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5618
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1 " netrw_gitignore#Hide: gitignore-based hiding
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2 " Function returns a string of comma separated patterns convenient for
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3 " assignment to `g:netrw_list_hide` option.
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4 " Function can take additional filenames as arguments, example:
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5 " netrw_gitignore#Hide('custom_gitignore1', 'custom_gitignore2')
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6 "
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7 " Usage examples:
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8 " let g:netrw_list_hide = netrw_gitignore#Hide()
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9 " let g:netrw_list_hide = netrw_gitignore#Hide() . 'more,hide,patterns'
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10 "
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11 " Copyright: Copyright (C) 2013 Bruno Sutic {{{1
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12 " Permission is hereby granted to use and distribute this code,
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13 " with or without modifications, provided that this copyright
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14 " notice is copied with it. Like anything else that's free,
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15 " netrw_gitignore.vim is provided *as is* and comes with no
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16 " warranty of any kind, either expressed or implied. By using
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17 " this plugin, you agree that in no event will the copyright
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18 " holder be liable for any damages resulting from the use
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19 " of this software.
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20 function! netrw_gitignore#Hide(...)
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21 let additional_files = a:000
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22
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23 let default_files = ['.gitignore', '.git/info/exclude']
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24
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25 " get existing global/system gitignore files
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26 let global_gitignore = expand(substitute(system("git config --global core.excludesfile"), '\n', '', 'g'))
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27 if global_gitignore !=# ''
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28 let default_files = add(default_files, global_gitignore)
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29 endif
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30 let system_gitignore = expand(substitute(system("git config --system core.excludesfile"), '\n', '', 'g'))
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31 if system_gitignore !=# ''
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32 let default_files = add(default_files, system_gitignore)
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33 endif
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34
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35 " append additional files if given as function arguments
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36 if additional_files !=# []
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37 let files = extend(default_files, additional_files)
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38 else
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39 let files = default_files
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40 endif
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41
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42 " keep only existing/readable files
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43 let gitignore_files = []
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44 for file in files
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45 if filereadable(file)
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46 let gitignore_files = add(gitignore_files, file)
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47 endif
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48 endfor
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49
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50 " get contents of gitignore patterns from those files
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51 let gitignore_lines = []
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52 for file in gitignore_files
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53 for line in readfile(file)
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54 " filter empty lines and comments
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55 if line !~# '^#' && line !~# '^$'
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56 let gitignore_lines = add(gitignore_lines, line)
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57 endif
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58 endfor
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59 endfor
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60
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61 " convert gitignore patterns to Netrw/Vim regex patterns
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62 let escaped_lines = []
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63 for line in gitignore_lines
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6476
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64 let escaped = line
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65 let escaped = substitute(escaped, '\*\*', '*', 'g')
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66 let escaped = substitute(escaped, '\.', '\\.', 'g')
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67 let escaped = substitute(escaped, '\$', '\\$', 'g')
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68 let escaped = substitute(escaped, '*', '.*', 'g')
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69 " correction: dot, dollar and asterisks chars shouldn't be escaped when
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70 " within regex matching groups.
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71 let escaped = substitute(escaped, '\(\[[^]]*\)\zs\\\.', '\.', 'g')
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72 let escaped = substitute(escaped, '\(\[[^]]*\)\zs\\\$', '\$', 'g')
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73 let escaped = substitute(escaped, '\(\[[^]]*\)\zs\.\*', '*', 'g')
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5618
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74 let escaped_lines = add(escaped_lines, escaped)
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75 endfor
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76
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77 return join(escaped_lines, ',')
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78 endfunction
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