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1 | git-cheat-sheet |
2 | =============== | |
3 | ||
4 | How to do stuff with git | |
6b6ba9f3 | 5 | |
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6 | Staging a subset of changes in a file |
7 | ------------------------------------- | |
8 | ||
9 | git add -p | |
10 | ||
11 | y - stage this hunk | |
12 | n - do not stage this hunk | |
13 | q - quit; do not stage this hunk or any of the remaining ones | |
14 | a - stage this hunk and all later hunks in the file | |
15 | d - do not stage this hunk or any of the later hunks in the file | |
16 | g - select a hunk to go to | |
17 | / - search for a hunk matching the given regex | |
18 | j - leave this hunk undecided, see next undecided hunk | |
19 | J - leave this hunk undecided, see next hunk | |
20 | k - leave this hunk undecided, see previous undecided hunk | |
21 | K - leave this hunk undecided, see previous hunk | |
22 | s - split the current hunk into smaller hunks | |
23 | e - manually edit the current hunk | |
24 | ? - print help | |
25 | ||
26 | https://git-scm.com/docs/git-add#Documentation/git-add.txt-patch | |
27 | ||
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28 | |
29 | Splitting a repo | |
30 | ---------------- | |
31 | ||
aa63a549 | 32 | ##### Remove history of all but select files in cloned repo |
6b6ba9f3 | 33 | ```sh |
fe790851 | 34 | $ git clone old new |
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35 | $ cd new |
36 | $ git clean -dfx | |
37 | $ git gc --aggressive --prune=now | |
38 | $ git remote rm origin | |
39 | $ git filter-branch \ | |
40 | --prune-empty \ | |
41 | --index-filter ' | |
42 | git ls-tree -r --name-only HEAD \ | |
43 | | grep -v file_i_want_to_keep_1 \ | |
44 | | grep -v file_i_want_to_keep_.. \ | |
45 | | grep -v file_i_want_to_keep_n \ | |
46 | | xargs git rm --cached -r --ignore-unmatch | |
47 | ' \ | |
48 | HEAD | |
49 | $ git gc --aggressive --prune=now | |
50 | ``` | |
51 | ||
aa63a549 | 52 | ##### Remove history of previously-removed (not in current tree) files |
6b6ba9f3 | 53 | ```sh |
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54 | $ git log --pretty=format: --name-status \ |
55 | | awk '$0 != "" {print $2}' \ | |
56 | | sort -u > /tmp/tree.old | |
6b6ba9f3 | 57 | $ git ls-tree -r --name-only HEAD > /tmp/tree.new |
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58 | $ git filter-branch \ |
59 | --prune-empty \ | |
60 | --index-filter ' | |
61 | grep -Fvxf /tmp/tree.new /tmp/tree.old \ | |
62 | | xargs git rm --cached -r --ignore-unmatch | |
63 | ' \ | |
64 | HEAD | |
6b6ba9f3 | 65 | ``` |
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66 | |
67 | ||
68 | Inserting a new root commit | |
69 | --------------------------- | |
70 | ```sh | |
71 | git checkout --orphan $TEMP_BRANCH | |
64e53fa7 | 72 | git rm -rf * |
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73 | git commit --allow-empty -m $INIT_COMMIT_MSG |
74 | git rebase --onto $TEMP_BRANCH --root $MAIN_BRANCH | |
75 | git branch -d $TEMP_BRANCH | |
76 | ``` | |
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77 | |
78 | ||
79 | Deleting all tags, locally and remotely | |
80 | --------------------------------------- | |
81 | ```sh | |
82 | for tag in `git tag`; | |
83 | do | |
84 | git tag -d $tag | |
b5a37a6e | 85 | git push $REMOTE_NAME :refs/tags/$tag |
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86 | done |
87 | ``` | |
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88 | |
89 | ||
90 | Get an older version of a file | |
91 | ------------------------------ | |
92 | ||
93 | ```sh | |
94 | git cat-file -p $COMMIT_DIGEST:$FILE_PATH | |
95 | ``` | |
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96 | |
97 | ||
98 | Splitting a commit | |
99 | ------------------ | |
100 | ||
101 | From [docs](https://git-scm.com/docs/git-rebase#_splitting_commits): | |
102 | ||
103 | - Start an interactive rebase with `git rebase -i <commit>^`, where `<commit>` | |
104 | is the commit you want to split. | |
105 | - Mark the commit you want to split with the action "edit". | |
106 | - When it comes to editing that commit, execute `git reset HEAD^`. The effect | |
107 | is that the HEAD is rewound by one, and the index follows suit. However, the | |
108 | working tree stays the same. | |
109 | - Now add the changes to the index that you want to have in the first commit | |
110 | (`git add`) | |
111 | - Commit the now-current index with whatever commit message is appropriate now. | |
112 | - Repeat the last two steps until your working tree is clean. | |
113 | - Continue the rebase with `git rebase --continue`. | |
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114 | |
115 | ||
116 | Merge 2 repos | |
117 | ------------- | |
118 | ||
119 | ```sh | |
120 | $ ls -1 | |
121 | repo_A | |
122 | repo_B | |
123 | $ cd repo_B | |
124 | $ git remote add repo_A ../repo_A | |
125 | $ git fetch repo_A --tags | |
126 | $ git merge --allow-unrelated-histories repo_A/$BRANCH | |
127 | $ git remote remove repo_A | |
128 | ``` |