57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
// Copyright 2018, Pulumi Corporation. All rights reserved.
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package engine
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import (
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"os"
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"path"
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"path/filepath"
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"strings"
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"github.com/pkg/errors"
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"github.com/pulumi/pulumi/pkg/workspace"
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)
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type Projinfo struct {
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Proj *workspace.Project
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Root string
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}
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// GetPwdMain returns the working directory and main entrypoint to use for this package.
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func (projinfo *Projinfo) GetPwdMain() (string, string, error) {
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pwd := projinfo.Root
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main := projinfo.Proj.Main
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if main == "" {
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main = "."
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} else {
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// The path must be relative from the package root.
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if filepath.IsAbs(main) {
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return "", "", errors.New("project 'main' must be a relative path")
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}
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// Check that main is a subdirectory.
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cleanPwd := filepath.Clean(pwd)
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main = filepath.Clean(path.Join(cleanPwd, main))
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if !strings.HasPrefix(main, cleanPwd) {
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return "", "", errors.New("project 'main' must be a subfolder")
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}
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// So that any relative paths inside of the program are correct, we still need to pass the pwd
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// of the main program's parent directory. How we do this depends on if the target is a dir or not.
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maininfo, err := os.Stat(main)
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if err != nil {
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return "", "", errors.Wrapf(err, "project 'main' could not be read")
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}
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if maininfo.IsDir() {
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pwd = main
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main = "."
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} else {
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pwd = filepath.Dir(main)
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main = filepath.Base(main)
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}
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}
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return pwd, main, nil
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}
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