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" Author: Joshua Rubin <joshua@rubixconsulting.com>
" Description: go build for Go files
" inspired by work from dzhou121 <dzhou121@gmail.com>
function! ale_linters#go#gobuild#GoEnv(buffer) abort
if exists('s:go_env')
return ''
endif
return 'go env GOPATH GOROOT'
endfunction
let s:SplitChar = has('unix') ? ':' : ':'
" get a list of all source directories from $GOPATH and $GOROOT
function! s:SrcDirs() abort
let l:paths = split(s:go_env.GOPATH, s:SplitChar)
call add(l:paths, s:go_env.GOROOT)
return l:paths
endfunction
" figure out from a directory like `/home/user/go/src/some/package` that the
" import for that path is simply `some/package`
function! s:PackageImportPath(buffer) abort
let l:bufname = resolve(bufname(a:buffer))
let l:pkgdir = fnamemodify(l:bufname, ':p:h')
for l:path in s:SrcDirs()
let l:path = l:path . '/src/'
if stridx(l:pkgdir, l:path) == 0
return l:pkgdir[strlen(l:path):]
endif
endfor
return ''
endfunction
" get the package info data structure using `go list`
function! ale_linters#go#gobuild#GoList(buffer, goenv_output) abort
if !empty(a:goenv_output)
let s:go_env = {
\ 'GOPATH': a:goenv_output[0],
\ 'GOROOT': a:goenv_output[1],
\}
endif
return 'go list -json ' . shellescape(s:PackageImportPath(a:buffer))
endfunction
let s:filekeys = [
\ 'GoFiles',
\ 'CgoFiles',
\ 'CFiles',
\ 'CXXFiles',
\ 'MFiles',
\ 'HFiles',
\ 'FFiles',
\ 'SFiles',
\ 'SwigFiles',
\ 'SwigCXXFiles',
\ 'SysoFiles',
\ 'TestGoFiles',
\ 'XTestGoFiles',
\]
" get the go and test go files from the package
" will return empty list if the package has any cgo or other invalid files
function! s:PkgFiles(pkginfo) abort
let l:files = []
for l:key in s:filekeys
if has_key(a:pkginfo, l:key)
call extend(l:files, a:pkginfo[l:key])
endif
endfor
" resolve the path of the file relative to the window directory
return map(l:files, 'shellescape(fnamemodify(resolve(a:pkginfo.Dir . ''/'' . v:val), '':p''))')
endfunction
function! ale_linters#go#gobuild#CopyFiles(buffer, golist_output) abort
let l:tempdir = tempname()
let l:temppkgdir = l:tempdir . '/src/' . s:PackageImportPath(a:buffer)
call mkdir(l:temppkgdir, 'p', 0700)
if empty(a:golist_output)
return 'echo ' . shellescape(l:tempdir)
endif
" parse the output
let l:pkginfo = json_decode(join(a:golist_output, "\n"))
" get all files for the package
let l:files = s:PkgFiles(l:pkginfo)
" copy the files to a temp directory with $GOPATH structure
return 'cp ' . join(l:files, ' ') . ' ' . shellescape(l:temppkgdir) . ' && echo ' . shellescape(l:tempdir)
endfunction
function! ale_linters#go#gobuild#GetCommand(buffer, copy_output) abort
let l:tempdir = a:copy_output[0]
let l:importpath = s:PackageImportPath(a:buffer)
" write the a:buffer and any modified buffers from the package to the tempdir
for l:bufnum in range(1, bufnr('$'))
" ignore unloaded buffers (can't be a:buffer or a modified buffer)
if !bufloaded(l:bufnum)
continue
endif
" ignore non-Go buffers
if getbufvar(l:bufnum, '&ft') !=# 'go'
continue
endif
" only consider buffers other than a:buffer if they have the same import
" path as a:buffer and are modified
if l:bufnum != a:buffer
if s:PackageImportPath(l:bufnum) !=# l:importpath
continue
endif
if !getbufvar(l:bufnum, '&mod')
continue
endif
endif
call writefile(getbufline(l:bufnum, 1, '$'), l:tempdir . '/src/' . s:PkgFile(l:bufnum))
endfor
let l:gopaths = [ l:tempdir ]
call extend(l:gopaths, split(s:go_env.GOPATH, s:SplitChar))
return 'GOPATH=' . shellescape(join(l:gopaths, s:SplitChar)) . ' go test -c -o /dev/null ' . shellescape(l:importpath)
endfunction
function! s:PkgFile(buffer) abort
let l:bufname = resolve(bufname(a:buffer))
let l:importpath = s:PackageImportPath(a:buffer)
let l:fname = fnamemodify(l:bufname, ':t')
return l:importpath . '/' . l:fname
endfunction
function! s:FindBuffer(file) abort
for l:buffer in range(1, bufnr('$'))
if !buflisted(l:buffer)
continue
endif
let l:pkgfile = s:PkgFile(l:buffer)
if a:file =~ '/' . l:pkgfile . '$'
return l:buffer
endif
endfor
return -1
endfunction
let s:path_pattern = '[a-zA-Z]\?\\\?:\?[[:alnum:]/\.\-_]\+'
let s:handler_pattern = '^\(' . s:path_pattern . '\):\(\d\+\):\?\(\d\+\)\?: \(.\+\)$'
let s:multibuffer = 0
function! ale_linters#go#gobuild#Handler(buffer, lines) abort
let l:output = []
for l:line in a:lines
let l:match = matchlist(l:line, s:handler_pattern)
if len(l:match) == 0
continue
endif
let l:buffer = s:FindBuffer(l:match[1])
if l:buffer == -1
continue
endif
if !s:multibuffer && l:buffer != a:buffer
" strip lines from other buffers
continue
endif
call add(l:output, {
\ 'bufnr': l:buffer,
\ 'lnum': l:match[2] + 0,
\ 'col': l:match[3] + 0,
\ 'text': l:match[4],
\ 'type': 'E',
\})
endfor
return l:output
endfunction
call ale#linter#Define('go', {
\ 'name': 'go build',
\ 'executable': 'go',
\ 'command_chain': [
\ {'callback': 'ale_linters#go#gobuild#GoEnv', 'output_stream': 'stdout'},
\ {'callback': 'ale_linters#go#gobuild#GoList', 'output_stream': 'stdout'},
\ {'callback': 'ale_linters#go#gobuild#CopyFiles', 'output_stream': 'stdout'},
\ {'callback': 'ale_linters#go#gobuild#GetCommand', 'output_stream': 'stderr'},
\ ],
\ 'callback': 'ale_linters#go#gobuild#Handler',
\})
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