278 lines
9.7 KiB
VimL
Executable file
278 lines
9.7 KiB
VimL
Executable file
" Pathname manipulation functions.
|
|
"
|
|
" Author: Peter Odding <peter@peterodding.com>
|
|
" Last Change: July 7, 2014
|
|
" URL: http://peterodding.com/code/vim/misc/
|
|
|
|
let s:windows_compatible = xolox#misc#os#is_win()
|
|
|
|
function! xolox#misc#path#which(...) " {{{1
|
|
" Scan the executable search path (`$PATH`) for one or more external
|
|
" programs. Expects one or more string arguments with program names. Returns
|
|
" a list with the absolute pathnames of all found programs. Here's an
|
|
" example:
|
|
"
|
|
" :echo xolox#misc#path#which('gvim', 'vim')
|
|
" ['/usr/local/bin/gvim',
|
|
" '/usr/bin/gvim',
|
|
" '/usr/local/bin/vim',
|
|
" '/usr/bin/vim']
|
|
let extensions = s:windows_compatible ? split($PATHEXT, ';') : ['']
|
|
let matches = []
|
|
let checked = {}
|
|
for program in a:000
|
|
for directory in split($PATH, s:windows_compatible ? ';' : ':')
|
|
let directory = xolox#misc#path#absolute(directory)
|
|
if isdirectory(directory)
|
|
let found = 0
|
|
for extension in extensions
|
|
let path = xolox#misc#path#merge(directory, program . extension)
|
|
if executable(path)
|
|
call add(matches, path)
|
|
let found = 1
|
|
endif
|
|
endfor
|
|
if s:windows_compatible && ! found
|
|
" Maybe the extension is already contained in program; try without
|
|
" $PATHEXT.
|
|
let path = xolox#misc#path#merge(directory, program)
|
|
if executable(path)
|
|
call add(matches, path)
|
|
endif
|
|
endif
|
|
endif
|
|
endfor
|
|
endfor
|
|
return xolox#misc#list#unique(matches)
|
|
endfunction
|
|
|
|
function! xolox#misc#path#split(path) " {{{1
|
|
" Split a pathname (the first and only argument) into a list of pathname
|
|
" components.
|
|
"
|
|
" On Windows, pathnames starting with two slashes or backslashes are UNC
|
|
" paths where the leading slashes are significant... In this case we split
|
|
" like this:
|
|
"
|
|
" - Input: `'//server/share/directory'`
|
|
" - Result: `['//server', 'share', 'directory']`
|
|
"
|
|
" Everything except Windows is treated like UNIX until someone has a better
|
|
" suggestion :-). In this case we split like this:
|
|
"
|
|
" - Input: `'/foo/bar/baz'`
|
|
" - Result: `['/', 'foo', 'bar', 'baz']`
|
|
"
|
|
" To join a list of pathname components back into a single pathname string,
|
|
" use the `xolox#misc#path#join()` function.
|
|
if type(a:path) == type('')
|
|
if s:windows_compatible
|
|
if a:path =~ '^[\/][\/]'
|
|
" UNC pathname.
|
|
return split(a:path, '\%>2c[\/]\+')
|
|
else
|
|
" If it's not a UNC pathname we can simply split on slashes and
|
|
" backslashes, although we should preserve a leading slash (which
|
|
" denotes a pathname that is 'absolute to the current drive').
|
|
let absolute = (a:path =~ '^[\/]')
|
|
let segments = split(a:path, '[\/]\+')
|
|
return absolute ? insert(segments, a:path[0]) : segments
|
|
endif
|
|
else
|
|
" Everything else is treated as UNIX.
|
|
let absolute = (a:path =~ '^/')
|
|
let segments = split(a:path, '/\+')
|
|
return absolute ? insert(segments, '/') : segments
|
|
endif
|
|
endif
|
|
return []
|
|
endfunction
|
|
|
|
function! xolox#misc#path#join(parts) " {{{1
|
|
" Join a list of pathname components (the first and only argument) into a
|
|
" single pathname string. This is the counterpart to the
|
|
" `xolox#misc#path#split()` function and it expects a list of pathname
|
|
" components as returned by `xolox#misc#path#split()`.
|
|
if type(a:parts) == type([])
|
|
if s:windows_compatible
|
|
return join(a:parts, xolox#misc#path#directory_separator())
|
|
elseif get(a:parts, 0) == '/'
|
|
" Absolute path on UNIX (non-Windows).
|
|
return '/' . join(a:parts[1:], '/')
|
|
else
|
|
" Relative path on UNIX (non-Windows).
|
|
return join(a:parts, '/')
|
|
endif
|
|
endif
|
|
return ''
|
|
endfunction
|
|
|
|
function! xolox#misc#path#directory_separator() " {{{1
|
|
" Find the preferred directory separator for the platform and settings.
|
|
return exists('+shellslash') && &shellslash ? '/' : '\'
|
|
endfunction
|
|
|
|
function! xolox#misc#path#absolute(path) " {{{1
|
|
" Canonicalize and resolve a pathname, *regardless of whether it exists*.
|
|
" This is intended to support string comparison to determine whether two
|
|
" pathnames point to the same directory or file.
|
|
if type(a:path) == type('')
|
|
let path = a:path
|
|
" Make the pathname absolute.
|
|
if path =~ '^\~'
|
|
" Expand ~ to $HOME.
|
|
let path = $HOME . '/' . path[1:]
|
|
elseif xolox#misc#path#is_relative(path)
|
|
" Make relative pathnames absolute.
|
|
let path = getcwd() . '/' . path
|
|
endif
|
|
" Resolve symbolic links to find the canonical pathname. In my tests this
|
|
" also removes all symbolic pathname segments (`.' and `..'), even when
|
|
" the pathname does not exist. Also there used to be a bug in resolve()
|
|
" where it wouldn't resolve pathnames ending in a directory separator.
|
|
" Since it's not much trouble to work around, that's what we do.
|
|
let path = resolve(substitute(path, s:windows_compatible ? '[\/]\+$' : '/\+$', '', ''))
|
|
" Normalize directory separators (especially relevant on Windows).
|
|
let parts = xolox#misc#path#split(path)
|
|
if s:windows_compatible && parts[0] =~ '^[\/][\/]'
|
|
" Also normalize the two leading "directory separators" (I'm not
|
|
" sure what else to call them :-) in Windows UNC pathnames.
|
|
let parts[0] = repeat(xolox#misc#path#directory_separator(), 2) . parts[0][2:]
|
|
elseif s:windows_compatible && parts[0] =~ '^[\/]$'
|
|
" If a pathname is relative to the current drive we should add
|
|
" the drive letter in order to make the pathname absolute.
|
|
let parts[0] = matchstr(getcwd(), '^\a:')
|
|
endif
|
|
return xolox#misc#path#join(parts)
|
|
endif
|
|
return ''
|
|
endfunction
|
|
|
|
function! xolox#misc#path#relative(path, base) " {{{1
|
|
" Make an absolute pathname (the first argument) relative to a directory
|
|
" (the second argument).
|
|
let path = xolox#misc#path#split(a:path)
|
|
let base = xolox#misc#path#split(a:base)
|
|
while path != [] && base != [] && path[0] == base[0]
|
|
call remove(path, 0)
|
|
call remove(base, 0)
|
|
endwhile
|
|
let distance = repeat(['..'], len(base))
|
|
return xolox#misc#path#join(distance + path)
|
|
endfunction
|
|
|
|
function! xolox#misc#path#merge(parent, child, ...) " {{{1
|
|
" Join a directory pathname and filename into a single pathname.
|
|
if type(a:parent) == type('') && type(a:child) == type('')
|
|
" TODO Use xolox#misc#path#is_relative()?
|
|
if s:windows_compatible
|
|
let parent = substitute(a:parent, '[\\/]\+$', '', '')
|
|
let child = substitute(a:child, '^[\\/]\+', '', '')
|
|
return parent . '\' . child
|
|
else
|
|
let parent = substitute(a:parent, '/\+$', '', '')
|
|
let child = substitute(a:child, '^/\+', '', '')
|
|
return parent . '/' . child
|
|
endif
|
|
endif
|
|
return ''
|
|
endfunction
|
|
|
|
function! xolox#misc#path#commonprefix(paths) " {{{1
|
|
" Find the common prefix of path components in a list of pathnames.
|
|
let common = xolox#misc#path#split(a:paths[0])
|
|
for path in a:paths
|
|
let index = 0
|
|
for segment in xolox#misc#path#split(path)
|
|
if len(common) <= index
|
|
break
|
|
elseif common[index] != segment
|
|
call remove(common, index, -1)
|
|
break
|
|
endif
|
|
let index += 1
|
|
endfor
|
|
endfor
|
|
return xolox#misc#path#join(common)
|
|
endfunction
|
|
|
|
function! xolox#misc#path#starts_with(a, b) " {{{1
|
|
" Check whether the first pathname starts with the second pathname (expected
|
|
" to be a directory). This does not perform a regular string comparison;
|
|
" first it normalizes both pathnames, then it splits them into their
|
|
" pathname segments and then it compares the segments.
|
|
let a = xolox#misc#path#split(xolox#misc#path#absolute(a:a))
|
|
let b = xolox#misc#path#split(xolox#misc#path#absolute(a:b))
|
|
return a[0 : len(b) - 1] == b
|
|
endfunction
|
|
|
|
function! xolox#misc#path#encode(path) " {{{1
|
|
" Encode a pathname so it can be used as a filename. This uses URL encoding
|
|
" to encode special characters.
|
|
if s:windows_compatible
|
|
let mask = '[*|\\/:"<>?%]'
|
|
elseif xolox#misc#os#is_mac()
|
|
let mask = '[\\/%:]'
|
|
else
|
|
let mask = '[\\/%]'
|
|
endif
|
|
return substitute(a:path, mask, '\=printf("%%%x", char2nr(submatch(0)))', 'g')
|
|
endfunction
|
|
|
|
function! xolox#misc#path#decode(encoded_path) " {{{1
|
|
" Decode a pathname previously encoded with `xolox#misc#path#encode()`.
|
|
return substitute(a:encoded_path, '%\(\x\x\?\)', '\=nr2char("0x" . submatch(1))', 'g')
|
|
endfunction
|
|
|
|
" xolox#misc#path#equals(a, b) - Check whether two pathnames point to the same file. {{{1
|
|
|
|
if s:windows_compatible
|
|
function! xolox#misc#path#equals(a, b)
|
|
return a:a ==? a:b || xolox#misc#path#absolute(a:a) ==? xolox#misc#path#absolute(a:b)
|
|
endfunction
|
|
else
|
|
function! xolox#misc#path#equals(a, b)
|
|
return a:a ==# a:b || xolox#misc#path#absolute(a:a) ==# xolox#misc#path#absolute(a:b)
|
|
endfunction
|
|
endif
|
|
|
|
function! xolox#misc#path#is_relative(path) " {{{1
|
|
" Returns true (1) when the pathname given as the first argument is
|
|
" relative, false (0) otherwise.
|
|
if a:path =~ '^\w\+://'
|
|
return 0
|
|
elseif s:windows_compatible
|
|
return a:path !~ '^\(\w:\|[\\/]\)'
|
|
else
|
|
return a:path !~ '^/'
|
|
endif
|
|
endfunction
|
|
|
|
function! xolox#misc#path#tempdir() " {{{1
|
|
" Create a temporary directory and return the pathname of the directory.
|
|
if !exists('s:tempdir_counter')
|
|
let s:tempdir_counter = 1
|
|
endif
|
|
if exists('*mkdir')
|
|
if s:windows_compatible
|
|
let template = $TMP . '\vim_tempdir_'
|
|
elseif filewritable('/tmp') == 2
|
|
let template = '/tmp/vim_tempdir_'
|
|
endif
|
|
endif
|
|
if !exists('template')
|
|
throw "xolox#misc#path#tempdir() hasn't been implemented on your platform!"
|
|
endif
|
|
while 1
|
|
let directory = template . s:tempdir_counter
|
|
try
|
|
call mkdir(directory, '', 0700)
|
|
return directory
|
|
catch /^Vim\%((\a\+)\)\=:E739/
|
|
" Keep looking for a non-existing directory.
|
|
endtry
|
|
let s:tempdir_counter += 1
|
|
endwhile
|
|
endfunction
|
|
|
|
" vim: ts=2 sw=2 et
|