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run.go
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run.go
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package main
import (
"context"
"encoding/json"
"errors"
"fmt"
"io"
"os"
"os/exec"
"path/filepath"
"slices"
"strings"
"github.com/spf13/cobra"
)
var (
runVersionArg string
runVerboseArg bool
)
var RunCmd = &cobra.Command{
Use: "run [node|npm|npx|corepack]",
Short: "Run command(node, npm or npx)",
Args: cobra.MinimumNArgs(1),
Run: func(cmd *cobra.Command, args []string) {
verbose = runVerboseArg
command := args[0]
if !slices.Contains([]string{"node", "npm", "npx", "corepack"}, command) {
cmd.Usage()
os.Exit(1)
}
var commandArgs []string
if len(args) > 1 {
commandArgs = args[1:]
}
if err := Run(cmd.Context(), runVersionArg, command, commandArgs); err != nil {
var extErr *exec.ExitError
if errors.As(err, &extErr) {
os.Exit(extErr.ExitCode())
} else if errors.Is(err, ErrNotFoundGlobalVersion) {
fatal(cmd.Context(), fmt.Errorf("no specify version. Run `nvs use`"))
} else {
fatal(cmd.Context(), err)
}
}
},
}
func init() {
RunCmd.Flags().StringVar(&runVersionArg, "version", autoVersion, "specify running version")
RunCmd.Flags().BoolVarP(&runVerboseArg, "verbose", "v", false, "output verbose")
}
const autoVersion = "auto"
var ErrNotFoundGlobalVersion = fmt.Errorf("not found global version")
func decideVersion(ctx context.Context, baseDir string) (string, error) {
globalVersion := func() (string, error) {
v, err := os.ReadFile(filepath.Join(baseDir, globalVersionFile))
if err != nil {
if os.IsNotExist(err) {
return "", ErrNotFoundGlobalVersion
}
return "", err
}
return string(v), nil
}
var (
priority int
primaryVersion string
)
for dir := "."; ; dir = filepath.Join("..", dir) {
directory, err := filepath.Abs(dir)
if err != nil {
debugf(ctx, "get %s abs: %v", dir, err)
return globalVersion()
}
if nodeVersionFile, err := os.Open(filepath.Join(directory, ".node-version")); err == nil {
debugf(ctx, "use .node-version")
b, err := io.ReadAll(nodeVersionFile)
if err != nil {
return "", err
}
v := strings.TrimRight(string(b), "\n")
if priority > 0 {
curPriority := calcPriority(strings.Split(v, "."))
if curPriority > priority {
return v, nil
}
continue
}
return strings.TrimRight(string(b), "\n"), nil
}
if packageFile, err := os.Open(filepath.Join(directory, "package.json")); err == nil {
debugf(ctx, "parse package.json")
var packageJson struct {
Engines struct {
Node string `json:"node"`
} `json:"engines"`
}
if err := json.NewDecoder(packageFile).Decode(&packageJson); err != nil {
return "", err
}
if node := packageJson.Engines.Node; node != "" {
if strings.Contains(node, "||") {
node = strings.TrimSpace(strings.Split(node, "||")[0])
}
if strings.HasPrefix(node, ">") {
splits := strings.Split(strings.TrimLeft(node, ">="), ".")
if len(splits) > 3 {
continue
}
curPriority := calcPriority(splits)
if curPriority > priority {
primaryVersion = node
priority = curPriority
}
} else {
return node, nil
}
}
}
if directory == "/" {
v, err := globalVersion()
if err != nil {
return "", err
}
if priority > 0 {
curPriority := calcPriority(strings.Split(v, "."))
if curPriority < priority {
return primaryVersion, nil
}
}
return v, nil
}
}
}
func Run(ctx context.Context, versionStr string, command string, args []string) error {
baseDir, err := checkInit()
if err != nil {
return err
}
var parsedVersion *version
if versionStr != autoVersion {
parsedVersion, err = parseVersionString(versionStr)
if err != nil {
return err
}
} else {
versionStr, err = decideVersion(ctx, baseDir)
if err != nil {
return err
}
parsedVersion, err = parseVersionString(versionStr)
if err != nil {
return err
}
}
nodeBasePath, err := findLocalVersion(baseDir, parsedVersion)
if err != nil {
if errors.Is(err, ErrNotFoundLocalVersion) {
warnf(ctx, "download %s version", versionStr)
if err := Download(ctx, parsedVersion); err != nil {
return err
}
nodeBasePath, err = findLocalVersion(baseDir, parsedVersion)
if err != nil {
return err
}
} else {
return err
}
}
debugf(ctx, "use %s", nodeBasePath)
if command != "node" {
args = slices.Concat([]string{filepath.Join(baseDir, "versions", nodeBasePath, "bin", command)}, args)
}
cmd := exec.CommandContext(ctx, filepath.Join(baseDir, "versions", nodeBasePath, "bin", "node"), args...)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
if err := cmd.Start(); err != nil {
return err
}
if err := cmd.Wait(); err != nil {
return err
}
return nil
}
type localFile struct {
name string
priority int
}
var ErrNotFoundLocalVersion = fmt.Errorf("not found local nodejs")
func findLocalVersion(baseDir string, v *version) (string, error) {
files, err := os.ReadDir(filepath.Join(baseDir, "versions"))
if err != nil {
return "", err
}
var matchFiles []localFile
for _, file := range files {
splitName := strings.Split(strings.TrimLeft(filepath.Base(file.Name()), "v"), ".")
match, err := compareVersionString(splitName, v)
if err != nil {
return "", err
}
if match {
matchFiles = append(matchFiles, localFile{
name: file.Name(),
priority: calcPriority(splitName),
})
}
}
if len(matchFiles) == 0 {
return "", ErrNotFoundLocalVersion
}
slices.SortFunc(matchFiles, func(l, r localFile) int {
return r.priority - l.priority
})
return matchFiles[0].name, nil
}