/
plugins.go
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/
plugins.go
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// Copyright 2016-2018, Pulumi Corporation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package workspace
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"os/exec"
"path"
"path/filepath"
"regexp"
"runtime"
"sort"
"strings"
"time"
"github.com/blang/semver"
"github.com/cheggaaa/pb"
"github.com/djherbis/times"
"github.com/pkg/errors"
"github.com/pulumi/pulumi/sdk/v3/go/common/diag/colors"
"github.com/pulumi/pulumi/sdk/v3/go/common/util/archive"
"github.com/pulumi/pulumi/sdk/v3/go/common/util/contract"
"github.com/pulumi/pulumi/sdk/v3/go/common/util/fsutil"
"github.com/pulumi/pulumi/sdk/v3/go/common/util/httputil"
"github.com/pulumi/pulumi/sdk/v3/go/common/util/logging"
"github.com/pulumi/pulumi/sdk/v3/go/common/version"
"github.com/pulumi/pulumi/sdk/v3/nodejs/npm"
"github.com/pulumi/pulumi/sdk/v3/python"
)
const (
windowsGOOS = "windows"
)
var (
enableLegacyPluginBehavior = os.Getenv("PULUMI_ENABLE_LEGACY_PLUGIN_SEARCH") != ""
)
// MissingError is returned by functions that attempt to load plugins if a plugin can't be located.
type MissingError struct {
// Info contains information about the plugin that was not found.
Info PluginInfo
}
// NewMissingError allocates a new error indicating the given plugin info was not found.
func NewMissingError(info PluginInfo) error {
return &MissingError{
Info: info,
}
}
func (err *MissingError) Error() string {
if err.Info.Version != nil {
return fmt.Sprintf("no %[1]s plugin '%[2]s-v%[3]s' found in the workspace or on your $PATH, "+
"install the plugin using `pulumi plugin install %[1]s %[2]s v%[3]s`",
err.Info.Kind, err.Info.Name, err.Info.Version)
}
return fmt.Sprintf("no %s plugin '%s' found in the workspace or on your $PATH",
err.Info.Kind, err.Info.String())
}
// PluginInfo provides basic information about a plugin. Each plugin gets installed into a system-wide
// location, by default `~/.pulumi/plugins/<kind>-<name>-<version>/`. A plugin may contain multiple files,
// however the primary loadable executable must be named `pulumi-<kind>-<name>`.
type PluginInfo struct {
Name string // the simple name of the plugin.
Path string // the path that a plugin was loaded from.
Kind PluginKind // the kind of the plugin (language, resource, etc).
Version *semver.Version // the plugin's semantic version, if present.
Size int64 // the size of the plugin, in bytes.
InstallTime time.Time // the time the plugin was installed.
LastUsedTime time.Time // the last time the plugin was used.
ServerURL string // an optional server to use when downloading this plugin.
PluginDir string // if set, will be used as the root plugin dir instead of ~/.pulumi/plugins.
}
// Dir gets the expected plugin directory for this plugin.
func (info PluginInfo) Dir() string {
dir := fmt.Sprintf("%s-%s", info.Kind, info.Name)
if info.Version != nil {
dir = fmt.Sprintf("%s-v%s", dir, info.Version.String())
}
return dir
}
// File gets the expected filename for this plugin.
func (info PluginInfo) File() string {
return info.FilePrefix() + info.FileSuffix()
}
// FilePrefix gets the expected default file prefix for the plugin.
func (info PluginInfo) FilePrefix() string {
return fmt.Sprintf("pulumi-%s-%s", info.Kind, info.Name)
}
// FileSuffix returns the suffix for the plugin (if any).
func (info PluginInfo) FileSuffix() string {
if runtime.GOOS == windowsGOOS {
return ".exe"
}
return ""
}
// DirPath returns the directory where this plugin should be installed.
func (info PluginInfo) DirPath() (string, error) {
var err error
dir := info.PluginDir
if dir == "" {
dir, err = GetPluginDir()
if err != nil {
return "", err
}
}
return filepath.Join(dir, info.Dir()), nil
}
// LockFilePath returns the full path to the plugin's lock file used during installation
// to prevent concurrent installs.
func (info PluginInfo) LockFilePath() (string, error) {
dir, err := info.DirPath()
if err != nil {
return "", err
}
return fmt.Sprintf("%s.lock", dir), nil
}
// PartialFilePath returns the full path to the plugin's partial file used during installation
// to indicate installation of the plugin hasn't completed yet.
func (info PluginInfo) PartialFilePath() (string, error) {
dir, err := info.DirPath()
if err != nil {
return "", err
}
return fmt.Sprintf("%s.partial", dir), nil
}
// FilePath returns the full path where this plugin's primary executable should be installed.
func (info PluginInfo) FilePath() (string, error) {
dir, err := info.DirPath()
if err != nil {
return "", err
}
return filepath.Join(dir, info.File()), nil
}
// Delete removes the plugin from the cache. It also deletes any supporting files in the cache, which includes
// any files that contain the same prefix as the plugin itself.
func (info PluginInfo) Delete() error {
dir, err := info.DirPath()
if err != nil {
return err
}
if err := os.RemoveAll(dir); err != nil {
return err
}
// Attempt to delete any leftover .partial or .lock files.
// Don't fail the operation if we can't delete these.
contract.IgnoreError(os.Remove(fmt.Sprintf("%s.partial", dir)))
contract.IgnoreError(os.Remove(fmt.Sprintf("%s.lock", dir)))
return nil
}
// SetFileMetadata adds extra metadata from the given file, representing this plugin's directory.
func (info *PluginInfo) SetFileMetadata(path string) error {
// Get the file info.
file, err := os.Stat(path)
if err != nil {
return err
}
// Next, get the size from the directory (or, if there is none, just the file).
size, err := getPluginSize(path)
if err != nil {
return errors.Wrapf(err, "getting plugin dir %s size", path)
}
info.Size = size
// Next get the access times from the plugin binary itself.
tinfo := times.Get(file)
if tinfo.HasBirthTime() {
info.InstallTime = tinfo.BirthTime()
}
info.LastUsedTime = tinfo.AccessTime()
return nil
}
// Download fetches an io.ReadCloser for this plugin and also returns the size of the response (if known).
func (info PluginInfo) Download() (io.ReadCloser, int64, error) {
// Figure out the OS/ARCH pair for the download URL.
var os string
switch runtime.GOOS {
case "darwin", "linux", "windows":
os = runtime.GOOS
default:
return nil, -1, errors.Errorf("unsupported plugin OS: %s", runtime.GOOS)
}
var arch string
switch runtime.GOARCH {
case "amd64", "arm64":
arch = runtime.GOARCH
default:
return nil, -1, errors.Errorf("unsupported plugin architecture: %s", runtime.GOARCH)
}
// If the plugin has a server, associated with it, download from there. Otherwise use the "default" location, which
// is hosted by Pulumi.
serverURL := info.ServerURL
if serverURL == "" {
serverURL = "https://get.pulumi.com/releases/plugins"
}
serverURL = strings.TrimSuffix(serverURL, "/")
logging.V(1).Infof("%s downloading from %s", info.Name, serverURL)
// URL escape the path value to ensure we have the correct path for S3/CloudFront.
endpoint := fmt.Sprintf("%s/%s",
serverURL,
url.QueryEscape(fmt.Sprintf("pulumi-%s-%s-v%s-%s-%s.tar.gz", info.Kind, info.Name, info.Version, os, arch)))
logging.V(9).Infof("full plugin download url: %s", endpoint)
req, err := http.NewRequest("GET", endpoint, nil)
if err != nil {
return nil, -1, err
}
userAgent := fmt.Sprintf("pulumi-cli/1 (%s; %s)", version.Version, runtime.GOOS)
req.Header.Set("User-Agent", userAgent)
logging.V(9).Infof("plugin install request headers: %v", req.Header)
resp, err := httputil.DoWithRetry(req, http.DefaultClient)
if err != nil {
return nil, -1, err
}
logging.V(9).Infof("plugin install response headers: %v", resp.Header)
if resp.StatusCode < 200 || resp.StatusCode > 299 {
return nil, -1, errors.Errorf("%d HTTP error fetching plugin from %s", resp.StatusCode, endpoint)
}
return resp.Body, resp.ContentLength, nil
}
// installLock acquires a file lock used to prevent concurrent installs.
func (info PluginInfo) installLock() (unlock func(), err error) {
finalDir, err := info.DirPath()
if err != nil {
return nil, err
}
lockFilePath := fmt.Sprintf("%s.lock", finalDir)
if err := os.MkdirAll(filepath.Dir(lockFilePath), 0700); err != nil {
return nil, errors.Wrap(err, "creating plugin root")
}
mutex := fsutil.NewFileMutex(lockFilePath)
if err := mutex.Lock(); err != nil {
return nil, err
}
return func() {
contract.IgnoreError(mutex.Unlock())
}, nil
}
// Install installs a plugin's tarball into the cache. It validates that plugin names are in the expected format.
// Previous versions of Pulumi extracted the tarball to a temp directory first, and then renamed the temp directory
// to the final directory. The rename operation fails often enough on Windows due to aggressive virus scanners opening
// files in the temp directory. To address this, we now extract the tarball directly into the final directory, and use
// file locks to prevent concurrent installs.
// Each plugin has its own file lock, with the same name as the plugin directory, with a `.lock` suffix.
// During installation an empty file with a `.partial` suffix is created, indicating that installation is in-progress.
// The `.partial` file is deleted when installation is complete, indicating that the plugin has finished installing.
// If a failure occurs during installation, the `.partial` file will remain, indicating the plugin wasn't fully
// installed. The next time the plugin is installed, the old installation directory will be removed and replaced with
// a fresh install.
func (info PluginInfo) Install(tgz io.ReadCloser) error {
defer contract.IgnoreClose(tgz)
// Fetch the directory into which we will expand this tarball.
finalDir, err := info.DirPath()
if err != nil {
return err
}
// Create a file lock file at <pluginsdir>/<kind>-<name>-<version>.lock.
unlock, err := info.installLock()
if err != nil {
return err
}
defer unlock()
// Cleanup any temp dirs from failed installations of this plugin from previous versions of Pulumi.
if err := cleanupTempDirs(finalDir); err != nil {
// We don't want to fail the installation if there was an error cleaning up these old temp dirs.
// Instead, log the error and continue on.
logging.V(5).Infof("Install: Error cleaning up temp dirs: %s", err.Error())
}
// Get the partial file path (e.g. <pluginsdir>/<kind>-<name>-<version>.partial).
partialFilePath, err := info.PartialFilePath()
if err != nil {
return err
}
// Check whether the directory exists while we were waiting on the lock.
_, finalDirStatErr := os.Stat(finalDir)
if finalDirStatErr == nil {
_, partialFileStatErr := os.Stat(partialFilePath)
if partialFileStatErr != nil {
if os.IsNotExist(partialFileStatErr) {
// finalDir exists and there's no partial file, so the plugin is already installed.
return nil
}
return partialFileStatErr
}
// The partial file exists, meaning a previous attempt at installing the plugin failed.
// Delete finalDir so we can try installing again. There's no need to delete the partial
// file since we'd just be recreating it again below anyway.
if err := os.RemoveAll(finalDir); err != nil {
return err
}
} else if !os.IsNotExist(finalDirStatErr) {
return finalDirStatErr
}
// Create an empty partial file to indicate installation is in-progress.
if err := ioutil.WriteFile(partialFilePath, nil, 0600); err != nil {
return err
}
// Create the final directory.
if err := os.MkdirAll(finalDir, 0700); err != nil {
return err
}
// Uncompress the plugin.
if err := archive.ExtractTGZ(tgz, finalDir); err != nil {
return err
}
// Even though we deferred closing the tarball at the beginning of this function, go ahead and explicitly close
// it now since we're finished extracting it, to prevent subsequent output from being displayed oddly with
// the progress bar.
contract.IgnoreClose(tgz)
// Install dependencies, if needed.
proj, err := LoadPluginProject(filepath.Join(finalDir, "PulumiPlugin.yaml"))
if err != nil && !os.IsNotExist(err) {
return errors.Wrap(err, "loading PulumiPlugin.yaml")
}
if proj != nil {
runtime := strings.ToLower(proj.Runtime.Name())
// For now, we only do this for Node.js and Python. For Go, the expectation is the binary is
// already built. For .NET, similarly, a single self-contained binary could be used, but
// otherwise `dotnet run` will implicitly run `dotnet restore`.
// TODO[pulumi/pulumi#1334]: move to the language plugins so we don't have to hard code here.
switch runtime {
case "nodejs":
var b bytes.Buffer
if _, err := npm.Install(finalDir, true /* production */, &b, &b); err != nil {
os.Stderr.Write(b.Bytes())
return errors.Wrap(err, "installing plugin dependencies")
}
case "python":
if err := python.InstallDependencies(finalDir, "venv", false /*showOutput*/); err != nil {
return errors.Wrap(err, "installing plugin dependencies")
}
}
}
// Installation is complete. Remove the partial file.
return os.Remove(partialFilePath)
}
// cleanupTempDirs cleans up leftover temp dirs from failed installs with previous versions of Pulumi.
func cleanupTempDirs(finalDir string) error {
dir := filepath.Dir(finalDir)
infos, err := ioutil.ReadDir(dir)
if err != nil {
return err
}
for _, info := range infos {
// Temp dirs have a suffix of `.tmpXXXXXX` (where `XXXXXX`) is a random number,
// from ioutil.TempFile.
if info.IsDir() && installingPluginRegexp.MatchString(info.Name()) {
path := filepath.Join(dir, info.Name())
if err := os.RemoveAll(path); err != nil {
return errors.Wrapf(err, "cleaning up temp dir %s", path)
}
}
}
return nil
}
func (info PluginInfo) String() string {
var version string
if v := info.Version; v != nil {
version = fmt.Sprintf("-%s", v)
}
return info.Name + version
}
// PluginKind represents a kind of a plugin that may be dynamically loaded and used by Pulumi.
type PluginKind string
const (
// AnalyzerPlugin is a plugin that can be used as a resource analyzer.
AnalyzerPlugin PluginKind = "analyzer"
// LanguagePlugin is a plugin that can be used as a language host.
LanguagePlugin PluginKind = "language"
// ResourcePlugin is a plugin that can be used as a resource provider for custom CRUD operations.
ResourcePlugin PluginKind = "resource"
)
// IsPluginKind returns true if k is a valid plugin kind, and false otherwise.
func IsPluginKind(k string) bool {
switch PluginKind(k) {
case AnalyzerPlugin, LanguagePlugin, ResourcePlugin:
return true
default:
return false
}
}
// HasPlugin returns true if the given plugin exists.
func HasPlugin(plug PluginInfo) bool {
dir, err := plug.DirPath()
if err == nil {
_, err := os.Stat(dir)
if err == nil {
partialFilePath, err := plug.PartialFilePath()
if err == nil {
if _, err := os.Stat(partialFilePath); os.IsNotExist(err) {
return true
}
}
}
}
return false
}
// HasPluginGTE returns true if the given plugin exists at the given version number or greater.
func HasPluginGTE(plug PluginInfo) (bool, error) {
// If an exact match, return true right away.
if HasPlugin(plug) {
return true, nil
}
// Otherwise, load up the list of plugins and find one with the same name/type and >= version.
plugs, err := GetPlugins()
if err != nil {
return false, err
}
// If we're not doing the legacy plugin behavior and we've been asked for a specific version, do the same plugin
// search that we'd do at runtime. This ensures that `pulumi plugin install` works the same way that the runtime
// loader does, to minimize confusion when a user has to install new plugins.
if !enableLegacyPluginBehavior && plug.Version != nil {
requestedVersion := semver.MustParseRange(plug.Version.String())
_, err := SelectCompatiblePlugin(plugs, plug.Kind, plug.Name, requestedVersion)
return err == nil, err
}
for _, p := range plugs {
if p.Name == plug.Name &&
p.Kind == plug.Kind &&
(p.Version != nil && plug.Version != nil && p.Version.GTE(*plug.Version)) {
return true, nil
}
}
return false, nil
}
// GetPolicyDir returns the directory in which an organization's Policy Packs on the current machine are managed.
func GetPolicyDir(orgName string) (string, error) {
return GetPulumiPath(PolicyDir, orgName)
}
// GetPolicyPath finds a PolicyPack by its name version, as well as a bool marked true if the path
// already exists and is a directory.
func GetPolicyPath(orgName, name, version string) (string, bool, error) {
policiesDir, err := GetPolicyDir(orgName)
if err != nil {
return "", false, err
}
policyPackPath := path.Join(policiesDir, fmt.Sprintf("pulumi-analyzer-%s-v%s", name, version))
file, err := os.Stat(policyPackPath)
if err == nil && file.IsDir() {
// PolicyPack exists. Return.
return policyPackPath, true, nil
} else if err != nil && !os.IsNotExist(err) {
// Error trying to inspect PolicyPack FS entry. Return error.
return "", false, err
}
// Not found. Return empty path.
return policyPackPath, false, nil
}
// GetPluginDir returns the directory in which plugins on the current machine are managed.
func GetPluginDir() (string, error) {
return GetPulumiPath(PluginDir)
}
// GetPlugins returns a list of installed plugins without size info and last accessed metadata.
// Plugin size requires recursively traversing the plugin directory, which can be extremely
// expensive with the introduction of nodejs multilang components that have
// deeply nested node_modules folders.
func GetPlugins() ([]PluginInfo, error) {
// To get the list of plugins, simply scan the directory in the usual place.
dir, err := GetPluginDir()
if err != nil {
return nil, err
}
return getPlugins(dir, true /* skipMetadata */)
}
// GetPluginsWithMetadata returns a list of installed plugins with metadata about size,
// and last access (POOR RUNTIME PERF). Plugin size requires recursively traversing the
// plugin directory, which can be extremely expensive with the introduction of
// nodejs multilang components that have deeply nested node_modules folders.
func GetPluginsWithMetadata() ([]PluginInfo, error) {
// To get the list of plugins, simply scan the directory in the usual place.
dir, err := GetPluginDir()
if err != nil {
return nil, err
}
return getPlugins(dir, false /* skipMetadata */)
}
func getPlugins(dir string, skipMetadata bool) ([]PluginInfo, error) {
files, err := ioutil.ReadDir(dir)
if err != nil {
if os.IsNotExist(err) {
return nil, nil
}
return nil, err
}
// Now read the file infos and create the plugin infos.
var plugins []PluginInfo
for _, file := range files {
// Skip anything that doesn't look like a plugin.
if kind, name, version, ok := tryPlugin(file); ok {
plugin := PluginInfo{
Name: name,
Kind: kind,
Version: &version,
}
path := filepath.Join(dir, file.Name())
if _, err := os.Stat(fmt.Sprintf("%s.partial", path)); err == nil {
// Skip it if the partial file exists, meaning the plugin is not fully installed.
continue
} else if !os.IsNotExist(err) {
return nil, err
}
// computing plugin sizes can be very expensive (nested node_modules)
if !skipMetadata {
if err = plugin.SetFileMetadata(path); err != nil {
return nil, err
}
}
plugins = append(plugins, plugin)
}
}
return plugins, nil
}
// GetPluginPath finds a plugin's path by its kind, name, and optional version. It will match the latest version that
// is >= the version specified. If no version is supplied, the latest plugin for that given kind/name pair is loaded,
// using standard semver sorting rules. A plugin may be overridden entirely by placing it on your $PATH, though it is
// possible to opt out of this behavior by setting PULUMI_IGNORE_AMBIENT_PLUGINS to any non-empty value.
func GetPluginPath(kind PluginKind, name string, version *semver.Version) (string, string, error) {
var filename string
// If we have a version of the plugin on its $PATH, use it, unless we have opted out of this behavior explicitly.
// This supports development scenarios.
if _, isFound := os.LookupEnv("PULUMI_IGNORE_AMBIENT_PLUGINS"); !isFound {
filename = (&PluginInfo{Kind: kind, Name: name, Version: version}).FilePrefix()
if path, err := exec.LookPath(filename); err == nil {
logging.V(6).Infof("GetPluginPath(%s, %s, %v): found on $PATH %s", kind, name, version, path)
return "", path, nil
}
}
// At some point in the future, language plugins will be located in the plugin cache, just like regular plugins
// (see pulumi/pulumi#956 for some of the reasons why this isn't the case today). For now, they ship next to the
// `pulumi` binary. While we encourage this folder to be on the $PATH (and so the check above would have found
// the language plugin) it's possible someone is running `pulumi` with an explicit path on the command line or
// has done symlink magic such that `pulumi` is on the path, but the language plugins are not. So, if possible,
// look next to the instance of `pulumi` that is running to find this language plugin.
if kind == LanguagePlugin {
exePath, exeErr := os.Executable()
if exeErr == nil {
fullPath, fullErr := filepath.EvalSymlinks(exePath)
if fullErr == nil {
for _, ext := range getCandidateExtensions() {
candidate := filepath.Join(filepath.Dir(fullPath), filename+ext)
// Let's see if the file is executable. On Windows, os.Stat() returns a mode of "-rw-rw-rw" so on
// on windows we just trust the fact that the .exe can actually be launched.
if stat, err := os.Stat(candidate); err == nil &&
(stat.Mode()&0100 != 0 || runtime.GOOS == windowsGOOS) {
logging.V(6).Infof("GetPluginPath(%s, %s, %v): found next to current executable %s",
kind, name, version, candidate)
return "", candidate, nil
}
}
}
}
}
// Otherwise, check the plugin cache.
plugins, err := GetPlugins()
if err != nil {
return "", "", errors.Wrapf(err, "loading plugin list")
}
var match *PluginInfo
if !enableLegacyPluginBehavior && version != nil {
logging.V(6).Infof("GetPluginPath(%s, %s, %s): enabling new plugin behavior", kind, name, version)
candidate, err := SelectCompatiblePlugin(plugins, kind, name, semver.MustParseRange(version.String()))
if err != nil {
return "", "", NewMissingError(PluginInfo{
Name: name,
Kind: kind,
Version: version,
})
}
match = &candidate
} else {
for _, cur := range plugins {
// Since the value of cur changes as we iterate, we can't save a pointer to it. So let's have a local that
// we can take a pointer to if this plugin is the best match yet.
plugin := cur
if plugin.Kind == kind && plugin.Name == name {
// Always pick the most recent version of the plugin available. Even if this is an exact match, we
// keep on searching just in case there's a newer version available.
var m *PluginInfo
if match == nil && version == nil {
m = &plugin // no existing match, no version spec, take it.
} else if match != nil &&
(match.Version == nil || (plugin.Version != nil && plugin.Version.GT(*match.Version))) {
m = &plugin // existing match, but this plugin is newer, prefer it.
} else if version != nil && plugin.Version != nil && plugin.Version.GTE(*version) {
m = &plugin // this plugin is >= the version being requested, use it.
}
if m != nil {
match = m
logging.V(6).Infof("GetPluginPath(%s, %s, %s): found candidate (#%s)",
kind, name, version, match.Version)
}
}
}
}
if match != nil {
matchDir, err := match.DirPath()
if err != nil {
return "", "", err
}
matchPath, err := match.FilePath()
if err != nil {
return "", "", err
}
logging.V(6).Infof("GetPluginPath(%s, %s, %v): found in cache at %s", kind, name, version, matchPath)
return matchDir, matchPath, nil
}
return "", "", nil
}
// SortedPluginInfo is a wrapper around PluginInfo that allows for sorting by version.
type SortedPluginInfo []PluginInfo
func (sp SortedPluginInfo) Len() int { return len(sp) }
func (sp SortedPluginInfo) Less(i, j int) bool {
iVersion := sp[i].Version
jVersion := sp[j].Version
switch {
case iVersion == nil && jVersion == nil:
return false
case iVersion == nil:
return true
case jVersion == nil:
return false
default:
return iVersion.LT(*jVersion)
}
}
func (sp SortedPluginInfo) Swap(i, j int) { sp[i], sp[j] = sp[j], sp[i] }
// SelectCompatiblePlugin selects a plugin from the list of plugins with the given kind and name that sastisfies the
// requested semver range. It returns the highest version plugin that satisfies the requested constraints, or an error
// if no such plugin could be found.
//
// If there exist plugins in the plugin list that don't have a version, SelectCompatiblePlugin will select them if there
// are no other compatible plugins available.
func SelectCompatiblePlugin(
plugins []PluginInfo, kind PluginKind, name string, requested semver.Range) (PluginInfo, error) {
logging.V(7).Infof("SelectCompatiblePlugin(..., %s): beginning", name)
var bestMatch PluginInfo
var hasMatch bool
// Before iterating over the list of plugins, sort the list of plugins by version in ascending order. This ensures
// that we can do a single pass over the plugin list, from lowest version to greatest version, and be confident that
// the best match that we find at the end is the greatest possible compatible version for the requested plugin.
//
// Plugins without versions are treated as having the lowest version. Ties between plugins without versions are
// resolved arbitrarily.
sort.Sort(SortedPluginInfo(plugins))
for _, plugin := range plugins {
switch {
case plugin.Kind != kind || plugin.Name != name:
// Not the plugin we're looking for.
case !hasMatch && plugin.Version == nil:
// This is the plugin we're looking for, but it doesn't have a version. We haven't seen anything better yet,
// so take it.
logging.V(7).Infof(
"SelectCompatiblePlugin(..., %s): best plugin %s: no version and no other candidates",
name, plugin.String())
hasMatch = true
bestMatch = plugin
case plugin.Version == nil:
// This is a rare case - we've already seen a version-less plugin and we're seeing another here. Ignore this
// one and defer to the one we previously selected.
logging.V(7).Infof("SelectCompatiblePlugin(..., %s): skipping plugin %s: no version", name, plugin.String())
case requested(*plugin.Version):
// This plugin is compatible with the requested semver range. Save it as the best match and continue.
logging.V(7).Infof("SelectCompatiblePlugin(..., %s): best plugin %s: semver match", name, plugin.String())
hasMatch = true
bestMatch = plugin
default:
logging.V(7).Infof(
"SelectCompatiblePlugin(..., %s): skipping plugin %s: semver mismatch", name, plugin.String())
}
}
if !hasMatch {
logging.V(7).Infof("SelectCompatiblePlugin(..., %s): failed to find match", name)
return PluginInfo{}, errors.New("failed to locate compatible plugin")
}
logging.V(7).Infof("SelectCompatiblePlugin(..., %s): selecting plugin '%s': best match ", name, bestMatch.String())
return bestMatch, nil
}
// ReadCloserProgressBar displays a progress bar for the given closer and returns a wrapper closer to manipulate it.
func ReadCloserProgressBar(
closer io.ReadCloser, size int64, message string, colorization colors.Colorization) io.ReadCloser {
if size == -1 {
return closer
}
// If we know the length of the download, show a progress bar.
bar := pb.New(int(size))
bar.Output = os.Stderr
bar.Prefix(colorization.Colorize(colors.SpecUnimportant + message + ":"))
bar.Postfix(colorization.Colorize(colors.Reset))
bar.SetMaxWidth(80)
bar.SetUnits(pb.U_BYTES)
bar.Start()
return &barCloser{
bar: bar,
readCloser: bar.NewProxyReader(closer),
}
}
// getCandidateExtensions returns a set of file extensions (including the dot seprator) which should be used when
// probing for an executable file.
func getCandidateExtensions() []string {
if runtime.GOOS == windowsGOOS {
return []string{".exe", ".cmd"}
}
return []string{""}
}
// pluginRegexp matches plugin directory names: pulumi-KIND-NAME-VERSION.
var pluginRegexp = regexp.MustCompile(
"^(?P<Kind>[a-z]+)-" + // KIND
"(?P<Name>[a-zA-Z0-9-]*[a-zA-Z0-9])-" + // NAME
"v(?P<Version>.*)$") // VERSION
// installingPluginRegexp matches the name of temporary folders. Previous versions of Pulumi first extracted
// plugins to a temporary folder with a suffix of `.tmpXXXXXX` (where `XXXXXX`) is a random number, from
// ioutil.TempFile. We should ignore these folders.
var installingPluginRegexp = regexp.MustCompile(`\.tmp[0-9]+$`)
// tryPlugin returns true if a file is a plugin, and extracts information about it.
func tryPlugin(file os.FileInfo) (PluginKind, string, semver.Version, bool) {
// Only directories contain plugins.
if !file.IsDir() {
logging.V(11).Infof("skipping file in plugin directory: %s", file.Name())
return "", "", semver.Version{}, false
}
// Ignore plugins which are being installed
if installingPluginRegexp.MatchString(file.Name()) {
logging.V(11).Infof("skipping plugin %s which is being installed", file.Name())
return "", "", semver.Version{}, false
}
// Filenames must match the plugin regexp.
match := pluginRegexp.FindStringSubmatch(file.Name())
if len(match) != len(pluginRegexp.SubexpNames()) {
logging.V(11).Infof("skipping plugin %s with missing capture groups: expect=%d, actual=%d",
file.Name(), len(pluginRegexp.SubexpNames()), len(match))
return "", "", semver.Version{}, false
}
var kind PluginKind
var name string
var version *semver.Version
for i, group := range pluginRegexp.SubexpNames() {
v := match[i]
switch group {
case "Kind":
// Skip invalid kinds.
if IsPluginKind(v) {
kind = PluginKind(v)
} else {
logging.V(11).Infof("skipping invalid plugin kind: %s", v)
}
case "Name":
name = v
case "Version":
// Skip invalid versions.
ver, err := semver.ParseTolerant(v)
if err == nil {
version = &ver
} else {
logging.V(11).Infof("skipping invalid plugin version: %s", v)
}
}
}
// If anything was missing or invalid, skip this plugin.
if kind == "" || name == "" || version == nil {
logging.V(11).Infof("skipping plugin with missing information: kind=%s, name=%s, version=%v",
kind, name, version)
return "", "", semver.Version{}, false
}
return kind, name, *version, true
}
// getPluginSize recursively computes how much space is devoted to a given plugin.
func getPluginSize(path string) (int64, error) {
file, err := os.Stat(path)
if err != nil {
return 0, nil
}
size := int64(0)
if file.IsDir() {
subs, err := ioutil.ReadDir(path)
if err != nil {
return 0, err
}
for _, child := range subs {
add, err := getPluginSize(filepath.Join(path, child.Name()))
if err != nil {
return 0, err
}
size += add
}
} else {
size += file.Size()
}
return size, nil
}
type barCloser struct {
bar *pb.ProgressBar
readCloser io.ReadCloser
}
func (bc *barCloser) Read(dest []byte) (int, error) {
return bc.readCloser.Read(dest)
}
func (bc *barCloser) Close() error {
bc.bar.Finish()
return bc.readCloser.Close()
}