diff options
| -rw-r--r-- | autoload/xolox/easytags.vim | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/autoload/xolox/easytags.vim b/autoload/xolox/easytags.vim index 2088f48..0d6e857 100644 --- a/autoload/xolox/easytags.vim +++ b/autoload/xolox/easytags.vim @@ -99,8 +99,11 @@ function! xolox#easytags#update(silent, filter_tags, filenames) " {{{2 let tagsfile = xolox#easytags#get_tagsfile() let firstrun = !filereadable(tagsfile) let cmdline = s:prep_cmdline(cfile, tagsfile, firstrun, a:filenames, context) - let output = s:run_ctags(starttime, cfile, tagsfile, firstrun, cmdline) + let [output, has_updates] = s:run_ctags(starttime, cfile, tagsfile, firstrun, cmdline) if !firstrun + if !has_updates + return 1 + endif if have_args && !empty(g:easytags_by_filetype) " TODO Get the headers from somewhere?! call s:save_by_filetype(a:filter_tags, [], output, context) @@ -201,12 +204,41 @@ function! s:prep_cmdline(cfile, tagsfile, firstrun, arguments, context) " {{{3 return have_args ? join(cmdline) : '' endfunction +if exists('*sha256') +function! s:get_fingerprint(cfile, output) + return sha256(a:output) +endfunction +else +function! s:get_fingerprint(cfile, output) + " Don't want to re-implement a costly hashing function in Vimscript. Just + " handle files that never had any tags. + if empty(a:output) + return get(s:fingerprints, a:cfile, 1) + else + return '' + endif +endfunction +endif + +let s:fingerprints = {} +function! s:has_updates(cfile, output) + let fingerprint = s:get_fingerprint(a:cfile, a:output) + if ! empty(fingerprint) && get(s:fingerprints, a:cfile, '') ==# fingerprint + return 0 + endif + + let s:fingerprints[a:cfile] = fingerprint + return 1 +endfunction + function! s:run_ctags(starttime, cfile, tagsfile, firstrun, cmdline) " {{{3 let lines = [] + let has_updates = 1 if a:cmdline != '' call xolox#misc#msg#debug("easytags.vim %s: Executing %s.", g:xolox#easytags#version, a:cmdline) try let lines = xolox#shell#execute(a:cmdline, 1) + let has_updates = a:firstrun || s:has_updates(a:cfile, join(lines, "\n")) catch /^Vim\%((\a\+)\)\=:E117/ " Ignore missing shell.vim plug-in. let output = system(a:cmdline) @@ -215,6 +247,7 @@ function! s:run_ctags(starttime, cfile, tagsfile, firstrun, cmdline) " {{{3 throw printf(msg, fnamemodify(a:tagsfile, ':~'), strtrans(output)) endif let lines = split(output, "\n") + let has_updates = a:firstrun || s:has_updates(a:cfile, output) endtry if a:firstrun if a:cfile != '' @@ -225,7 +258,7 @@ function! s:run_ctags(starttime, cfile, tagsfile, firstrun, cmdline) " {{{3 return [] endif endif - return xolox#easytags#parse_entries(lines) + return [xolox#easytags#parse_entries(lines), has_updates] endfunction function! s:filter_merge_tags(filter_tags, tagsfile, output, context) " {{{3 |