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packages.go
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packages.go
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// Copyright 2022 Namespace Labs Inc; All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
package gosupport
import (
"fmt"
"os"
"path/filepath"
"golang.org/x/mod/modfile"
"namespacelabs.dev/foundation/internal/findroot"
"namespacelabs.dev/foundation/internal/fnerrors"
)
func ComputeGoPackage(parentPath string) (string, error) {
f, gomodFile, err := LookupGoModule(parentPath)
if err != nil {
return "", err
}
rel, err := filepath.Rel(filepath.Dir(gomodFile), parentPath)
if err != nil {
return "", err
}
return fmt.Sprintf("%s/%s", f.Module.Mod.Path, rel), nil
}
func LookupGoModule(srcPath string) (*modfile.File, string, error) {
gomodDir, err := findroot.Find("go module", srcPath, findroot.LookForFile("go.mod"))
if err != nil {
return nil, "", err
}
gomodFile := filepath.Join(gomodDir, "go.mod")
gomodBytes, err := os.ReadFile(gomodFile)
if err != nil {
return nil, gomodFile, err
}
f, err := modfile.Parse(gomodFile, gomodBytes, nil)
if err != nil {
return nil, gomodFile, err
}
if f.Module == nil {
return nil, gomodFile, fnerrors.New("%s: missing go module definition", gomodFile)
}
return f, gomodFile, nil
}