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cmd/guru: emit initial referrers result earlier

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This simplifies and unifies the code.
It also improves the output:
Now the initial result is referred to from the perspective of
the query site, rather than from the perspective of the package
containing the query object, which seems more natural.

This work supported by Sourcegraph.

Change-Id: Ie7a77d39dd6568334e72d894dc66d35494ed4ac4
Reviewed-on: https://go-review.googlesource.com/108936
Reviewed-by: Alan Donovan <adonovan@google.com>
This commit is contained in:
Josh Bleecher Snyder 2018-04-23 12:57:10 -07:00
parent d4c6246f3e
commit c1f4e2c6dc
2 changed files with 15 additions and 20 deletions
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33
cmd/guru/referrers.go
View File

@ -80,26 +80,25 @@ func referrers(q *Query) error {
return fmt.Errorf("references to predeclared %q are everywhere!", obj.Name())
}
// For a globally accessible object defined in package P, we
// must load packages that depend on P. Specifically, for a
// package-level object, we need load only direct importers
// of P, but for a field or method, we must load
// any package that transitively imports P.
global, pkglevel := classify(obj)
if global && !pkglevel {
// We'll use the the object's position to identify it in the larger program.
objposn := fset.Position(obj.Pos())
defpkg := obj.Pkg().Path() // defining package
return globalReferrers(q, qpos.info.Pkg.Path(), defpkg, objposn)
}
q.Output(fset, &referrersInitialResult{
qinfo: qpos.info,
obj: obj,
})
if global {
return globalReferrersPkgLevel(q, obj, fset)
// For a globally accessible object defined in package P, we
// must load packages that depend on P. Specifically, for a
// package-level object, we need load only direct importers
// of P, but for a field or method, we must load
// any package that transitively imports P.
if global, pkglevel := classify(obj); global {
if pkglevel {
return globalReferrersPkgLevel(q, obj, fset)
}
// We'll use the the object's position to identify it in the larger program.
objposn := fset.Position(obj.Pos())
defpkg := obj.Pkg().Path() // defining package
return globalReferrers(q, qpos.info.Pkg.Path(), defpkg, objposn)
}
outputUses(q, fset, usesOf(obj, qpos.info), obj.Pkg())
@ -295,10 +294,6 @@ func globalReferrers(q *Query, qpkg, defpkg string, objposn token.Position) erro
// Object found.
qinfo = info
q.Output(fset, &referrersInitialResult{
qinfo: qinfo,
obj: qobj,
})
}
obj := qobj
mu.Unlock()

2
cmd/guru/testdata/src/referrers/main.golden vendored
View File

@ -33,7 +33,7 @@ type _ lib.T
var _ lib.Var // @what pkg "lib"
-------- @referrers ref-method --------
references to func (Type).Method(x *int) *int
references to func (lib.Type).Method(x *int) *int
_ = (lib.Type).Method // ref from external test package
_ = (lib.Type).Method // ref from internal test package
_ = v.Method