589 lines
16 KiB
VimL
589 lines
16 KiB
VimL
" guru.vim -- Vim integration for the Go guru.
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" guru_cmd returns a dict that contains the command to execute guru. args
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" is dict with following options:
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" mode : guru mode, such as 'implements'
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" format : output format, either 'plain' or 'json'
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" needs_scope : if 1, adds the current package to the scope
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" selected : if 1, means it's a range of selection, otherwise it picks up the
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" offset under the cursor
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" example output:
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" {'cmd' : ['guru', '-json', 'implements', 'demo/demo.go:#66']}
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function! s:guru_cmd(args) range abort
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let mode = a:args.mode
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let format = a:args.format
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let needs_scope = a:args.needs_scope
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let selected = a:args.selected
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let result = {}
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"return with a warning if the binary doesn't exist
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let bin_path = go#path#CheckBinPath("guru")
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if empty(bin_path)
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return {'err': "bin path not found"}
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endif
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" start constructing the command
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let cmd = [bin_path, '-tags', go#config#BuildTags()]
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if &modified
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let result.stdin_content = go#util#archive()
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call add(cmd, "-modified")
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endif
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" enable outputting in json format
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if format == "json"
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call add(cmd, "-json")
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endif
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let scopes = go#config#GuruScope()
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if empty(scopes)
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" some modes require scope to be defined (such as callers). For these we
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" choose a sensible setting, which is using the current file's package
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if needs_scope
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let pkg = go#package#ImportPath()
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if pkg == -1
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return {'err': "current directory is not inside of a valid GOPATH"}
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endif
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let scopes = [pkg]
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endif
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endif
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" Add the scope.
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if !empty(scopes)
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" guru expect a comma-separated list of patterns.
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let l:scope = join(scopes, ",")
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let result.scope = l:scope
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call extend(cmd, ["-scope", l:scope])
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endif
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let pos = printf("#%s", go#util#OffsetCursor())
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if selected != -1
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" means we have a range, get it
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let pos1 = go#util#Offset(line("'<"), col("'<"))
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let pos2 = go#util#Offset(line("'>"), col("'>"))
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let pos = printf("#%s,#%s", pos1, pos2)
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endif
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let l:filename = fnamemodify(expand("%"), ':p:gs?\\?/?') . ':' . pos
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call extend(cmd, [mode, l:filename])
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let result.cmd = cmd
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return result
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endfunction
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" sync_guru runs guru in sync mode with the given arguments
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function! s:sync_guru(args) abort
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let result = s:guru_cmd(a:args)
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if has_key(result, 'err')
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call go#util#EchoError(result.err)
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return -1
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endif
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if !has_key(a:args, 'disable_progress')
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if a:args.needs_scope
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call go#util#EchoProgress("analysing with scope ". result.scope .
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\ " (see ':help go-guru-scope' if this doesn't work)...")
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elseif a:args.mode !=# 'what'
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" the query might take time, let us give some feedback
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call go#util#EchoProgress("analysing ...")
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endif
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endif
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" run, forrest run!!!
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if has_key(l:result, 'stdin_content')
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let [l:out, l:err] = go#util#Exec(l:result.cmd, l:result.stdin_content)
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else
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let [l:out, l:err] = go#util#Exec(l:result.cmd)
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endif
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if has_key(a:args, 'custom_parse')
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call a:args.custom_parse(l:err, l:out, a:args.mode)
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else
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call s:parse_guru_output(l:err, l:out, a:args.mode)
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endif
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return l:out
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endfunc
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" async_guru runs guru in async mode with the given arguments
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function! s:async_guru(args) abort
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let result = s:guru_cmd(a:args)
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if has_key(result, 'err')
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call go#util#EchoError(result.err)
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return
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endif
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let state = {
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\ 'mode': a:args.mode,
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\ 'parse' : get(a:args, 'custom_parse', funcref("s:parse_guru_output"))
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\ }
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function! s:complete(job, exit_status, messages) dict abort
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let output = join(a:messages, "\n")
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call self.parse(a:exit_status, output, self.mode)
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endfunction
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" explicitly bind complete to state so that within it, self will
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" always refer to state. See :help Partial for more information.
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let state.complete = function('s:complete', [], state)
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let opts = {
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\ 'statustype': get(a:args, 'statustype', a:args.mode),
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\ 'for': '_',
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\ 'errorformat': "%f:%l.%c-%[%^:]%#:\ %m,%f:%l:%c:\ %m",
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\ 'complete': state.complete,
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\ }
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if has_key(a:args, 'disable_progress')
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let opts.statustype = ''
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endif
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let opts = go#job#Options(l:opts)
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if has_key(result, 'stdin_content')
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let l:tmpname = tempname()
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call writefile(split(result.stdin_content, "\n"), l:tmpname, "b")
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let l:opts.in_io = "file"
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let l:opts.in_name = l:tmpname
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endif
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call go#job#Start(result.cmd, opts)
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if a:args.needs_scope && go#config#EchoCommandInfo() && !has_key(a:args, 'disable_progress')
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call go#util#EchoProgress("analysing with scope " . result.scope .
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\ " (see ':help go-guru-scope' if this doesn't work)...")
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endif
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endfunc
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" run_guru runs the given guru argument
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function! s:run_guru(args) abort
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if go#util#has_job()
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let res = s:async_guru(a:args)
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else
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let res = s:sync_guru(a:args)
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endif
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return res
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endfunction
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" Show 'implements' relation for selected package
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function! go#guru#Implements(selected) abort
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let args = {
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\ 'mode': 'implements',
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\ 'format': 'plain',
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\ 'selected': a:selected,
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\ 'needs_scope': 1,
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\ }
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call s:run_guru(args)
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endfunction
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" Shows the set of possible objects to which a pointer may point.
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function! go#guru#PointsTo(selected) abort
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let l:args = {
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\ 'mode': 'pointsto',
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\ 'format': 'plain',
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\ 'selected': a:selected,
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\ 'needs_scope': 1,
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\ }
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call s:run_guru(l:args)
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endfunction
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" Report the possible constants, global variables, and concrete types that may
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" appear in a value of type error
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function! go#guru#Whicherrs(selected) abort
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let args = {
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\ 'mode': 'whicherrs',
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\ 'format': 'plain',
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\ 'selected': a:selected,
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\ 'needs_scope': 1,
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\ }
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" TODO(arslan): handle empty case for both sync/async
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" if empty(out.out)
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" call go#util#EchoSuccess("no error variables found. Try to change the scope with :GoGuruScope")
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" return
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" endif
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call s:run_guru(args)
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endfunction
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" Describe selected syntax: definition, methods, etc
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function! go#guru#Describe(selected) abort
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let args = {
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\ 'mode': 'describe',
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\ 'format': 'plain',
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\ 'selected': a:selected,
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\ 'needs_scope': 1,
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\ }
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call s:run_guru(args)
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endfunction
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function! go#guru#DescribeInfo(showstatus) abort
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" json_encode() and friends are introduced with this patch (7.4.1304)
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" vim: https://groups.google.com/d/msg/vim_dev/vLupTNhQhZ8/cDGIk0JEDgAJ
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" nvim: https://github.com/neovim/neovim/pull/4131
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if !exists("*json_decode")
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call go#util#EchoError("requires 'json_decode'. Update your Vim/Neovim version.")
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return
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endif
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function! s:info(exit_val, output, mode)
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if a:exit_val != 0
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return
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endif
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if a:output[0] !=# '{'
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return
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endif
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if empty(a:output) || type(a:output) != type("")
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return
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endif
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let result = json_decode(a:output)
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if type(result) != type({})
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call go#util#EchoError(printf("malformed output from guru: %s", a:output))
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return
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endif
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if !has_key(result, 'detail')
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" if there is no detail check if there is a description and print it
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if has_key(result, "desc")
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call go#util#EchoInfo(result["desc"])
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return
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endif
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call go#util#EchoError("detail key is missing. Please open a bug report on vim-go repo.")
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return
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endif
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let detail = result['detail']
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let info = ""
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" guru gives different information based on the detail mode. Let try to
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" extract the most useful information
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if detail == "value"
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if !has_key(result, 'value')
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call go#util#EchoError("value key is missing. Please open a bug report on vim-go repo.")
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return
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endif
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let val = result["value"]
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if !has_key(val, 'type')
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call go#util#EchoError("type key is missing (value.type). Please open a bug report on vim-go repo.")
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return
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endif
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let info = val["type"]
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elseif detail == "type"
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if !has_key(result, 'type')
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call go#util#EchoError("type key is missing. Please open a bug report on vim-go repo.")
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return
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endif
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let type = result["type"]
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if !has_key(type, 'type')
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call go#util#EchoError("type key is missing (type.type). Please open a bug report on vim-go repo.")
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return
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endif
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let info = type["type"]
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elseif detail == "package"
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if !has_key(result, 'package')
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call go#util#EchoError("package key is missing. Please open a bug report on vim-go repo.")
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return
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endif
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let package = result["package"]
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if !has_key(package, 'path')
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call go#util#EchoError("path key is missing (package.path). Please open a bug report on vim-go repo.")
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return
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endif
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let info = printf("package %s", package["path"])
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elseif detail == "unknown"
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let info = result["desc"]
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else
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call go#util#EchoError(printf("unknown detail mode found '%s'. Please open a bug report on vim-go repo", detail))
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return
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endif
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echo "vim-go: " | echohl Function | echon info | echohl None
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endfunction
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let args = {
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\ 'mode': 'describe',
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\ 'format': 'json',
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\ 'selected': -1,
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\ 'needs_scope': 0,
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\ 'custom_parse': function('s:info'),
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\ 'disable_progress': 1,
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\ }
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call s:run_guru(args)
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endfunction
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" Show possible targets of selected function call
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function! go#guru#Callees(selected) abort
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let args = {
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\ 'mode': 'callees',
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\ 'format': 'plain',
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\ 'selected': a:selected,
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\ 'needs_scope': 1,
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\ }
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call s:run_guru(args)
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endfunction
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" Show possible callers of selected function
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function! go#guru#Callers(selected) abort
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let args = {
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\ 'mode': 'callers',
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\ 'format': 'plain',
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\ 'selected': a:selected,
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\ 'needs_scope': 1,
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\ }
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call s:run_guru(args)
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endfunction
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" Show path from callgraph root to selected function
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function! go#guru#Callstack(selected) abort
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let args = {
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\ 'mode': 'callstack',
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\ 'format': 'plain',
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\ 'selected': a:selected,
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\ 'needs_scope': 1,
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\ }
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call s:run_guru(args)
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endfunction
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" Show free variables of selection
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function! go#guru#Freevars(selected) abort
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" Freevars requires a selection
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if a:selected == -1
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call go#util#EchoError("GoFreevars requires a selection (range) of code")
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return
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endif
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let args = {
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\ 'mode': 'freevars',
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\ 'format': 'plain',
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\ 'selected': 1,
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\ 'needs_scope': 0,
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\ }
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call s:run_guru(args)
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endfunction
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" Show send/receive corresponding to selected channel op
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function! go#guru#ChannelPeers(selected) abort
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let args = {
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\ 'mode': 'peers',
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\ 'format': 'plain',
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\ 'selected': a:selected,
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\ 'needs_scope': 1,
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\ }
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call s:run_guru(args)
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endfunction
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" Show all refs to entity denoted by selected identifier
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function! go#guru#Referrers(selected) abort
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let args = {
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\ 'mode': 'referrers',
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\ 'format': 'plain',
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\ 'selected': a:selected,
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\ 'needs_scope': 0,
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\ }
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call s:run_guru(args)
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endfunction
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function! go#guru#SameIds(showstatus) abort
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" we use matchaddpos() which was introduce with 7.4.330, be sure we have
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" it: http://ftp.vim.org/vim/patches/7.4/7.4.330
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if !exists("*matchaddpos")
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call go#util#EchoError("GoSameIds requires 'matchaddpos'. Update your Vim/Neovim version.")
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return
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endif
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" json_encode() and friends are introduced with this patch (7.4.1304)
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" vim: https://groups.google.com/d/msg/vim_dev/vLupTNhQhZ8/cDGIk0JEDgAJ
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" nvim: https://github.com/neovim/neovim/pull/4131
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if !exists("*json_decode")
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call go#util#EchoError("GoSameIds requires 'json_decode'. Update your Vim/Neovim version.")
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return
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endif
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let args = {
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\ 'mode': 'what',
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\ 'format': 'json',
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\ 'selected': -1,
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\ 'needs_scope': 0,
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\ 'custom_parse': function('s:same_ids_highlight'),
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\ }
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if !a:showstatus
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let args.disable_progress = 1
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endif
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call s:run_guru(args)
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endfunction
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function! s:same_ids_highlight(exit_val, output, mode) abort
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call go#guru#ClearSameIds() " run after calling guru to reduce flicker.
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if a:output[0] !=# '{'
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if !go#config#AutoSameids()
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call go#util#EchoError(a:output)
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endif
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return
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endif
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let result = json_decode(a:output)
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if type(result) != type({}) && !go#config#AutoSameids()
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call go#util#EchoError("malformed output from guru")
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return
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endif
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if !has_key(result, 'sameids')
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if !go#config#AutoSameids()
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call go#util#EchoError("no same_ids founds for the given identifier")
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endif
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return
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endif
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let poslen = 0
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for enclosing in result['enclosing']
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if enclosing['desc'] == 'identifier'
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let poslen = enclosing['end'] - enclosing['start']
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break
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endif
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endfor
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" return when there's no identifier to highlight.
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if poslen == 0
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return
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endif
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let same_ids = result['sameids']
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" highlight the lines
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for item in same_ids
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let pos = split(item, ':')
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call matchaddpos('goSameId', [[str2nr(pos[-2]), str2nr(pos[-1]), str2nr(poslen)]])
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endfor
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if go#config#AutoSameids()
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" re-apply SameIds at the current cursor position at the time the buffer
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" is redisplayed: e.g. :edit, :GoRename, etc.
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augroup vim-go-sameids
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autocmd!
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autocmd BufWinEnter <buffer> nested call go#guru#SameIds()
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augroup end
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endif
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endfunction
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" ClearSameIds returns 0 when it removes goSameId groups and non-zero if no
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" goSameId groups are found.
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function! go#guru#ClearSameIds() abort
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let l:cleared = 0
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let m = getmatches()
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for item in m
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if item['group'] == 'goSameId'
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call matchdelete(item['id'])
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let l:cleared = 1
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endif
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endfor
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if !l:cleared
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return 1
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endif
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" remove the autocmds we defined
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augroup vim-go-sameids
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autocmd!
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augroup end
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return 0
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endfunction
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function! go#guru#ToggleSameIds() abort
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if go#guru#ClearSameIds() != 0
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call go#guru#SameIds()
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endif
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endfunction
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function! go#guru#AutoToogleSameIds() abort
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if go#config#AutoSameids()
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call go#util#EchoProgress("sameids auto highlighting disabled")
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call go#guru#ClearSameIds()
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call go#config#SetAutoSameids(0)
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return
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endif
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call go#util#EchoSuccess("sameids auto highlighting enabled")
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call go#config#SetAutoSameids(1)
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endfunction
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""""""""""""""""""""""""""""""""""""""""
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"" HELPER FUNCTIONS
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""""""""""""""""""""""""""""""""""""""""
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|
" This uses Vim's errorformat to parse the output from Guru's 'plain output
|
|
" and put it into location list. I believe using errorformat is much more
|
|
" easier to use. If we need more power we can always switch back to parse it
|
|
" via regex. Match two possible styles of errorformats:
|
|
"
|
|
" 'file:line.col-line2.col2: message'
|
|
" 'file:line:col: message'
|
|
"
|
|
" We discard line2 and col2 for the first errorformat, because it's not
|
|
" useful and location only has the ability to show one line and column
|
|
" number
|
|
function! s:parse_guru_output(exit_val, output, title) abort
|
|
if a:exit_val
|
|
call go#util#EchoError(a:output)
|
|
return
|
|
endif
|
|
|
|
let errformat = "%f:%l.%c-%[%^:]%#:\ %m,%f:%l:%c:\ %m"
|
|
let l:listtype = go#list#Type("_guru")
|
|
call go#list#ParseFormat(l:listtype, errformat, a:output, a:title)
|
|
|
|
let errors = go#list#Get(l:listtype)
|
|
call go#list#Window(l:listtype, len(errors))
|
|
endfun
|
|
|
|
function! go#guru#Scope(...) abort
|
|
if a:0
|
|
let scope = a:000
|
|
if a:0 == 1 && a:1 == '""'
|
|
let scope = []
|
|
endif
|
|
|
|
call go#config#SetGuruScope(scope)
|
|
if empty(scope)
|
|
call go#util#EchoSuccess("guru scope is cleared")
|
|
else
|
|
call go#util#EchoSuccess("guru scope changed to: ". join(a:000, ","))
|
|
endif
|
|
|
|
return
|
|
endif
|
|
|
|
let scope = go#config#GuruScope()
|
|
if empty(scope)
|
|
call go#util#EchoError("guru scope is not set")
|
|
else
|
|
call go#util#EchoSuccess("current guru scope: ". join(scope, ","))
|
|
endif
|
|
endfunction
|
|
|
|
" vim: sw=2 ts=2 et
|