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Commandless Git

Avatar for Alex Tercete Alex Tercete
April 07, 2015
Programming
1
220

Commandless Git

Having a basic understanding of how Git works is the key to taking the most out of it.

Avatar for Alex Tercete

Alex Tercete

April 07, 2015
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Transcript

  1. Commandless Git https://www.flickr.com/photos/sfxeric/4578550858

  2. Alex Tercete @alextercete Rio de Janeiro, Brazil EnergyHelpline

  3. https://www.flickr.com/photos/cdevers/3292421477

  4. https://www.flickr.com/photos/cdevers/4618787095

  5. https://www.flickr.com/photos/cdevers/4618786545

  6. Simplified Model

  7. Engine Fuel Transmission Wheels Brakes Steering

  8. Engine Fuel Transmission Wheels Brakes Steering

  9. Engine Fuel Transmission Wheels Brakes Steering

  10. Engine Fuel Transmission Wheels Brakes Steering

  11. Brakes Engine Fuel Transmission Wheels Steering

  12. Makes things intuitive

  13. Brakes Engine Fuel Transmission Wheels Steering Brake

  14. Brakes Engine Fuel Transmission Wheels Steering

  15. Brakes Engine Fuel Transmission Wheels Steering

  16. It works, but not as it was meant to

  17. Brakes Engine Fuel Transmission Wheels Steering

  18. Brakes Engine Fuel Transmission Wheels Steering

  19. None

  20. Working directory Staging area path/to/A.txt path/to/B.txt Files database Add

  21. Working directory Staging area path/to/A.txt path/to/B.txt Files database

  22. Working directory Staging area path/to/A.txt path/to/B.txt Files database Hash generation

    SHA1 c3

  23. Working directory Staging area path/to/A.txt path/to/B.txt Files database Hash generation

    c3 SHA1

  24. Working directory Staging area path/to/A.txt path/to/B.txt Files database c3

  25. Working directory Staging area path/to/A.txt path/to/B.txt Files database c3

  26. Working directory Staging area path/to/A.txt c3 path/to/A.txt path/to/B.txt Files database

    c3

  27. Working directory Staging area path/to/A.txt c3 path/to/A.txt path/to/B.txt Files database

    c3 Hash generation SHA1 ed

  28. Working directory Staging area path/to/A.txt c3 path/to/A.txt path/to/B.txt Files database

    c3 Hash generation SHA1 ed ed

  29. c3 ed Files database Working directory Staging area path/to/A.txt c3

    path/to/A.txt path/to/B.txt

  30. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    c3 ed path/to/A.txt path/to/B.txt

  31. – Hash is generated for the file’s content – Generated

    hash is the same for identical inputs – Files are saved to the files database – Changes are added to the staging area Add

  32. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    c3 ed path/to/A.txt path/to/B.txt Commit

  33. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    c3 ed path/to/A.txt path/to/B.txt

  34. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    c3 ed path/to/A.txt path/to/B.txt Hash generation SHA1 ca c3 ed

  35. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    c3 ed path/to/A.txt path/to/B.txt Hash generation SHA1 ca c3 ed path/to/A.txt path/to/B.txt c3 ed Commit ca

  36. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    path/to/A.txt path/to/B.txt c3 ed Commit ca

  37. c3 ed Files database Working directory Staging area Commit ca

    path/to/A.txt path/to/B.txt path/to/A.txt path/to/B.txt c3 ed Commits tree ca

  38. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca

  39. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca other/path/to/C.txt

  40. c3 ed Files database Working directory Staging area path/to/A.txt Commits

    tree ca path/to/B.txt other/path/to/C.txt

  41. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca other/path/to/C.txt path/to/B.txt other/path/to/C.txt 17 2b 17 2b

  42. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca other/path/to/C.txt path/to/B.txt other/path/to/C.txt 17 2b 17 2b Hash generation SHA1 c3 17 7b 2b ca path/to/A.txt path/to/B.txt c3 17 Commit 7b other/path/to/C.txt 2b

  43. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca other/path/to/C.txt 17 2b path/to/A.txt path/to/B.txt c3 17 Commit 7b other/path/to/C.txt 2b 7b

  44. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca other/path/to/C.txt 17 2b 7b

  45. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca other/path/to/C.txt 17 2b 7b

  46. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca other/path/to/C.txt 17 2b 7b other/path/to/C.txt 6d 6d

  47. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca other/path/to/C.txt 17 2b 7b other/path/to/C.txt 6d 6d Hash generation SHA1 c3 17 6d path/to/A.txt path/to/B.txt c3 17 Commit 33 other/path/to/C.txt 6d 33 7b

  48. c3 ed Files database Working directory Staging area path/to/A.txt path/to/B.txt

    Commits tree ca other/path/to/C.txt 17 2b 7b 6d 33

  49. – Hash is generated combining • Hash of the parent

    commit • Hashes of the files in the commit – Points to every file tracked by the repository – Staging area is cleared after the commit – Gets added to the commits tree Commit

  50. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 33 master 33 Branch

  51. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 33 master 33

  52. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 33 master 33

  53. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 33 master 33 feature/something 33

  54. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 33 master 33 feature/something 33

  55. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 33 master 33 feature/something 33 8e

  56. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 33 master 33 feature/something 33 8e 4c

  57. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 4c master 33 feature/something 4c 8e 4c

  58. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 4c master 33 feature/something 4c 8e 4c

  59. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 4c master 33 feature/something 4c 8e 4c ff

  60. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 4c master 33 feature/something 4c 8e 4c ff 54

  61. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 54 master 33 feature/something 54 8e 4c ff 54

  62. – HEAD indicates the current commit being pointed to –

    There is nothing special about master – When on a branch, the reference gets updated after a commit Branch

  63. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 54 master 33 feature/something 54 8e 4c ff 54 Checkout

  64. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 54 master 33 feature/something 54 8e 4c ff 54

  65. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD ca master 33 feature/something 54 8e 4c ff 54

  66. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD ca master 33 feature/something 54 8e 4c ff 54

  67. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca 17 2b 7b 6d 33 References HEAD ca master 33 feature/something 54 8e 4c ff 54

  68. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca 17 2b 7b 6d 33 References HEAD 54 master 33 feature/something 54 8e 4c ff 54

  69. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca 17 2b 7b 6d 33 References HEAD 54 master 33 feature/something 54 8e 4c ff 54

  70. c3 ed Files database Working directory path/to/A.txt path/to/B.txt Commits tree

    ca other/path/to/C.txt 17 2b 7b 6d 33 References HEAD 54 master 33 feature/something 54 8e 4c ff 54

  71. – Only HEAD moves – Files are copied from the

    files database into the working directory – Files database remains unaltered – Commits tree remains unaltered Checkout

  72. Files database Commits tree ca 7b 33 References HEAD 54

    master 33 feature/something 54 4c 54 c3 ed 17 2b 6d 8e ff Merge

  73. Files database Commits tree ca 7b 33 References HEAD 54

    master 33 feature/something 54 4c 54 c3 ed 17 2b 6d 8e ff

  74. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 feature/something 54 4c 54 c3 ed 17 2b 6d 8e ff

  75. Files database Commits tree ca 7b 33 References HEAD e6

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98

  76. Files database Commits tree ca 7b 33 References HEAD e6

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98 Merge NO CONFLICTS

  77. Files database Commits tree ca 7b 33 References HEAD e6

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98

  78. Files database Commits tree ca 7b 33 References HEAD 2f

    master 2f feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98 2f

  79. Files database Commits tree ca 7b 33 References HEAD e6

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98 Merge WITH CONFLICTS

  80. Files database Commits tree ca 7b 33 References HEAD e6

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98

  81. Files database Commits tree ca 7b 33 References HEAD b5

    master b5 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98 57 b5

  82. – Brings changes from other branch into current branch –

    Conflict resolution is done once – Commit has two parents Merge

  83. Files database Commits tree ca 7b 33 References HEAD e6

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98 Rebase NO CONFLICTS

  84. Files database Commits tree ca 7b 33 References HEAD e6

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98

  85. Files database Commits tree ca 7b 33 References HEAD 54

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98

  86. Files database Commits tree ca 7b 33 References HEAD a2

    master e6 feature/something 54 a2 e6 c3 ed 17 2b 6d 8e ff 98 4c 54

  87. Files database Commits tree ca 7b 33 References HEAD 9f

    master e6 feature/something 54 a2 e6 c3 ed 17 2b 6d 8e ff 98 4c 9f 54

  88. Files database Commits tree ca 7b 33 References HEAD 9f

    master e6 feature/something 9f a2 e6 c3 ed 17 2b 6d 8e ff 98 4c 9f 54

  89. Files database Commits tree ca 7b 33 References HEAD 54

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98 Rebase WITH CONFLICTS

  90. Files database Commits tree ca 7b 33 References HEAD 54

    master e6 feature/something 54 4c 54 e6 c3 ed 17 2b 6d 8e ff 98

  91. Files database Commits tree ca 7b 33 References HEAD dd

    master e6 feature/something 54 dd e6 c3 ed 17 2b 6d 8e ff 98 4c 54 7f

  92. Files database Commits tree ca 7b 33 References HEAD b8

    master e6 feature/something 54 dd e6 c3 ed 17 2b 6d 8e ff 98 4c 54 7f b8

  93. Files database Commits tree ca 7b 33 References HEAD b8

    master e6 feature/something b8 dd e6 c3 ed 17 2b 6d 8e ff 98 4c 54 7f b8

  94. – Puts changes introduced by current branch onto other branch

    – Conflict resolution is done for each commit – No extra commits are made Rebase

  95. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Push

  96. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin

  97. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree

  98. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree origin/master 33

  99. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree origin/master 33 c3 ed 17 2b 6d

  100. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree origin/master 33 c3 ed 17 2b 6d ca 7b 33

  101. – There is nothing special about origin – Tracking branch

    gets updated before uploading data to the remote – The remote is just another repository Push

  102. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree origin/master 33 c3 ed 17 2b 6d ca 7b 33 Fetch

  103. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree origin/master 33 c3 ed 17 2b 6d ca 7b 33

  104. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree origin/master 33 c3 ed 17 2b 6d ca 7b 33 62 b0 0e fa

  105. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree origin/master 33 c3 ed 17 2b 6d ca 7b 33 62 b0 0e fa 0e fa

  106. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree origin/master 33 c3 ed 17 2b 6d ca 7b 33 62 b0 0e fa 0e fa 62 b0

  107. Files database Commits tree ca 7b 33 References HEAD 33

    master 33 c3 ed 17 2b 6d origin http://url Remotes Remote origin Files database Commits tree origin/master b0 c3 ed 17 2b 6d ca 7b 33 62 b0 0e fa 0e fa 62 b0

  108. – Tracking branch gets updated after downloading data from the

    remote – Merge or rebase can be performed afterwards Fetch

  109. https://www.flickr.com/photos/inthe-arena/15501000164

  110. Reset Stash Revert

  111. http://git-scm.com/book

  112. Alex Tercete @alextercete speakerdeck.com/alextercete/commandless-git

  113. Thank you! https://www.flickr.com/photos/sfxeric/4578550858