A brief introduction to git and Github

This presentation covers an introduction to distributed version control systems, moves on to explain the basics of git: how to track files, perform commits and fix merge conflicts. Finally, it provides links to different distributed workflows and focuses on the Central repository workflow. All of this is explained to work at the command line level but links to graphical interfaces are provided at the end of the presentation, together with some other useful resources.

1. A brief introduction to git and Github Kiko Fernandez-Reyes 1
2. Distributed Version Control System • Remote and local copies • Keep track of file changes • Knows what you did last summer • Remembers authorship Git: 2
3. Distributed Version Control System • Remote and local copies • Keep track of file changes • Knows what you did last summer • Remembers authorship Git: 2
4. Distributed Version Control System • Remote and local copies • Keep track of file changes • Knows what you did last summer • Remembers authorship Git: 2
5. Distributed Version Control System • Remote and local copies • Keep track of file changes • Knows what you did last summer • Remembers authorship Git: 2
6. Github & Git • Set up an account • Create a repository (repo) • Add things to your repo • Branch workflow • Share changes with your team 3
7. Git Basics
8. • Create Github account • Set up Git (link Github) 5 Linux & OS X $ git config --global push.default simple $ git config --global core.editor “subl -n -w” link config editors
9. • Create Github account • Set up Git (link Github) 5 Windows $ git config --global push.default simple $ git config --global core.editor “subl -n -w” link config editors
10. Create a repository (repo) Add collaborators to repo Clone repo on local machine $ git clone https://github.com/kikofernandez/git-intro.git $ git clone <address-repo> Remote Remote Local = the remote server, Github = your local machine Local Initial Steps: Remote
11. Create a repository (repo) Add collaborators to repo Clone repo on local machine $ git clone https://github.com/kikofernandez/git-intro.git Remote Remote Local = the remote server, Github = your local machine Local Initial Steps: Remote
12. Git: Basics 7 Local
13. Git: Basics 7 Holds actual files Which files form commit Commits Local
14. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> Changes that make up a commit Commands: $ git commit -m “message” Local
15. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md Changes that make up a commit Commands: $ git commit -m “message” Local
16. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md $ git add intro.md Changes that make up a commit Commands: $ git commit -m “message” Local
17. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md $ git add intro.md Changes that make up a commit Commands: $ git commit -m “message” Local
18. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md $ git add intro.md Changes that make up a commit Commands: $ git commit -m “message” $ git commit -m “add intro.md file” Local
19. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md $ git add intro.md Changes that make up a commit Commands: $ git commit -m “message” $ git commit -m “add intro.md file” Local
20. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md $ git add intro.md Changes that make up a commit Commands: $ git commit -m “message” $ git commit -m “add intro.md file” this is an introduction to the course … intro.md Local
21. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md $ git add intro.md Changes that make up a commit Commands: $ git commit -m “message” $ git commit -m “add intro.md file” this is an introduction to the course … intro.md Local
22. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md $ git add intro.md Changes that make up a commit Commands: $ git commit -m “message” $ git commit -m “add intro.md file” this is an introduction to the course … intro.md this is an introduction to the course … intro.md Local
23. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md $ git add intro.md Changes that make up a commit Commands: $ git commit -m “message” $ git commit -m “add intro.md file” this is an introduction to the course … intro.md this is an introduction to the course … intro.md Local
24. Git: Basics 8 Working Directory Staging Area Folder of your repository, e.g. ~/git-intro Commands: $ git add <file> this is an introduction to the course … intro.md $ git add intro.md Changes that make up a commit Commands: $ git commit -m “message” $ git commit -m “add intro.md file” this is an introduction to the course … intro.md this is an introduction to the course … intro.md Local
25. Git: Logs 9 $ git log -p How do I see the changes? Remote Local
26. Git: Logs 9 $ git log -p How do I see the changes? Remote Local
27. Git: Logs 9 $ git log -p How do I see the changes? Remote Local
28. Git: Logs 9 $ git log -p How do I see the changes? Remote Local
29. Commit early, commit often A tip for version controlling - not for relationships ( ) 10 Best tip you will ever receive:
30. Git branching (optional) 11
31. Git: Branching Local 3ddf4 master Branches: they are pointers to commits / versions Default branch: master $ git add intro.md; git commit -m “update” 12
32. Git: Branching Local 3ddf4 master Branches: they are pointers to commits / versions Default branch: master $ git add intro.md; git commit -m “update” 12ab56 12
33. Git: Branching Local 3ddf4 master Branches: they are pointers to commits / versions Default branch: master $ git add intro.md; git commit -m “update” 12ab56 3eee8 12
34. Git: Branching Local 3ddf4 master Branches: they are pointers to commits / versions Default branch: master 13
35. Git: Branching Local 3ddf4 master Branches: they are pointers to commits / versions Default branch: master $ git branch frontend frontend 13
36. Git: Branching Local 3ddf4 HEAD master Branches: they are pointers to commits / versions Default branch: master $ git branch frontend frontend HEAD: pointer to the current branch 13
37. Git: Branching Local 3ddf4 HEAD master Branches: they are pointers to commits / versions Default branch: master $ git branch frontend frontend HEAD: pointer to the current branch $ git checkout frontend 13
38. Git: Branching Local 3ddf4 HEAD Branches: they are pointers to commits / versions Default branch: master $ git branch frontend HEAD: pointer to the current branch $ git checkout frontend master frontend 13
39. Git: Branching Local 3ddf4 HEAD Branches: they are pointers to commits / versions Default branch: master $ git branch frontend 12ab56 HEAD: pointer to the current branch $ git checkout frontend master frontend $ git commit -a -m “commit everything” 13
40. Git: Branching Local 3ddf4 HEAD Branches: they are pointers to commits / versions Default branch: master $ git branch frontend 12ab56 3eee8 HEAD: pointer to the current branch $ git checkout frontend master frontend $ git commit -a -m “commit everything” 13
41. Git: Branching Local 3ddf4 HEAD Branches: they are pointers to commits / versions Default branch: master 12ab56 3eee8 HEAD: pointer to the current branch master frontend 14
42. Git: Branching Local 3ddf4 HEAD Branches: they are pointers to commits / versions Default branch: master $ git checkout master 12ab56 3eee8 HEAD: pointer to the current branch master frontend 14
43. Git: Branching Local 3ddf4 HEAD master Branches: they are pointers to commits / versions Default branch: master $ git checkout master frontend 12ab56 3eee8 HEAD: pointer to the current branch 14
44. Git: Branching Local 3ddf4 HEAD master How to merge master with the changes in frontend? $ git merge frontend frontend 12ab56 3eee8 HEAD: pointer to the current branch 15
45. Git: Branching Local 3ddf4 HEAD master How to merge master with the changes in frontend? $ git merge frontend frontend 12ab56 3eee8 HEAD: pointer to the current branch 15
46. Git Conflicts
47. + Test test + This is my first line Git: Conflicts Local 3ddf4 $ git merge frontend frontend 12ab56 3eee8 17 HEAD master Commits: 12ab56 and 3eee8 add a line in same file
48. + Test test + This is my first line Git: Conflicts Local 3ddf4 $ git merge frontend frontend 12ab56 3eee8 17 6664f HEAD master Commits: 12ab56 and 3eee8 add a line in same file
49. + Test test + This is my first line Git: Conflicts Local 3ddf4 $ git merge frontend frontend 12ab56 3eee8 17 6664f HEAD master Conflicts: 12ab56 and 3eee8 update same line Commits: 12ab56 and 3eee8 add a line in same file
50. + Test test + This is my first line Git: Conflicts Local 3ddf4 $ git merge frontend frontend 12ab56 3eee8 17 6664f HEAD master Conflicts: 12ab56 and 3eee8 update same line Commits: 12ab56 and 3eee8 add a line in same file
51. + Test test + This is my first line Git: Conflicts Local 3ddf4 $ git merge frontend frontend 12ab56 3eee8 17 6664f HEAD master Conflicts: 12ab56 and 3eee8 update same line Commits: 12ab56 and 3eee8 add a line in same file
52. + Test test + This is my first line Git: Conflicts Local 3ddf4 $ git merge frontend frontend 12ab56 3eee8 17 6664f HEAD master Conflicts: 12ab56 and 3eee8 update same line Commits: 12ab56 and 3eee8 add a line in same file
53. + Test test + This is my first line Git: Conflicts Local 3ddf4 $ git merge frontend frontend 12ab56 3eee8 17 6664f HEAD master Conflicts: 12ab56 and 3eee8 update same line Commits: 12ab56 and 3eee8 add a line in same file
54. Git conflicts: Recipe $ git add <name-of-files-with-conflicts> $ git commit When you get conflicts: 1. fix the conflicts 2. 3.
55. Team work 19
56. Github ❤ Git • So far, your changes are in local computer • Problem: What if you drop the computer? Work in Teams? 20
57. Github ❤ Git • So far, your changes are in local computer • Problem: What if you drop the computer? Work in Teams? • Solution: Github saves your work in the “cloud” 20
58. Github ❤ Git • Push your local changes to your remote repository $ git push origin master Name of the remote url: by default, it’s always called origin Name of your branch: your initial branch is always called master 21 Remote $ git remote -v
59. Github ❤ Git • Pull remote changes to your local repository $ git pull origin master Name of the remote url: by default, it’s always called origin Name of the local branch to pull into: your initial branch is always called master 22 Remote $ git remote -v
60. 3ddf4 HEAD master The remote end is similar to a branch $ git commit -am “commit everything” origin/master HEAD: pointer to the current branch 23 Github ❤ Git Remote
61. 3ddf4 HEAD master The remote end is similar to a branch $ git commit -am “commit everything” origin/master 12ab56 HEAD: pointer to the current branch 23 Github ❤ Git Remote
62. 3ddf4 HEAD master The remote end is similar to a branch $ git commit -am “commit everything” origin/master 12ab56 3eee8 HEAD: pointer to the current branch 23 Github ❤ Git Remote
63. 3ddf4 HEAD master The remote end is similar to a branch $ git commit -am “commit everything” origin/master 12ab56 3eee8 HEAD: pointer to the current branch 23 Github ❤ Git Remote $ git push origin master
64. 3ddf4 HEAD master The remote end is similar to a branch $ git commit -am “commit everything” origin/master 12ab56 3eee8 HEAD: pointer to the current branch 23 Github ❤ Git Remote $ git push origin master
65. Distributed Recipes • Centralised Workflow • Integration-Manager Workflow • Dictator-Lieutenants Workflow *recipes = workflow
66. Distributed Recipes • Centralised Workflow • Integration-Manager Workflow • Dictator-Lieutenants Workflow *recipes = workflow
67. Centralised recipe $ git pull origin master Easy start: everyone works on the same branch $ git add <files> Do some work $ git commit -m “<message>” $ git push origin master rinse and repeat Works until you get conflicts
68. 3ddf4 HEAD master 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master origin/master origin/master @kikofernandez @supercooldave @supercooldave
69. 3ddf4 HEAD master 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master origin/master origin/master $ git commit -am “stuff” @kikofernandez @supercooldave @supercooldave
70. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master origin/master origin/master $ git commit -am “stuff” @kikofernandez @supercooldave @supercooldave
71. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master origin/master origin/master $ git commit -am “stuff” $ git commit -am “work” @kikofernandez @supercooldave @supercooldave
72. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master 3eba4 origin/master origin/master $ git commit -am “stuff” $ git commit -am “work” @kikofernandez @supercooldave @supercooldave
73. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master 3eba4 origin/master origin/master $ git push origin master $ git commit -am “stuff” $ git commit -am “work” @kikofernandez @supercooldave @supercooldave
74. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master 3eba4 origin/master origin/master $ git push origin master $ git commit -am “stuff” $ git commit -am “work” 12ab56 @kikofernandez @supercooldave @supercooldave
75. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master 3eba4 origin/master origin/master $ git push origin master $ git commit -am “stuff” $ git commit -am “work” $ git push origin master 12ab56 @kikofernandez @supercooldave @supercooldave
76. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master 3eba4 origin/master origin/master $ git push origin master $ git commit -am “stuff” $ git commit -am “work” $ git push origin master 12ab56 @kikofernandez @supercooldave @supercooldave error: failed to push some refs to '/path/to/repo.git' hint: Updates were rejected because the tip of your current branch is behind hint: its remote counterpart. Merge the remote changes (e.g. 'git pull') hint: before pushing again. hint: See the 'Note about fast-forwards' in 'git push --help' for details.
77. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master 3eba4 origin/master origin/master $ git push origin master $ git commit -am “stuff” $ git commit -am “work” $ git push origin master 12ab56 @kikofernandez @supercooldave @supercooldave
78. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master 3eba4 origin/master origin/master $ git push origin master $ git commit -am “stuff” $ git commit -am “work” $ git push origin master 12ab56 @kikofernandez @supercooldave $ git pull origin master @supercooldave
79. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master 3eba4 origin/master origin/master $ git push origin master $ git commit -am “stuff” $ git commit -am “work” $ git push origin master 12ab56 @kikofernandez @supercooldave $ git pull origin master 12ab56 87abe @supercooldave
80. 3ddf4 HEAD master 12ab56 26 Conflicts in Centralised recipe @kikofernandez 3ddf4 origin/master Github 3ddf4 HEAD master 3eba4 origin/master origin/master $ git push origin master $ git commit -am “stuff” $ git commit -am “work” $ git push origin master 12ab56 @kikofernandez @supercooldave $ git pull origin master 87abe $ git push origin master 12ab56 87abe 3eba4 @supercooldave
81. Useful links • Conflict example (for you to practice) • Git - the simple guide • Github: Bootcamp • Git: Cheatsheet • Learn enough git to be dangerous • CodeSchool: Try git 27
82. Graphical Interfaces SourceTree GithubDesktop
83. Summary Introduction to git and Github & Distributed workflows so…
84. Summary Introduction to git and Github & Distributed workflows so… let’s git some fun
85. Thanks Feedback is welcome (email) or at the end of the course