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winget.go
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winget.go
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package wingetsvc
import (
"bytes"
"context"
"fmt"
"io"
"os"
"path/filepath"
"runtime"
"strings"
"log/slog"
)
type ServiceInfo struct {
Id string `json:"id,omitempty"`
Name string `json:"name,omitempty"`
Version string `json:"version,omitempty"`
}
type WingetController interface {
Search(ctx context.Context, term string) ([]ServiceInfo, error)
Versions(ctx context.Context, packageId string) ([]string, error)
}
func NewWingetController(logger *slog.Logger) WingetController {
var controller WingetController
if runtime.GOOS == "windows" {
controller = &windowsController{}
} else {
controller = &noopController{}
}
return loggingControllerMiddleware(logger, controller)
}
type noopController struct{}
func (c *noopController) Search(ctx context.Context, term string) ([]ServiceInfo, error) {
return nil, nil
}
func (c *noopController) Versions(ctx context.Context, packageId string) ([]string, error) {
return nil, nil
}
type windowsController struct{}
func (c *windowsController) Search(ctx context.Context, term string) ([]ServiceInfo, error) {
output, err := c.call(ctx, "search", term)
if err != nil {
return nil, err
}
return parseSearchOutput(output)
}
func (c *windowsController) call(ctx context.Context, args ...string) ([]byte, error) {
wingetPath := filepath.Join(
os.Getenv("LOCALAPPDATA"),
"\\Microsoft\\WindowsApps\\winget.exe",
)
r, w, _ := os.Pipe()
attrs := &os.ProcAttr{
Files: []*os.File{nil, w, os.Stderr},
}
proc, err := os.StartProcess(wingetPath, append([]string{wingetPath}, args...), attrs)
if err != nil {
return nil, fmt.Errorf("StartProcess() failed: %w", err)
}
state, err := proc.Wait()
if err != nil {
return nil, fmt.Errorf("Wait() failed: %w", err)
}
w.Close()
bb := &bytes.Buffer{}
io.Copy(bb, r)
if state.ExitCode() != 0 {
return nil, fmt.Errorf(strings.TrimPrefix(strings.TrimSpace(bb.String()), "\b-\b \r"))
}
return bb.Bytes(), nil
}
func (c *windowsController) Versions(ctx context.Context, packageId string) ([]string, error) {
output, err := c.call(ctx, "show", packageId, "--versions")
if err != nil {
return nil, err
}
return parseVersionsOutput(output)
}
func loggingControllerMiddleware(logger *slog.Logger, next WingetController) WingetController {
return &loggingControllerMw{
logger: logger,
next: next,
}
}
type loggingControllerMw struct {
logger *slog.Logger
next WingetController
}
func (c *loggingControllerMw) Search(ctx context.Context, term string) (records []ServiceInfo, err error) {
defer func() {
c.logger.Info("Search called", "term", term, "records", len(records), "failure", bool(err != nil))
}()
records, err = c.next.Search(ctx, term)
return
}
func (c *loggingControllerMw) Versions(ctx context.Context, packageId string) (records []string, err error) {
defer func() {
c.logger.Info("Search called", "packageId", packageId, "records", len(records), "failure", bool(err != nil))
}()
records, err = c.next.Versions(ctx, packageId)
return
}