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Respect 'splitbelow' on :Gdiffsplit with argument

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When calling :Gdiffsplit with no argument, we always end up with the
work tree version as half of the diff, and it is helpful to position
that consistently.  I generalized this to a consistent older versus
newer ordering when given an argument, but I don't think that has proven
very useful in practice.

This also introduces a minor behavior change where calling the bang
variant in the initial commit now loads an empty version of the buffer,
rather than falling back to the work tree.
This commit is contained in:
Tim Pope
2021-08-28 08:34:40 -04:00
parent 4603d77424
commit d523feebe9
2 changed files with 13 additions and 34 deletions
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38
autoload/fugitive.vim
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@@ -6116,28 +6116,6 @@ function! s:diffoff_all(dir) abort
diffoff!
endfunction
function! s:CompareAge(mine, theirs) abort
let scores = {':0': 1, ':1': 2, ':2': 3, ':': 4, ':3': 5}
let mine = substitute(a:mine, '^:', '', '')
let theirs = substitute(a:theirs, '^:', '', '')
let my_score = get(scores, ':'.mine, 0)
let their_score = get(scores, ':'.theirs, 0)
if my_score || their_score
return my_score < their_score ? -1 : my_score != their_score
elseif mine ==# theirs
return 0
endif
let base = s:TreeChomp('merge-base', mine, theirs)
if base ==# mine
return -1
elseif base ==# theirs
return 1
endif
let my_time = +s:TreeChomp('log', '--max-count=1', '--pretty=format:%at', a:mine, '--')
let their_time = +s:TreeChomp('log', '--max-count=1', '--pretty=format:%at', a:theirs, '--')
return my_time < their_time ? -1 : my_time != their_time
endfunction
function! s:IsConflicted() abort
return len(@%) && !empty(s:ChompDefault('', ['ls-files', '--unmerged', '--', expand('%:p')]))
endfunction
@@ -6218,7 +6196,7 @@ function! fugitive#Diffsplit(autodir, keepfocus, mods, arg, args) abort
let file = s:Relative()
elseif arg ==# ':'
exe s:DirCheck()
let file = s:Relative(':0:')
let file = len(commit) ? s:Relative() : s:Relative(s:IsConflicted() ? ':1:' : ':0:')
elseif arg =~# '^:\d$'
exe s:DirCheck()
let file = s:Relative(arg . ':')
@@ -6231,18 +6209,23 @@ function! fugitive#Diffsplit(autodir, keepfocus, mods, arg, args) abort
return 'echoerr ' . string(v:exception)
endtry
endif
elseif exists('parents') && len(parents)
let file = parents[-1]
let mods = s:Mods(a:mods)
elseif exists('parents')
let file = get(parents, -1, s:Relative(repeat('0', 40). ':'))
let mods = s:Mods(a:mods, 'leftabove')
elseif len(commit)
let file = s:Relative()
let mods = s:Mods(a:mods, 'rightbelow')
elseif s:IsConflicted()
let file = s:Relative(':1:')
let mods = s:Mods(a:mods, 'leftabove')
if get(g:, 'fugitive_legacy_commands', 1)
let post = 'echohl WarningMsg|echo "Use :Gdiffsplit! for 3 way diff"|echohl NONE|' . post
endif
else
exe s:DirCheck()
let file = s:Relative(':0:')
let mods = s:Mods(a:mods, 'leftabove')
endif
let spec = s:Generate(file)
if spec =~# '^fugitive:' && empty(s:DirCommitFile(spec)[2])
@@ -6251,11 +6234,6 @@ function! fugitive#Diffsplit(autodir, keepfocus, mods, arg, args) abort
exe pre
let restore = s:diff_restore()
let w:fugitive_diff_restore = restore
if len(spec) && s:CompareAge(commit, s:DirCommitFile(spec)[1]) < 0
let mods = s:Mods(mods, 'rightbelow')
else
let mods = s:Mods(mods, 'leftabove')
endif
let mods = (autodir ? s:diff_modifier(2) : '') . mods
if &diffopt =~# 'vertical'
let diffopt = &diffopt