue key

description

hotfix/JIRA-32-broke-

Branch per issueFirst:

branch type

issue key

description

Typos happne!Tool switching sucks

Is the branch green?

Branch name pre-populated

Confounding build breakages

master

Confounding build breakages

bugfix/

master

Atlassian Marketplace1Workflow

SAAS Workflow

Simplest Workflow

release from here

feature/JIRA-30

feature/JIRA-45

master

Simple Workflowrelease from here

feature/JIRA-30

feature/JIRA-45

develop

masterintegrate here

Atlassian Stash2Workflow

Installable software

Multiple Product Versions

feature/JIRA-30

master

v 1.2

v 1.1

Multiple Product Versions

master

v 1.2

v 1.1

bugfix/JIRA-41

Multiple Product Versions

master

v 1.2

v 1.1

bugfix/JIRA-41

Multiple Product Versions

master

v 1.2

v 1.1

bugfix/JIRA-45

Multiple Product Versions

master

v 1.2

v 1.1

bugfix/JIRA-45

Multiple Product Versions

master

v 1.2

v 1.1

bugfix/JIRA-45

boring work

Automatic merges

https://bitbucket.org/durdn/automatic-merge-hook

with a Git hook

Automatic mergeswith Stash

Design your workflow

Nearly everything is possible with

Improving Code Quality

CodeReview

Photo: Yogi (Flickr)

Better Code

Shared Knowledge

Team Ownership

G = 1

R+1

Developer guilt

Team Ownership

Code Reviews

Pull Requests

Pull Requests

do it before merge

Pull Requests

Pull Request Creation

Pull Request Creation

Pull Request Creation

Discuss

Discuss your changes

Discuss your changes

Side by side diff the choice is yours

invited reviewers

invited reviewers

minimum X approvals

Go merge!

Pull Request Merge Checks

Who would be

the best to reviewmy code?

Auto Suggest Reviewers

Free Add On For

Auto Suggest Reviewers

suggestions

why?

committed code to this Pull Request

Suggestions:

contributed files that were modified

Better Collaboration

Working with contractors?

Circle of Trust

Photo: Aljaz Zajc

Strangers on the internet

Contractors

Interns

Other product teams

SupportCore dev team

Circle of Trust

Collaboration with SVN

Core dev team

Everyone else

emailing patches repository tarballs hell-ish conflicts

Collaboration with forks

Everyone else

Core dev team Changes

automatically synchronize downstream

.. but must be reviewed

before moving upstream

feature

Collaboration with branches

Senior developers

Junior developers

maste

Permissions for Branches with

Permissions for Branches with

Strangers on the internet

Interns

Other product teams

SupportCore dev team

Contractors

Know your priorities

Security DevSpeed

Natural Fit

to your existing flow

There is so much going on in our projects!

Pull Requests

Sprints

Builds

Issues

Branches

& CI

manually triggered

automatically triggered

Building branches

maste

always build master

Less time configuringmore time to code

Every line of code starts with

Real Life Problema

Every line of code starts with

Issuean

Visualize your development

IN PROGRESS

Status People Code

Issue

good old days

Visualize your development

Issue

Sprint Branch Pull Request

Build

2014 style

Visualize your development

Automatic Issue Transitions

feature/JIRA-30

master

IN REVIEW DONEIN PROGRESSOPEN

See what’s going onBuildswithBots

PagesIssues Branches Pull Requests etc.

More time to codeBetter collaborationDev productivityThe future

Economics

Why Git?

Deliver software faster

Less bugs

Happy customers

Why Git?

Ship software faster & smarter

So now you can answer “Why Git?”

Let’s talk a little bit about “Why ?”

Why ?

157

1. BEST enterprise Git workflow 2. Integrations & extensibility 3. Scalability

158

feature/STASH-123

master

The Best Git Workflow

X reviewers approved? Y builds passed? All tasks complete?

159

feature/STASH-123

master

The Best Git Workflow

• Pull request merge checks • Repository hooks • Branch permissions • Flexibility & extensibility

160

Powerful integrations

161

Plugin APIs • Full Java API • Repository Hooks • Merge Checks • User Interface • REST end-points • Filetype renderers • SSH commands

Stash Platform

Branch Permissions REST APIs Git SCM

Source? You betcha!

162

RESTful APIs insert /rest/api/latest

163

RESTful APIs insert /rest/api/latest

164

Scalability

Request prioritization

165

Scalability

Request queuing

166

Scalability

Response Caching

167

Scalability

Clustering

All sorts of teams are on&

Why ?

170

• BEST enterprise Git workflow • Integrations & extensibility • Scalability

Please fill out our survey

to get a t-shirt

win wireless headphones

tweet #gettinggitright

Fill out our survey to

Get a “Stash” photo and

(check your email)

Q & A$10 for up to 10 devs

Free for 5 users Totally free

Free basic version