// reduceScope is called for one-shot queries that need only a single // typed package. It attempts to guess the query package from pos and // reduce the analysis scope (set of loaded packages) to just that one // plus (the exported parts of) its dependencies. It leaves its // arguments unchanged on failure. // // TODO(adonovan): this is a real mess... but it's fast. // func reduceScope(pos string, conf *loader.Config) { fqpos, err := fastQueryPos(pos) if err != nil { return // bad query } // TODO(adonovan): fix: this gives the wrong results for files // in non-importable packages such as tests and ad-hoc packages // specified as a list of files (incl. the oracle's tests). _, importPath, err := guessImportPath(fqpos.fset.File(fqpos.start).Name(), conf.Build) if err != nil { return // can't find GOPATH dir } if importPath == "" { return } // Check that it's possible to load the queried package. // (e.g. oracle tests contain different 'package' decls in same dir.) // Keep consistent with logic in loader/util.go! cfg2 := *conf.Build cfg2.CgoEnabled = false bp, err := cfg2.Import(importPath, "", 0) if err != nil { return // no files for package } // Check that the queried file appears in the package: // it might be a '// +build ignore' from an ad-hoc main // package, e.g. $GOROOT/src/net/http/triv.go. if !pkgContainsFile(bp, fqpos.fset.File(fqpos.start).Name()) { return // not found } conf.TypeCheckFuncBodies = func(p string) bool { return p == importPath } // Ignore packages specified on command line. conf.CreatePkgs = nil conf.ImportPkgs = nil // Instead load just the one containing the query position // (and possibly its corresponding tests/production code). // TODO(adonovan): set 'augment' based on which file list // contains conf.ImportWithTests(importPath) }