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Diffstat (limited to 'runtime/plugin/gzip.vim')
| -rw-r--r-- | runtime/plugin/gzip.vim | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/runtime/plugin/gzip.vim b/runtime/plugin/gzip.vim new file mode 100644 index 000000000..39b0cbc36 --- /dev/null +++ b/runtime/plugin/gzip.vim @@ -0,0 +1,157 @@ +" Vim plugin for editing compressed files. +" Maintainer: Bram Moolenaar <Bram@vim.org> +" Last Change: 2004 Jan 12 + +" Exit quickly when: +" - this plugin was already loaded +" - when 'compatible' is set +" - some autocommands are already taking care of compressed files +if exists("loaded_gzip") || &cp || exists("#BufReadPre#*.gz") + finish +endif +let loaded_gzip = 1 + +augroup gzip + " Remove all gzip autocommands + au! + + " Enable editing of gzipped files + " set binary mode before reading the file + " use "gzip -d", gunzip isn't always available + autocmd BufReadPre,FileReadPre *.gz,*.bz2,*.Z setlocal bin + autocmd BufReadPost,FileReadPost *.gz call s:read("gzip -dn") + autocmd BufReadPost,FileReadPost *.bz2 call s:read("bzip2 -d") + autocmd BufReadPost,FileReadPost *.Z call s:read("uncompress") + autocmd BufWritePost,FileWritePost *.gz call s:write("gzip") + autocmd BufWritePost,FileWritePost *.bz2 call s:write("bzip2") + autocmd BufWritePost,FileWritePost *.Z call s:write("compress -f") + autocmd FileAppendPre *.gz call s:appre("gzip -dn") + autocmd FileAppendPre *.bz2 call s:appre("bzip2 -d") + autocmd FileAppendPre *.Z call s:appre("uncompress") + autocmd FileAppendPost *.gz call s:write("gzip") + autocmd FileAppendPost *.bz2 call s:write("bzip2") + autocmd FileAppendPost *.Z call s:write("compress -f") +augroup END + +" Function to check that executing "cmd [-f]" works. +" The result is cached in s:have_"cmd" for speed. +fun s:check(cmd) + let name = substitute(a:cmd, '\(\S*\).*', '\1', '') + if !exists("s:have_" . name) + let e = executable(name) + if e < 0 + let r = system(name . " --version") + let e = (r !~ "not found" && r != "") + endif + exe "let s:have_" . name . "=" . e + endif + exe "return s:have_" . name +endfun + +" After reading compressed file: Uncompress text in buffer with "cmd" +fun s:read(cmd) + " don't do anything if the cmd is not supported + if !s:check(a:cmd) + return + endif + " make 'patchmode' empty, we don't want a copy of the written file + let pm_save = &pm + set pm= + " remove 'a' and 'A' from 'cpo' to avoid the alternate file changes + let cpo_save = &cpo + set cpo-=a cpo-=A + " set 'modifiable' + let ma_save = &ma + setlocal ma + " when filtering the whole buffer, it will become empty + let empty = line("'[") == 1 && line("']") == line("$") + let tmp = tempname() + let tmpe = tmp . "." . expand("<afile>:e") + " write the just read lines to a temp file "'[,']w tmp.gz" + execute "silent '[,']w " . tmpe + " uncompress the temp file: call system("gzip -dn tmp.gz") + call system(a:cmd . " " . tmpe) + " delete the compressed lines; remember the line number + let l = line("'[") - 1 + if exists(":lockmarks") + lockmarks '[,']d _ + else + '[,']d _ + endif + " read in the uncompressed lines "'[-1r tmp" + setlocal nobin + if exists(":lockmarks") + execute "silent lockmarks " . l . "r " . tmp + else + execute "silent " . l . "r " . tmp + endif + + " if buffer became empty, delete trailing blank line + if empty + silent $delete _ + 1 + endif + " delete the temp file and the used buffers + call delete(tmp) + silent! exe "bwipe " . tmp + silent! exe "bwipe " . tmpe + let &pm = pm_save + let &cpo = cpo_save + let &l:ma = ma_save + " When uncompressed the whole buffer, do autocommands + if empty + if &verbose >= 8 + execute "doau BufReadPost " . expand("%:r") + else + execute "silent! doau BufReadPost " . expand("%:r") + endif + endif +endfun + +" After writing compressed file: Compress written file with "cmd" +fun s:write(cmd) + " don't do anything if the cmd is not supported + if s:check(a:cmd) + " Rename the file before compressing it. + let nm = expand("<afile>") + let nmt = s:tempname(nm) + if rename(nm, nmt) == 0 + call system(a:cmd . " " . nmt) + call rename(nmt . "." . expand("<afile>:e"), nm) + endif + endif +endfun + +" Before appending to compressed file: Uncompress file with "cmd" +fun s:appre(cmd) + " don't do anything if the cmd is not supported + if s:check(a:cmd) + " Rename to a weird name to avoid the risk of overwriting another file + let nm = expand("<afile>") + let nmt = expand("<afile>:p:h") . "/X~=@l9q5" + let nmte = nmt . "." . expand("<afile>:e") + if rename(nm, nmte) == 0 + if &patchmode != "" && getfsize(nm . &patchmode) == -1 + " Create patchmode file by creating the decompressed file new + call system(a:cmd . " -c " . nmte . " > " . nmt) + call rename(nmte, nm . &patchmode) + else + call system(a:cmd . " " . nmte) + endif + call rename(nmt, nm) + endif + endif +endfun + +" find a file name for the file to be compressed. Use "name" without an +" extension if possible. Otherwise use a weird name to avoid overwriting an +" existing file. +fun s:tempname(name) + let fn = fnamemodify(a:name, ":r") + if !filereadable(fn) && !isdirectory(fn) + return fn + endif + return fnamemodify(a:name, ":p:h") . "/X~=@l9q5" +endfun + +" vim: set sw=2 : |