Mercurial > vim-gutentags

annotate autoload/gutentags/ctags.vim @ 93:edd488d8d37e

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Give some error message if there's no available `ctags` on the system.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 17 Feb 2016 23:30:24 -0800
parents 8bf96f9f649c
children e03a661dc983
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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41
99328cb71e75 Refactor Gutentags so functionality can be implemented in "modules".
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1 " Ctags module for Gutentags
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2
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3 " Global Options {{{
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4
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5 if !exists('g:gutentags_ctags_executable')
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6 let g:gutentags_ctags_executable = 'ctags'
41
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7 endif
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8
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9 if !exists('g:gutentags_tagfile')
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10 let g:gutentags_tagfile = 'tags'
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11 endif
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12
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13 if !exists('g:gutentags_auto_set_tags')
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14 let g:gutentags_auto_set_tags = 1
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15 endif
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16
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17 if !exists('g:gutentags_ctags_options_file')
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18 let g:gutentags_ctags_options_file = '.gutctags'
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19 endif
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20
86
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21 if !exists('g:gutentags_ctags_check_tagfile')
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22 let g:gutentags_ctags_check_tagfile = 0
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23 endif
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24
41
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25 " }}}
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26
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27 " Gutentags Module Interface {{{
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28
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29 let s:runner_exe = gutentags#get_plat_file('update_tags')
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30
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31 function! gutentags#ctags#init(project_root) abort
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32 " Figure out the path to the tags file.
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33 let b:gutentags_files['ctags'] = gutentags#get_cachefile(
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34 \a:project_root, g:gutentags_tagfile)
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35
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36 " Set the tags file for Vim to use.
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37 if g:gutentags_auto_set_tags
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38 execute 'setlocal tags^=' . fnameescape(b:gutentags_files['ctags'])
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39 endif
93
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40
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41 " Check if the ctags executable exists.
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42 if g:gutentags_enabled && executable(g:gutentags_ctags_executable) == 0
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43 let g:gutentags_enabled = 0
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44 echoerr "Executable '".g:gutentags_ctags_executable."' can't be found. "
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45 \."Gutentags will be disabled. You can re-enable it by "
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46 \."setting g:gutentags_enabled back to 1."
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47 endif
41
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48 endfunction
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49
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50 function! gutentags#ctags#generate(proj_dir, tags_file, write_mode) abort
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51 " Get to the tags file directory because ctags is finicky about
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52 " these things.
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53 let l:prev_cwd = getcwd()
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54 let l:work_dir = fnamemodify(a:tags_file, ':h')
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55 let l:tags_file_exists = filereadable(a:tags_file)
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56
86
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57 if l:tags_file_exists && g:gutentags_ctags_check_tagfile
84
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58 let l:first_lines = readfile(a:tags_file, '', 1)
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59 if len(l:first_lines) == 0 || stridx(l:first_lines[0], '!_TAG_') != 0
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60 call gutentags#throw("File ".a:tags_file." doesn't appear to be ".
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61 \"a ctags file. Please delete it and run ".
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62 \":GutentagsUpdate!.")
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63 return
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64 endif
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65 endif
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66
41
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67 execute "chdir " . fnameescape(l:work_dir)
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68
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69 try
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70 " Build the command line.
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71 let l:cmd = gutentags#get_execute_cmd() . s:runner_exe
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72 let l:cmd .= ' -e "' . s:get_ctags_executable(a:proj_dir) . '"'
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73 let l:cmd .= ' -t "' . a:tags_file . '"'
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74 let l:cmd .= ' -p "' . a:proj_dir . '"'
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75 if a:write_mode == 0 && l:tags_file_exists
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76 let l:full_path = expand('%:p')
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77 let l:cmd .= ' -s "' . l:full_path . '"'
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78 endif
75
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79 " Pass the Gutentags options file first, and then the project specific
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80 " one, so that users can override the default behaviour.
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81 let l:cmd .= ' -o "' . gutentags#get_res_file('ctags.options') . '"'
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82 let l:proj_options_file = a:proj_dir . '/' .
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83 \g:gutentags_ctags_options_file
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84 if filereadable(l:proj_options_file)
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85 let l:proj_options_file = s:process_options_file(
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86 \a:proj_dir, l:proj_options_file)
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87 let l:cmd .= ' -o "' . l:proj_options_file . '"'
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88 endif
41
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89 for ign in split(&wildignore, ',')
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90 let l:cmd .= ' -x ' . '"' . ign . '"'
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91 endfor
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92 for exc in g:gutentags_exclude
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93 let l:cmd .= ' -x ' . '"' . exc . '"'
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94 endfor
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95 if g:gutentags_pause_after_update
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96 let l:cmd .= ' -c'
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97 endif
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98 if g:gutentags_trace
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99 if has('win32')
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100 let l:cmd .= ' -l "' . a:tags_file . '.log"'
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101 else
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102 let l:cmd .= ' > "' . a:tags_file . '.log" 2>&1'
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103 endif
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104 else
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105 if !has('win32')
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106 let l:cmd .= ' > /dev/null 2>&1'
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107 endif
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108 endif
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109 let l:cmd .= gutentags#get_execute_cmd_suffix()
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110
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111 call gutentags#trace("Running: " . l:cmd)
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112 call gutentags#trace("In: " . getcwd())
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113 if !g:gutentags_fake
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114 " Run the background process.
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115 if !g:gutentags_trace
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116 silent execute l:cmd
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117 else
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118 execute l:cmd
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119 endif
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120
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121 " Flag this tags file as being in progress
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122 let l:full_tags_file = fnamemodify(a:tags_file, ':p')
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123 call gutentags#add_progress('ctags', l:full_tags_file)
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124 else
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125 call gutentags#trace("(fake... not actually running)")
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126 endif
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127 call gutentags#trace("")
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128 finally
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129 " Restore the previous working directory.
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130 execute "chdir " . fnameescape(l:prev_cwd)
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131 endtry
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132 endfunction
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133
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134 " }}}
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135
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136 " Utilities {{{
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137
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138 " Get final ctags executable depending whether a filetype one is defined
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139 function! s:get_ctags_executable(proj_dir) abort
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140 "Only consider the main filetype in cases like 'python.django'
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141 let l:ftype = get(split(&filetype, '\.'), 0, '')
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142 let l:proj_info = gutentags#get_project_info(a:proj_dir)
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143 let l:type = get(l:proj_info, 'type', l:ftype)
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144 if exists('g:gutentags_ctags_executable_{l:type}')
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145 return g:gutentags_ctags_executable_{l:type}
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146 else
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147 return g:gutentags_ctags_executable
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148 endif
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149 endfunction
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150
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151 function! s:process_options_file(proj_dir, path) abort
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152 if g:gutentags_cache_dir == ""
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153 " If we're not using a cache directory to store tag files, we can
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154 " use the options file straight away.
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155 return a:path
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156 endif
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157
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158 " See if we need to process the options file.
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159 let l:do_process = 0
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160 let l:proj_dir = gutentags#stripslash(a:proj_dir)
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161 let l:out_path = gutentags#get_cachefile(l:proj_dir, 'options')
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162 if !filereadable(l:out_path)
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163 call gutentags#trace("Processing options file '".a:path."' because ".
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164 \"it hasn't been processed yet.")
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165 let l:do_process = 1
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166 elseif getftime(a:path) > getftime(l:out_path)
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167 call gutentags#trace("Processing options file '".a:path."' because ".
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168 \"it has changed.")
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169 let l:do_process = 1
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170 endif
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171 if l:do_process == 0
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172 " Nothing's changed, return the existing processed version of the
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173 " options file.
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174 return l:out_path
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175 endif
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176
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177 " We have to process the options file. Right now this only means capturing
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178 " all the 'exclude' rules, and rewrite them to make them absolute.
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179 "
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180 " This is because since `ctags` is run with absolute paths (because we
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181 " want the tag file to be in a cache directory), it will do its path
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182 " matching with absolute paths too, so the exclude rules need to be
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183 " absolute.
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184 let l:lines = readfile(a:path)
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185 let l:outlines = []
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186 for line in l:lines
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187 let l:exarg = matchend(line, '\v^\-\-exclude=')
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188 if l:exarg < 0
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189 call add(l:outlines, line)
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190 continue
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191 endif
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192 let l:fullp = gutentags#normalizepath(l:proj_dir.'/'.
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193 \strpart(line, l:exarg + 1))
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194 let l:ol = '--exclude='.l:fullp
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195 call add(l:outlines, l:ol)
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196 endfor
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197
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198 call writefile(l:outlines, l:out_path)
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199 return l:out_path
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200 endfunction
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201
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202 " }}}
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203