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load std package list to check if a package is a really "std" lib #208

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load std package list to check if a package is a really "std" lib #208

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19 changes: 15 additions & 4 deletions output.go
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Original file line number Diff line number Diff line change
Expand Up @@ -9,9 +9,22 @@ import (
"strings"

"golang.org/x/tools/go/callgraph"
"golang.org/x/tools/go/packages"
"golang.org/x/tools/go/ssa"
)

var stdPackages = map[string]struct{}{}

func init() {
pkgs, err := packages.Load(nil, "std")
if err != nil {
panic(err)
}
for _, p := range pkgs {
stdPackages[p.PkgPath] = struct{}{}
}
}

func isSynthetic(edge *callgraph.Edge) bool {
// TODO: consider handling callee.Func.Pkg == nil
// this could still generate a node for the call, might be useful
Expand All @@ -25,10 +38,8 @@ func inStd(node *callgraph.Node) bool {
}

func isStdPkgPath(path string) bool {
if strings.Contains(path, ".") {
return false
}
return true
_, ok := stdPackages[path]
return ok
}

func printOutput(
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