242 lines
8 KiB
VimL
242 lines
8 KiB
VimL
" oracle.vim -- Vim integration for the Go oracle.
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"
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" Part of this plugin was taken directly from the oracle repo, however it's
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" massively changed for a better integration into vim-go. Thanks Alan Donovan
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" for the first iteration based on quickfix! - Fatih Arslan
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"
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if !exists("g:go_oracle_bin")
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let g:go_oracle_bin = "oracle"
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endif
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" Parses (via regex) Oracle's 'plain' format output and puts them into a
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" location list
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func! s:loclist(output)
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let llist = []
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" Parse GNU-style 'file:line.col-line.col: message' format.
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let mx = '^\(\a:[\\/][^:]\+\|[^:]\+\):\(\d\+\):\(\d\+\):\(.*\)$'
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for line in split(a:output, "\n")
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let ml = matchlist(line, mx)
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" Ignore non-match lines or warnings
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if ml == [] || ml[4] =~ '^ warning:'
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continue
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endif
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let item = {
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\ 'filename': ml[1],
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\ 'text': ml[4],
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\ 'lnum': ml[2],
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\ 'col': ml[3],
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\}
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let bnr = bufnr(fnameescape(ml[1]))
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if bnr != -1
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let item['bufnr'] = bnr
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endif
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call add(llist, item)
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endfor
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call go#list#Populate("locationlist", llist)
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call go#list#Window("locationlist", len(llist))
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endfun
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" This uses Vim's errorformat to parse the output from Oracle's 'plain output
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" and put it into location list. I believe using errorformat is much more
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" easier to use. If we need more power we can always switch back to parse it
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" via regex.
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func! s:loclistSecond(output)
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" backup users errorformat, will be restored once we are finished
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let old_errorformat = &errorformat
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" match two possible styles of errorformats:
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"
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" 'file:line.col-line2.col2: message'
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" 'file:line:col: message'
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"
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" We discard line2 and col2 for the first errorformat, because it's not
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" useful and location only has the ability to show one line and column
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" number
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let errformat = "%f:%l.%c-%[%^:]%#:\ %m,%f:%l:%c:\ %m"
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call go#list#ParseFormat("locationlist", errformat, split(a:output, "\n"))
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let errors = go#list#Get("locationlist")
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call go#list#Window("locationlist", len(errors))
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endfun
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func! s:getpos(l, c)
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if &encoding != 'utf-8'
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let buf = a:l == 1 ? '' : (join(getline(1, a:l-1), "\n") . "\n")
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let buf .= a:c == 1 ? '' : getline('.')[:a:c-2]
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return len(iconv(buf, &encoding, 'utf-8'))
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endif
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return line2byte(a:l) + (a:c-2)
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endfun
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func! s:RunOracle(mode, selected, needs_package) range abort
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let fname = expand('%:p')
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let dname = expand('%:p:h')
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let pkg = go#package#ImportPath(dname)
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if exists('g:go_oracle_scope')
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" let the user defines the scope, must be a space separated string,
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" example: 'fmt math net/http'
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let scopes = split(get(g:, 'go_oracle_scope'))
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elseif a:needs_package || exists('g:go_oracle_include_tests') && pkg != -1
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" give import path so it includes all _test.go files too
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let scopes = [pkg]
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else
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" best usable way, only pass the package itself, without the test
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" files
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let scopes = go#tool#Files()
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endif
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"return with a warning if the bin doesn't exist
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let bin_path = go#path#CheckBinPath(g:go_oracle_bin)
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if empty(bin_path)
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return
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endif
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if exists('g:go_oracle_tags')
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let tags = get(g:, 'go_oracle_tags')
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else
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let tags = ""
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endif
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if a:selected != -1
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let pos1 = s:getpos(line("'<"), col("'<"))
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let pos2 = s:getpos(line("'>"), col("'>"))
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let cmd = printf('%s -format plain -pos=%s:#%d,#%d -tags=%s %s',
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\ bin_path,
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\ shellescape(fname), pos1, pos2, tags, a:mode)
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else
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let pos = s:getpos(line('.'), col('.'))
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let cmd = printf('%s -format plain -pos=%s:#%d -tags=%s %s',
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\ bin_path,
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\ shellescape(fname), pos, tags, a:mode)
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endif
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" strip trailing slashes for each path in scoped. bug:
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" https://github.com/golang/go/issues/14584
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let scopes = go#util#StripTrailingSlash(scopes)
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" now append each scope to the end as Oracle's scope parameter. It can be
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" a packages or go files, dependent on the User's own choice. For more
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" info check Oracle's User Manual section about scopes:
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" https://docs.google.com/document/d/1SLk36YRjjMgKqe490mSRzOPYEDe0Y_WQNRv-EiFYUyw/view#heading=h.nwso96pj07q8
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let cmd .= ' ' . go#util#Shelljoin(scopes)
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echon "vim-go: " | echohl Identifier | echon "analysing ..." | echohl None
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let old_gopath = $GOPATH
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let $GOPATH = go#path#Detect()
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let out = system(cmd)
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let $GOPATH = old_gopath
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if v:shell_error
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" unfortunaly oracle outputs a very long stack trace that is not
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" parsable to show the real error. But the main issue is usually the
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" package which doesn't build.
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redraw | echon "vim-go: " | echohl Statement | echon out | echohl None
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return ""
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endif
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return out
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endfunc
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function! go#oracle#Scope(...)
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if a:0
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if a:0 == 1 && a:1 == '""'
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unlet g:go_oracle_scope
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echon "vim-go: " | echohl Function | echon "oracle scope is cleared"| echohl None
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else
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let g:go_oracle_scope = join(a:000, ' ')
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echon "vim-go: " | echohl Function | echon "oracle scope changed to: '". g:go_oracle_scope ."'" | echohl None
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endif
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return
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endif
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if !exists('g:go_oracle_scope')
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echon "vim-go: " | echohl Function | echon "oracle scope is not set"| echohl None
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else
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echon "vim-go: " | echohl Function | echon "current oracle scope: '". g:go_oracle_scope ."'" | echohl None
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endif
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endfunction
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function! go#oracle#Tags(...)
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if a:0
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if a:0 == 1 && a:1 == '""'
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unlet g:go_oracle_tags
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echon "vim-go: " | echohl Function | echon "oracle tags is cleared"| echohl None
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else
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let g:go_oracle_tags = a:1
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echon "vim-go: " | echohl Function | echon "oracle tags changed to: '". g:go_oracle_tags ."'" | echohl None
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endif
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return
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endif
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if !exists('g:go_oracle_tags')
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echon "vim-go: " | echohl Function | echon "oracle tags is not set"| echohl None
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else
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echon "vim-go: " | echohl Function | echon "current oracle tags: '". g:go_oracle_tags ."'" | echohl None
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endif
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endfunction
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" Show 'implements' relation for selected package
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function! go#oracle#Implements(selected)
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let out = s:RunOracle('implements', a:selected, 0)
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call s:loclistSecond(out)
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endfunction
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" Describe selected syntax: definition, methods, etc
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function! go#oracle#Describe(selected)
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let out = s:RunOracle('describe', a:selected, 0)
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call s:loclistSecond(out)
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endfunction
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" Show possible targets of selected function call
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function! go#oracle#Callees(selected)
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let out = s:RunOracle('callees', a:selected, 1)
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call s:loclistSecond(out)
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endfunction
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" Show possible callers of selected function
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function! go#oracle#Callers(selected)
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let out = s:RunOracle('callers', a:selected, 1)
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call s:loclistSecond(out)
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endfunction
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" Show path from callgraph root to selected function
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function! go#oracle#Callstack(selected)
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let out = s:RunOracle('callstack', a:selected, 1)
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call s:loclistSecond(out)
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endfunction
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" Show free variables of selection
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function! go#oracle#Freevars(selected)
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" Freevars requires a selection
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if a:selected == -1
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echon "vim-go: " | echohl Statement | echon "GoFreevars requires a selection (range) of code "| echohl None
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return
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endif
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let out = s:RunOracle('freevars', a:selected, 0)
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call s:loclistSecond(out)
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endfunction
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" Show send/receive corresponding to selected channel op
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function! go#oracle#ChannelPeers(selected)
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let out = s:RunOracle('peers', a:selected, 1)
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call s:loclistSecond(out)
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endfunction
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" Show all refs to entity denoted by selected identifier
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function! go#oracle#Referrers(selected)
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let out = s:RunOracle('referrers', a:selected, 0)
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call s:loclistSecond(out)
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endfunction
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" vim:ts=4:sw=4:et
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"
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