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214 lines
7.0 KiB
VimL
214 lines
7.0 KiB
VimL
9 years ago
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" Copyright 2011 The Go Authors. All rights reserved.
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" Use of this source code is governed by a BSD-style
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" license that can be found in the LICENSE file.
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"
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" Check out the docs for more information at /doc/vim-go.txt
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"
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function! go#import#SwitchImport(enabled, localname, path, bang)
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let view = winsaveview()
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let path = substitute(a:path, '^\s*\(.\{-}\)\s*$', '\1', '')
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" Quotes are not necessary, so remove them if provided.
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if path[0] == '"'
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let path = strpart(path, 1)
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endif
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if path[len(path)-1] == '"'
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let path = strpart(path, 0, len(path) - 1)
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endif
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" if given a trailing slash, eg. `github.com/user/pkg/`, remove it
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if path[len(path)-1] == '/'
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let path = strpart(path, 0, len(path) - 1)
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endif
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if path == ''
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call s:Error('Import path not provided')
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return
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endif
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if a:bang == "!"
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let out = system("go get -u -v ".shellescape(path))
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if v:shell_error
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call s:Error("Can't find import: " . path . ":" . out)
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endif
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endif
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let exists = go#tool#Exists(path)
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if exists == -1
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call s:Error("Can't find import: " . path)
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return
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endif
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" Extract any site prefix (e.g. github.com/).
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" If other imports with the same prefix are grouped separately,
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" we will add this new import with them.
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" Only up to and including the first slash is used.
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let siteprefix = matchstr(path, "^[^/]*/")
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let qpath = '"' . path . '"'
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if a:localname != ''
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let qlocalpath = a:localname . ' ' . qpath
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else
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let qlocalpath = qpath
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endif
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let indentstr = 0
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let packageline = -1 " Position of package name statement
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let appendline = -1 " Position to introduce new import
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let deleteline = -1 " Position of line with existing import
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let linesdelta = 0 " Lines added/removed
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" Find proper place to add/remove import.
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let line = 0
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while line <= line('$')
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let linestr = getline(line)
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if linestr =~# '^package\s'
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let packageline = line
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let appendline = line
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elseif linestr =~# '^import\s\+('
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let appendstr = qlocalpath
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let indentstr = 1
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let appendline = line
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let firstblank = -1
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let lastprefix = ""
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while line <= line("$")
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let line = line + 1
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let linestr = getline(line)
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let m = matchlist(getline(line), '^\()\|\(\s\+\)\(\S*\s*\)"\(.\+\)"\)')
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if empty(m)
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if siteprefix == "" && a:enabled
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" must be in the first group
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break
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endif
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" record this position, but keep looking
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if firstblank < 0
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let firstblank = line
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endif
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continue
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endif
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if m[1] == ')'
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" if there's no match, add it to the first group
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if appendline < 0 && firstblank >= 0
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let appendline = firstblank
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endif
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break
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endif
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let lastprefix = matchstr(m[4], "^[^/]*/")
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if a:localname != '' && m[3] != ''
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let qlocalpath = printf('%-' . (len(m[3])-1) . 's %s', a:localname, qpath)
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endif
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let appendstr = m[2] . qlocalpath
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let indentstr = 0
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if m[4] == path
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let appendline = -1
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let deleteline = line
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break
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elseif m[4] < path
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" don't set candidate position if we have a site prefix,
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" we've passed a blank line, and this doesn't share the same
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" site prefix.
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if siteprefix == "" || firstblank < 0 || match(m[4], "^" . siteprefix) >= 0
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let appendline = line
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endif
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elseif siteprefix != "" && match(m[4], "^" . siteprefix) >= 0
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" first entry of site group
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let appendline = line - 1
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break
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endif
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endwhile
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break
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elseif linestr =~# '^import '
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if appendline == packageline
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let appendstr = 'import ' . qlocalpath
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let appendline = line - 1
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endif
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let m = matchlist(linestr, '^import\(\s\+\)\(\S*\s*\)"\(.\+\)"')
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if !empty(m)
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if m[3] == path
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let appendline = -1
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let deleteline = line
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break
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endif
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if m[3] < path
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let appendline = line
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endif
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if a:localname != '' && m[2] != ''
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let qlocalpath = printf("%s %" . len(m[2])-1 . "s", a:localname, qpath)
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endif
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let appendstr = 'import' . m[1] . qlocalpath
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endif
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elseif linestr =~# '^\(var\|const\|type\|func\)\>'
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break
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endif
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let line = line + 1
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endwhile
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" Append or remove the package import, as requested.
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if a:enabled
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if deleteline != -1
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call s:Error(qpath . ' already being imported')
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elseif appendline == -1
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call s:Error('No package line found')
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else
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if appendline == packageline
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call append(appendline + 0, '')
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call append(appendline + 1, 'import (')
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call append(appendline + 2, ')')
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let appendline += 2
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let linesdelta += 3
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let appendstr = qlocalpath
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let indentstr = 1
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endif
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call append(appendline, appendstr)
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execute appendline + 1
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if indentstr
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execute 'normal! >>'
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endif
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let linesdelta += 1
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endif
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else
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if deleteline == -1
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call s:Error(qpath . ' not being imported')
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else
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execute deleteline . 'd'
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let linesdelta -= 1
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if getline(deleteline-1) =~# '^import\s\+(' && getline(deleteline) =~# '^)'
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" Delete empty import block
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let deleteline -= 1
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execute deleteline . "d"
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execute deleteline . "d"
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let linesdelta -= 2
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endif
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if getline(deleteline) == '' && getline(deleteline - 1) == ''
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" Delete spacing for removed line too.
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execute deleteline . "d"
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let linesdelta -= 1
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endif
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endif
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endif
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" Adjust view for any changes.
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let view.lnum += linesdelta
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let view.topline += linesdelta
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if view.topline < 0
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let view.topline = 0
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endif
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" Put buffer back where it was.
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call winrestview(view)
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endfunction
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function! s:Error(s)
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echohl Error | echo a:s | echohl None
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endfunction
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" vim:ts=4:sw=4:et
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