feat: make git diff algorithm configurable (#434)

Signed-off-by: Luis Davim <luis.davim@gmail.com>

Author: luisdavim

lua/vgit/git/git_hunks.lua

@@ -2,8 +2,9 @@ local fs = require('vgit.core.fs')
 local utils = require('vgit.core.utils')
 local gitcli = require('vgit.git.gitcli')
 local GitHunk = require('vgit.git.GitHunk')
+local git_setting = require('vgit.settings.git')
 
-local git_hunks = { algorithm = 'myers' }
+local git_hunks = {}
 
 function git_hunks.live(reponame, original_lines, current_lines)
   local lines_limit = 5000
@@ -57,7 +58,7 @@ function git_hunks.live(reponame, original_lines, current_lines)
 
       live_hunks[#live_hunks + 1] = hunk
     end,
-    algorithm = git_hunks.algorithm,
+    algorithm = git_setting:get('algorithm'),
   })
 
   return live_hunks
@@ -113,7 +114,7 @@ function git_hunks.list(reponame, opts)
     'core.safecrlf=false',
     'diff',
     '--color=never',
-    string.format('--diff-algorithm=%s', git_hunks.algorithm),
+    string.format('--diff-algorithm=%s', git_setting:get('algorithm')),
     '--patch-with-raw',
     '--unified=0',
   }

lua/vgit/git/gitcli.lua

@@ -1,11 +1,12 @@
 local loop = require('vgit.core.loop')
 local Spawn = require('vgit.core.Spawn')
 local console = require('vgit.core.console')
+local git_setting = require('vgit.settings.git')
 
 local gitcli = {}
 
 gitcli.run = loop.suspend(function(args, opts, callback)
-  local cmd = 'git'
+  local cmd = git_setting:get('cmd')
 
   opts = opts or {}
   local debug = opts.debug

lua/vgit/settings/git.lua

@@ -2,6 +2,7 @@ local Config = require('vgit.core.Config')
 
 return Config({
   cmd = 'git',
+  algorithm = 'myers',
   fallback_cwd = '',
   fallback_args = {},
 })