Mercurial > vim-gutentags

annotate autoload/gutentags/ctags.vim @ 116:be8d47e88ab1

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ctags: use empty() instead of comparing with ""
author Ilya Tumaykin <itumaykin@gmail.com>
date Thu, 25 Feb 2016 02:02:03 +0300
parents bc6ef3d0b84f
children df3b0ca48013
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".
Ludovic Chabant <ludovic@chabant.com>
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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')
60
9e768b83d701 Fix missing renames of `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
62
106757c129cb Change the per-project option file to be `.gutctags` and process it first.
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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 let s:unix_redir = (&shellredir =~# '%s') ? &shellredir : &shellredir . ' %s'
41
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31
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32 function! gutentags#ctags#init(project_root) abort
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33 " Figure out the path to the tags file.
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34 let b:gutentags_files['ctags'] = gutentags#get_cachefile(
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35 \a:project_root, g:gutentags_tagfile)
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36
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37 " Set the tags file for Vim to use.
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38 if g:gutentags_auto_set_tags
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39 execute 'setlocal tags^=' . fnameescape(b:gutentags_files['ctags'])
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40 endif
93
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41
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42 " Check if the ctags executable exists.
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43 if g:gutentags_enabled && executable(g:gutentags_ctags_executable) == 0
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44 let g:gutentags_enabled = 0
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45 echoerr "Executable '".g:gutentags_ctags_executable."' can't be found. "
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46 \."Gutentags will be disabled. You can re-enable it by "
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47 \."setting g:gutentags_enabled back to 1."
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48 endif
41
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49 endfunction
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50
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51 function! gutentags#ctags#generate(proj_dir, tags_file, write_mode) abort
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52 " Get to the tags file directory because ctags is finicky about
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53 " these things.
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54 let l:prev_cwd = getcwd()
84
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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
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67 if empty(g:gutentags_cache_dir)
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68 " If we don't use the cache directory, let's just use the tag filename
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69 " as specified by the user, and change the working directory to the
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70 " project root.
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71 " Note that if we don't do this and pass a full path, `ctags` gets
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72 " confused if the paths have spaces -- but not if you're *in* the
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73 " root directory.
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74 let l:actual_proj_dir = '.'
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75 let l:actual_tags_file = g:gutentags_tagfile
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76 execute "chdir " . fnameescape(a:proj_dir)
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77 else
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78 " else: the tags file goes in a cache directory, so we need to specify
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79 " all the paths absolutely for `ctags` to do its job correctly.
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80 let l:actual_proj_dir = a:proj_dir
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81 let l:actual_tags_file = a:tags_file
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82 endif
41
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83
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84 try
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85 " Build the command line.
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86 let l:cmd = gutentags#get_execute_cmd() . s:runner_exe
89
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87 let l:cmd .= ' -e "' . s:get_ctags_executable(a:proj_dir) . '"'
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88 let l:cmd .= ' -t "' . l:actual_tags_file . '"'
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89 let l:cmd .= ' -p "' . l:actual_proj_dir . '"'
84
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90 if a:write_mode == 0 && l:tags_file_exists
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91 let l:full_path = expand('%:p')
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92 let l:cmd .= ' -s "' . l:full_path . '"'
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93 endif
75
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94 " Pass the Gutentags options file first, and then the project specific
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95 " one, so that users can override the default behaviour.
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96 let l:cmd .= ' -o "' . gutentags#get_res_file('ctags.options') . '"'
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97 let l:proj_options_file = a:proj_dir . '/' .
75
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98 \g:gutentags_ctags_options_file
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99 if filereadable(l:proj_options_file)
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100 let l:proj_options_file = s:process_options_file(
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101 \a:proj_dir, l:proj_options_file)
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102 let l:cmd .= ' -o "' . l:proj_options_file . '"'
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103 endif
41
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104 for ign in split(&wildignore, ',')
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105 let l:cmd .= ' -x ' . '"' . ign . '"'
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106 endfor
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107 for exc in g:gutentags_exclude
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108 let l:cmd .= ' -x ' . '"' . exc . '"'
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109 endfor
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110 if g:gutentags_pause_after_update
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111 let l:cmd .= ' -c'
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112 endif
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113 if g:gutentags_trace
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114 if has('win32')
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115 let l:cmd .= ' -l "' . l:actual_tags_file . '.log"'
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116 else
115
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117 let l:cmd .= ' ' . printf(s:unix_redir, '"' . l:actual_tags_file . '.log"')
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118 endif
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119 else
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120 if !has('win32')
115
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121 let l:cmd .= ' ' . printf(s:unix_redir, '/dev/null')
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122 endif
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123 endif
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124 let l:cmd .= gutentags#get_execute_cmd_suffix()
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125
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126 call gutentags#trace("Running: " . l:cmd)
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127 call gutentags#trace("In: " . getcwd())
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128 if !g:gutentags_fake
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129 " Run the background process.
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130 if !g:gutentags_trace
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131 silent execute l:cmd
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132 else
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133 execute l:cmd
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134 endif
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135
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136 " Flag this tags file as being in progress
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137 let l:full_tags_file = fnamemodify(a:tags_file, ':p')
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138 call gutentags#add_progress('ctags', l:full_tags_file)
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139 else
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140 call gutentags#trace("(fake... not actually running)")
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141 endif
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142 call gutentags#trace("")
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143 finally
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144 " Restore the previous working directory.
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145 execute "chdir " . fnameescape(l:prev_cwd)
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146 endtry
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147 endfunction
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148
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149 " }}}
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150
62
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151 " Utilities {{{
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152
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153 " Get final ctags executable depending whether a filetype one is defined
89
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154 function! s:get_ctags_executable(proj_dir) abort
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155 "Only consider the main filetype in cases like 'python.django'
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156 let l:ftype = get(split(&filetype, '\.'), 0, '')
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157 let l:proj_info = gutentags#get_project_info(a:proj_dir)
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158 let l:type = get(l:proj_info, 'type', l:ftype)
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159 if exists('g:gutentags_ctags_executable_{l:type}')
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160 return g:gutentags_ctags_executable_{l:type}
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161 else
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162 return g:gutentags_ctags_executable
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163 endif
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164 endfunction
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165
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166 function! s:process_options_file(proj_dir, path) abort
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167 if empty(g:gutentags_cache_dir)
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168 " If we're not using a cache directory to store tag files, we can
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169 " use the options file straight away.
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170 return a:path
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171 endif
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172
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173 " See if we need to process the options file.
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174 let l:do_process = 0
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175 let l:proj_dir = gutentags#stripslash(a:proj_dir)
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176 let l:out_path = gutentags#get_cachefile(l:proj_dir, 'options')
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177 if !filereadable(l:out_path)
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178 call gutentags#trace("Processing options file '".a:path."' because ".
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179 \"it hasn't been processed yet.")
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180 let l:do_process = 1
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181 elseif getftime(a:path) > getftime(l:out_path)
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182 call gutentags#trace("Processing options file '".a:path."' because ".
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183 \"it has changed.")
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184 let l:do_process = 1
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185 endif
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186 if l:do_process == 0
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187 " Nothing's changed, return the existing processed version of the
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188 " options file.
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189 return l:out_path
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190 endif
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191
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192 " We have to process the options file. Right now this only means capturing
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193 " all the 'exclude' rules, and rewrite them to make them absolute.
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194 "
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195 " This is because since `ctags` is run with absolute paths (because we
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196 " want the tag file to be in a cache directory), it will do its path
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197 " matching with absolute paths too, so the exclude rules need to be
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198 " absolute.
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199 let l:lines = readfile(a:path)
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200 let l:outlines = []
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201 for line in l:lines
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202 let l:exarg = matchend(line, '\v^\-\-exclude=')
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203 if l:exarg < 0
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204 call add(l:outlines, line)
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205 continue
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206 endif
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207 let l:fullp = gutentags#normalizepath(l:proj_dir.'/'.
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208 \strpart(line, l:exarg + 1))
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209 let l:ol = '--exclude='.l:fullp
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210 call add(l:outlines, l:ol)
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211 endfor
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212
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213 call writefile(l:outlines, l:out_path)
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214 return l:out_path
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215 endfunction
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216
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217 " }}}