124 lines
3.4 KiB
Go
124 lines
3.4 KiB
Go
// Copyright 2016-2017, Pulumi Corporation. All rights reserved.
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package workspace
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"strings"
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"github.com/pulumi/pulumi/pkg/encoding"
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"github.com/pulumi/pulumi/pkg/tokens"
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)
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const ProjectFile = "Pulumi" // the base name of a Project.
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const Dir = ".pulumi" // the default name of the LumiPack output directory.
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const StackDir = "stacks" // the default name of the LumiPack stack directory.
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const DepDir = "packs" // the directory in which dependencies exist, either local or global.
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const SettingsFile = "workspace" // the base name of a markup file for shared settings in a workspace.
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// StackPath returns a path to the given stack's default location.
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func StackPath(stack tokens.QName) string {
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path := filepath.Join(Dir, StackDir)
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if stack != "" {
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path = filepath.Join(path, qnamePath(stack)+encoding.Exts[0])
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}
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return path
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}
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// isTop returns true if the path represents the top of the filesystem.
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func isTop(path string) bool {
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return os.IsPathSeparator(path[len(path)-1])
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}
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// pathDir returns the nearest directory to the given path (identity if a directory; parent otherwise).
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func pathDir(path string) string {
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// It's possible that the path is a file (e.g., a Lumi.yaml file); if so, we want the directory.
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info, err := os.Stat(path)
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if err != nil || info.IsDir() {
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return path
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}
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return filepath.Dir(path)
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}
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// DetectPackage locates the closest package from the given path, searching "upwards" in the directory hierarchy. If no
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// Project is found, an empty path is returned. If problems are detected, they are logged to the diag.Sink.
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func DetectPackage(path string) (string, error) {
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// It's possible the target is already the file we seek; if so, return right away.
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if IsProject(path) {
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return path, nil
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}
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curr := pathDir(path)
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for {
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stop := false
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// Enumerate the current path's files, checking each to see if it's a Project.
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files, err := ioutil.ReadDir(curr)
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if err != nil {
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return "", err
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}
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for _, file := range files {
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name := file.Name()
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path := filepath.Join(curr, name)
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if IsProject(path) {
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return path, nil
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} else if IsLumiDir(path) {
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// If we hit a workspace, stop looking.
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stop = true
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}
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}
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// If we encountered a stop condition, break out of the loop.
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if stop {
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break
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}
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// If neither succeeded, keep looking in our parent directory.
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curr = filepath.Dir(curr)
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if isTop(curr) {
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break
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}
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}
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return "", nil
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}
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// IsLumiDir returns true if the target is a Lumi directory.
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func IsLumiDir(path string) bool {
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info, err := os.Stat(path)
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return err == nil && info.IsDir() && info.Name() == Dir
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}
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// IsProject returns true if the path references what appears to be a valid project. If problems are detected -- like
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// an incorrect extension -- they are logged to the provided diag.Sink (if non-nil).
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func IsProject(path string) bool {
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return isMarkupFile(path, ProjectFile)
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}
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func isMarkupFile(path string, expect string) bool {
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info, err := os.Stat(path)
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if err != nil || info.IsDir() {
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// Missing files and directories can't be markup files.
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return false
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}
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// Ensure the base name is expected.
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name := info.Name()
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ext := filepath.Ext(name)
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base := strings.TrimSuffix(name, ext)
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if base != expect {
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return false
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}
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// Check all supported extensions.
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for _, mext := range encoding.Exts {
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if name == expect+mext {
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return true
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}
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}
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return false
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}
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