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package cmd
import (
"bufio"
"context"
"fmt"
"io/ioutil"
"os"
"os/exec"
"gotest.tools/gotestsum/internal/filewatcher"
"gotest.tools/gotestsum/testjson"
)
func runWatcher(opts *options) error {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
w := &watchRuns{opts: *opts}
return filewatcher.Watch(ctx, opts.packages, w.run)
}
type watchRuns struct {
opts options
prevExec *testjson.Execution
}
func (w *watchRuns) run(event filewatcher.Event) error {
if event.Debug {
path, cleanup, err := delveInitFile(w.prevExec)
if err != nil {
return fmt.Errorf("failed to write delve init file: %w", err)
}
defer cleanup()
o := delveOpts{
pkgPath: event.PkgPath,
args: w.opts.args,
initFilePath: path,
}
if err := runDelve(o); !IsExitCoder(err) {
return fmt.Errorf("delve failed: %w", err)
}
return nil
}
opts := w.opts // shallow copy opts
opts.packages = append([]string{}, opts.packages...)
opts.packages = append(opts.packages, event.PkgPath)
opts.packages = append(opts.packages, event.Args...)
var err error
if w.prevExec, err = runSingle(&opts); !IsExitCoder(err) {
return err
}
return nil
}
// runSingle is similar to run. It doesn't support rerun-fails. It may be
// possible to share runSingle with run, but the defer close on the handler
// would require at least 3 return values, so for now it is a copy.
func runSingle(opts *options) (*testjson.Execution, error) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
if err := opts.Validate(); err != nil {
return nil, err
}
goTestProc, err := startGoTestFn(ctx, goTestCmdArgs(opts, rerunOpts{}))
if err != nil {
return nil, err
}
handler, err := newEventHandler(opts)
if err != nil {
return nil, err
}
defer handler.Close() // nolint: errcheck
cfg := testjson.ScanConfig{
Stdout: goTestProc.stdout,
Stderr: goTestProc.stderr,
Handler: handler,
Stop: cancel,
}
exec, err := testjson.ScanTestOutput(cfg)
if err != nil {
return exec, finishRun(opts, exec, err)
}
err = goTestProc.cmd.Wait()
return exec, finishRun(opts, exec, err)
}
func delveInitFile(exec *testjson.Execution) (string, func(), error) {
fh, err := ioutil.TempFile("", "gotestsum-delve-init")
if err != nil {
return "", nil, err
}
remove := func() {
os.Remove(fh.Name()) // nolint: errcheck
}
buf := bufio.NewWriter(fh)
for _, tc := range exec.Failed() {
fmt.Fprintf(buf, "break %s\n", tc.Test.Name())
}
buf.WriteString("continue\n")
if err := buf.Flush(); err != nil {
remove()
return "", nil, err
}
return fh.Name(), remove, nil
}
type delveOpts struct {
pkgPath string
args []string
initFilePath string
}
func runDelve(opts delveOpts) error {
pkg := opts.pkgPath
args := []string{"dlv", "test", "--wd", pkg}
args = append(args, "--output", "gotestsum-watch-debug.test")
args = append(args, "--init", opts.initFilePath)
args = append(args, pkg, "--")
args = append(args, opts.args...)
cmd := exec.Command(args[0], args[1:]...)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
return cmd.Run()
}
|
