mirror of
https://github.com/airblade/vim-gitgutter.git
synced 2025-11-08 19:43:47 -05:00
d59ac0394a
Not all versions of grep support the --color flag. This checks the output of grep --help when building the grep command and avoids using flags that aren't compatible with the version present. Fixes #234.
242 lines
7.8 KiB
VimL
242 lines
7.8 KiB
VimL
let s:grep_available = executable('grep')
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if s:grep_available
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let s:grep_command = ' | '.(g:gitgutter_escape_grep ? '\grep' : 'grep')
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let s:grep_help = gitgutter#utility#system('grep --help')
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if s:grep_help =~# '--color'
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let s:grep_command .= ' --color=never'
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endif
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let s:grep_command .= ' -e '.gitgutter#utility#shellescape('^@@ ')
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endif
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let s:hunk_re = '^@@ -\(\d\+\),\?\(\d*\) +\(\d\+\),\?\(\d*\) @@'
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function! gitgutter#diff#run_diff(realtime, use_external_grep, lines_of_context)
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" Wrap compound commands in parentheses to make Windows happy.
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let cmd = '('
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let bufnr = gitgutter#utility#bufnr()
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let tracked = getbufvar(bufnr, 'gitgutter_tracked') " i.e. tracked by git
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if !tracked
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let cmd .= 'git ls-files --error-unmatch '.gitgutter#utility#shellescape(gitgutter#utility#filename()).' && ('
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endif
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if a:realtime
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let blob_name = ':'.gitgutter#utility#shellescape(gitgutter#utility#file_relative_to_repo_root())
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let blob_file = tempname()
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let buff_file = tempname()
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let extension = gitgutter#utility#extension()
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if !empty(extension)
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let blob_file .= '.'.extension
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let buff_file .= '.'.extension
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endif
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let cmd .= 'git show '.blob_name.' > '.blob_file.' && '
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execute 'silent write' buff_file
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endif
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let cmd .= 'git diff --no-ext-diff --no-color -U'.a:lines_of_context.' '.g:gitgutter_diff_args.' -- '
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if a:realtime
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let cmd .= blob_file.' '.buff_file
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else
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let cmd .= gitgutter#utility#shellescape(gitgutter#utility#filename())
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endif
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if a:use_external_grep && s:grep_available
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let cmd .= s:grep_command
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endif
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if (a:use_external_grep && s:grep_available) || a:realtime
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" grep exits with 1 when no matches are found; diff exits with 1 when
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" differences are found. However we want to treat non-matches and
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" differences as non-erroneous behaviour; so we OR the command with one
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" which always exits with success (0).
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let cmd.= ' || exit 0'
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endif
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let cmd .= ')'
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if !tracked
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let cmd .= ')'
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endif
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let diff = gitgutter#utility#system(gitgutter#utility#command_in_directory_of_file(cmd))
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if a:realtime
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call delete(blob_file)
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call delete(buff_file)
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endif
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if gitgutter#utility#shell_error()
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" A shell error indicates the file is not tracked by git (unless something bizarre is going on).
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throw 'diff failed'
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endif
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if !tracked
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call setbufvar(bufnr, 'gitgutter_tracked', 1)
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endif
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return diff
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endfunction
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function! gitgutter#diff#parse_diff(diff)
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let hunks = []
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for line in split(a:diff, '\n')
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let hunk_info = gitgutter#diff#parse_hunk(line)
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if len(hunk_info) == 4
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call add(hunks, hunk_info)
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endif
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endfor
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return hunks
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endfunction
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function! gitgutter#diff#parse_hunk(line)
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let matches = matchlist(a:line, s:hunk_re)
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if len(matches) > 0
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let from_line = str2nr(matches[1])
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let from_count = (matches[2] == '') ? 1 : str2nr(matches[2])
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let to_line = str2nr(matches[3])
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let to_count = (matches[4] == '') ? 1 : str2nr(matches[4])
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return [from_line, from_count, to_line, to_count]
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else
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return []
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end
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endfunction
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function! gitgutter#diff#process_hunks(hunks)
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call gitgutter#hunk#reset()
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let modified_lines = []
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for hunk in a:hunks
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call extend(modified_lines, gitgutter#diff#process_hunk(hunk))
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endfor
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return modified_lines
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endfunction
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" Returns [ [<line_number (number)>, <name (string)>], ...]
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function! gitgutter#diff#process_hunk(hunk)
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let modifications = []
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let from_line = a:hunk[0]
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let from_count = a:hunk[1]
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let to_line = a:hunk[2]
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let to_count = a:hunk[3]
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if gitgutter#diff#is_added(from_count, to_count)
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call gitgutter#diff#process_added(modifications, from_count, to_count, to_line)
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call gitgutter#hunk#increment_lines_added(to_count)
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elseif gitgutter#diff#is_removed(from_count, to_count)
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call gitgutter#diff#process_removed(modifications, from_count, to_count, to_line)
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call gitgutter#hunk#increment_lines_removed(from_count)
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elseif gitgutter#diff#is_modified(from_count, to_count)
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call gitgutter#diff#process_modified(modifications, from_count, to_count, to_line)
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call gitgutter#hunk#increment_lines_modified(to_count)
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elseif gitgutter#diff#is_modified_and_added(from_count, to_count)
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call gitgutter#diff#process_modified_and_added(modifications, from_count, to_count, to_line)
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call gitgutter#hunk#increment_lines_added(to_count - from_count)
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call gitgutter#hunk#increment_lines_modified(from_count)
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elseif gitgutter#diff#is_modified_and_removed(from_count, to_count)
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call gitgutter#diff#process_modified_and_removed(modifications, from_count, to_count, to_line)
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call gitgutter#hunk#increment_lines_modified(to_count)
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call gitgutter#hunk#increment_lines_removed(from_count - to_count)
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endif
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return modifications
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endfunction
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function! gitgutter#diff#is_added(from_count, to_count)
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return a:from_count == 0 && a:to_count > 0
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endfunction
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function! gitgutter#diff#is_removed(from_count, to_count)
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return a:from_count > 0 && a:to_count == 0
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endfunction
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function! gitgutter#diff#is_modified(from_count, to_count)
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return a:from_count > 0 && a:to_count > 0 && a:from_count == a:to_count
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endfunction
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function! gitgutter#diff#is_modified_and_added(from_count, to_count)
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return a:from_count > 0 && a:to_count > 0 && a:from_count < a:to_count
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endfunction
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function! gitgutter#diff#is_modified_and_removed(from_count, to_count)
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return a:from_count > 0 && a:to_count > 0 && a:from_count > a:to_count
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endfunction
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function! gitgutter#diff#process_added(modifications, from_count, to_count, to_line)
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let offset = 0
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while offset < a:to_count
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let line_number = a:to_line + offset
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call add(a:modifications, [line_number, 'added'])
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let offset += 1
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endwhile
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endfunction
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function! gitgutter#diff#process_removed(modifications, from_count, to_count, to_line)
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if a:to_line == 0
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call add(a:modifications, [1, 'removed_first_line'])
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else
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call add(a:modifications, [a:to_line, 'removed'])
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endif
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endfunction
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function! gitgutter#diff#process_modified(modifications, from_count, to_count, to_line)
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let offset = 0
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while offset < a:to_count
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let line_number = a:to_line + offset
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call add(a:modifications, [line_number, 'modified'])
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let offset += 1
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endwhile
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endfunction
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function! gitgutter#diff#process_modified_and_added(modifications, from_count, to_count, to_line)
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let offset = 0
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while offset < a:from_count
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let line_number = a:to_line + offset
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call add(a:modifications, [line_number, 'modified'])
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let offset += 1
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endwhile
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while offset < a:to_count
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let line_number = a:to_line + offset
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call add(a:modifications, [line_number, 'added'])
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let offset += 1
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endwhile
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endfunction
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function! gitgutter#diff#process_modified_and_removed(modifications, from_count, to_count, to_line)
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let offset = 0
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while offset < a:to_count
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let line_number = a:to_line + offset
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call add(a:modifications, [line_number, 'modified'])
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let offset += 1
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endwhile
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let a:modifications[-1] = [a:to_line + offset - 1, 'modified_removed']
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endfunction
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function! gitgutter#diff#generate_diff_for_hunk(keep_header, lines_of_context)
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let diff = gitgutter#diff#run_diff(0, 0, a:lines_of_context)
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let diff_for_hunk = gitgutter#diff#discard_hunks(diff, a:keep_header)
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if !a:keep_header
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" Discard summary line
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let diff_for_hunk = join(split(diff_for_hunk, '\n')[1:-1], "\n")
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endif
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return diff_for_hunk
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endfunction
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" diff - with non-zero lines of context
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function! gitgutter#diff#discard_hunks(diff, keep_header)
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let modified_diff = []
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let keep_line = a:keep_header
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for line in split(a:diff, '\n')
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let hunk_info = gitgutter#diff#parse_hunk(line)
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if len(hunk_info) == 4 " start of new hunk
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let keep_line = gitgutter#hunk#cursor_in_hunk(hunk_info)
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endif
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if keep_line
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call add(modified_diff, line)
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endif
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endfor
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return join(modified_diff, "\n") . "\n"
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endfunction
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