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Vim Fugitive: Gblame reblame options

I recently used Fugitive Gblame, but I don’t quite understand what reblame does.

Can someone more clearly describe what these options do:

 -     reblame at commit
 ~     reblame at [count]th first grandparent
 P     reblame at [count]th parent (like HEAD^[count])
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Think about what you will rewrite as a commit, and then run the blame in your file or git blame <commit> -- <file>

  • -the simplest case. Use the command under your cursor and overwrite the file.
  • ~ This is equivalent to running git blame <rev>~[count] -- <file>
  • P This is equivalent to running git blame <rev>^[count] -- <file>

In the general case, i.e. no [count], ~and are Pequivalent. (Note that [count]the default is 1)

Quick revision guide from git help gitrevisions:

Here is an illustration, by Jon Loeliger.
Both commit nodes B and C are parents of commit node A.
Parent commits are ordered left-to-right.

G   H   I   J
 \ /     \ /
  D   E   F
   \  |  / \
    \ | /   |
     \|/    |
      B     C
       \   /
        \ /
         A
A =      = A^0
B = A^   = A^1     = A~1
C = A^2  = A^2
D = A^^  = A^1^1   = A~2
E = B^2  = A^^2
F = B^3  = A^^3
G = A^^^ = A^1^1^1 = A~3
H = D^2  = B^^2    = A^^^2  = A~2^2
I = F^   = B^3^    = A^^3^
J = F^2  = B^3^2   = A^^3^2

git . :

git blame . git help blame

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