Mercurial > vim-gutentags

annotate autoload/gutentags/ctags.vim @ 84:96bfe5c37f37

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Error and abort if we'll be overwriting a non-ctags file.
author Ludovic Chabant <ludovic@chabant.com>
date Wed, 26 Aug 2015 22:21:19 -0700
parents d12543f11eb9
children 7872cc9bbc2d
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
41
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21 " }}}
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22
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23 " Gutentags Module Interface {{{
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24
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25 let s:runner_exe = gutentags#get_plat_file('update_tags')
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26
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27 function! gutentags#ctags#init(project_root) abort
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28 " Figure out the path to the tags file.
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29 let b:gutentags_files['ctags'] = gutentags#get_cachefile(
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30 \a:project_root, g:gutentags_tagfile)
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31
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32 " Set the tags file for Vim to use.
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33 if g:gutentags_auto_set_tags
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34 execute 'setlocal tags^=' . fnameescape(b:gutentags_files['ctags'])
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35 endif
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36 endfunction
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37
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38 function! gutentags#ctags#generate(proj_dir, tags_file, write_mode) abort
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39 " Get to the tags file directory because ctags is finicky about
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40 " these things.
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41 let l:prev_cwd = getcwd()
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42 let l:work_dir = fnamemodify(a:tags_file, ':h')
84
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43 let l:tags_file_exists = filereadable(a:tags_file)
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44
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45 if l:tags_file_exists
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46 let l:first_lines = readfile(a:tags_file, '', 1)
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47 if len(l:first_lines) == 0 || stridx(l:first_lines[0], '!_TAG_') != 0
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48 call gutentags#throw("File ".a:tags_file." doesn't appear to be ".
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49 \"a ctags file. Please delete it and run ".
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50 \":GutentagsUpdate!.")
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51 return
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52 endif
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53 endif
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54
41
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55 execute "chdir " . fnameescape(l:work_dir)
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56
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57 try
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58 " Build the command line.
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59 let l:cmd = gutentags#get_execute_cmd() . s:runner_exe
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60 let l:cmd .= ' -e "' . s:get_ctags_executable() . '"'
41
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61 let l:cmd .= ' -t "' . a:tags_file . '"'
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62 let l:cmd .= ' -p "' . a:proj_dir . '"'
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63 if a:write_mode == 0 && l:tags_file_exists
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64 let l:full_path = expand('%:p')
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65 let l:cmd .= ' -s "' . l:full_path . '"'
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66 endif
75
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67 " Pass the Gutentags options file first, and then the project specific
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68 " one, so that users can override the default behaviour.
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69 let l:cmd .= ' -o "' . gutentags#get_res_file('ctags.options') . '"'
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70 let l:proj_options_file = a:proj_dir . '/' .
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71 \g:gutentags_ctags_options_file
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72 if filereadable(l:proj_options_file)
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73 let l:proj_options_file = s:process_options_file(
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74 \a:proj_dir, l:proj_options_file)
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75 let l:cmd .= ' -o "' . l:proj_options_file . '"'
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76 endif
41
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77 for ign in split(&wildignore, ',')
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78 let l:cmd .= ' -x ' . '"' . ign . '"'
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79 endfor
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80 for exc in g:gutentags_exclude
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81 let l:cmd .= ' -x ' . '"' . exc . '"'
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82 endfor
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83 if g:gutentags_pause_after_update
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84 let l:cmd .= ' -c'
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85 endif
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86 if g:gutentags_trace
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87 if has('win32')
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88 let l:cmd .= ' -l "' . a:tags_file . '.log"'
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89 else
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90 let l:cmd .= ' > "' . a:tags_file . '.log" 2>&1'
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91 endif
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92 else
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93 if !has('win32')
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94 let l:cmd .= ' > /dev/null 2>&1'
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95 endif
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96 endif
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97 let l:cmd .= gutentags#get_execute_cmd_suffix()
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98
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99 call gutentags#trace("Running: " . l:cmd)
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100 call gutentags#trace("In: " . getcwd())
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101 if !g:gutentags_fake
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102 " Run the background process.
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103 if !g:gutentags_trace
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104 silent execute l:cmd
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105 else
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106 execute l:cmd
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107 endif
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108
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109 " Flag this tags file as being in progress
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110 let l:full_tags_file = fnamemodify(a:tags_file, ':p')
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111 call gutentags#add_progress('ctags', l:full_tags_file)
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112 else
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113 call gutentags#trace("(fake... not actually running)")
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114 endif
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115 call gutentags#trace("")
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116 finally
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117 " Restore the previous working directory.
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118 execute "chdir " . fnameescape(l:prev_cwd)
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119 endtry
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120 endfunction
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121
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122 " }}}
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123
62
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124 " Utilities {{{
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125
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126 " Get final ctags executable depending whether a filetype one is defined
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127 function! s:get_ctags_executable() abort
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128 "Only consider the main filetype in cases like 'python.django'
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129 let l:ftype = get(split(&filetype, '\.'), 0, '')
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130 if exists('g:gutentags_ctags_executable_{l:ftype}')
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131 return g:gutentags_ctags_executable_{l:ftype}
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132 else
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133 return g:gutentags_ctags_executable
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134 endif
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135 endfunction
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136
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137 function! s:process_options_file(proj_dir, path) abort
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138 if g:gutentags_cache_dir == ""
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139 " If we're not using a cache directory to store tag files, we can
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140 " use the options file straight away.
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141 return a:path
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142 endif
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143
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144 " See if we need to process the options file.
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145 let l:do_process = 0
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146 let l:proj_dir = gutentags#stripslash(a:proj_dir)
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147 let l:out_path = gutentags#get_cachefile(l:proj_dir, 'options')
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148 if !filereadable(l:out_path)
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149 call gutentags#trace("Processing options file '".a:path."' because ".
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150 \"it hasn't been processed yet.")
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151 let l:do_process = 1
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152 elseif getftime(a:path) > getftime(l:out_path)
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153 call gutentags#trace("Processing options file '".a:path."' because ".
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154 \"it has changed.")
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155 let l:do_process = 1
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156 endif
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157 if l:do_process == 0
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158 " Nothing's changed, return the existing processed version of the
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159 " options file.
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160 return l:out_path
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161 endif
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162
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163 " We have to process the options file. Right now this only means capturing
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164 " all the 'exclude' rules, and rewrite them to make them absolute.
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165 "
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166 " This is because since `ctags` is run with absolute paths (because we
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167 " want the tag file to be in a cache directory), it will do its path
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168 " matching with absolute paths too, so the exclude rules need to be
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169 " absolute.
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170 let l:lines = readfile(a:path)
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171 let l:outlines = []
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172 for line in l:lines
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173 let l:exarg = matchend(line, '\v^\-\-exclude=')
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174 if l:exarg < 0
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175 call add(l:outlines, line)
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176 continue
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177 endif
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178 let l:fullp = gutentags#normalizepath(l:proj_dir.'/'.
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179 \strpart(line, l:exarg + 1))
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180 let l:ol = '--exclude='.l:fullp
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181 call add(l:outlines, l:ol)
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182 endfor
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183
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184 call writefile(l:outlines, l:out_path)
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185 return l:out_path
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186 endfunction
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187
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188 " }}}
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189