fix: windows compilation (#1101)

Original pull request: https://code.forgejo.org/forgejo/runner/pulls/987
Fixes https://code.forgejo.org/forgejo/runner/issues/1032

<!--start release-notes-assistant-->
<!--URL:https://code.forgejo.org/forgejo/runner-->
- bug fixes
  - [PR](https://code.forgejo.org/forgejo/runner/pulls/1101): <!--number 1101 --><!--line 0 --><!--description Zml4OiB3aW5kb3dzIGNvbXBpbGF0aW9u-->fix: windows compilation<!--description-->
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Reviewed-on: https://code.forgejo.org/forgejo/runner/pulls/1101
Reviewed-by: earl-warren <earl-warren@noreply.code.forgejo.org>
Co-authored-by: volkmnv <volkmnv@noreply.code.forgejo.org>
Co-committed-by: volkmnv <volkmnv@noreply.code.forgejo.org>

act/artifactcache/handler.go

@@ -9,7 +9,6 @@ import (
 	"net/http"
 	"strconv"
 	"strings"
-	"syscall"
 	"time"
 
 	"github.com/julienschmidt/httprouter"
@@ -25,7 +24,7 @@ const (
 
 var fatal = func(logger logrus.FieldLogger, err error) {
 	logger.Errorf("unrecoverable error in the cache: %v", err)
-	if err := syscall.Kill(syscall.Getpid(), syscall.SIGTERM); err != nil {
+	if err := suicide(); err != nil {
 		logger.Errorf("unrecoverable error in the cache: failed to send the TERM signal to shutdown the daemon %v", err)
 	}
 }

act/artifactcache/utils.go

@@ -0,0 +1,9 @@
+//go:build !windows
+
+package artifactcache
+
+import "syscall"
+
+func suicide() error {
+	return syscall.Kill(syscall.Getpid(), syscall.SIGTERM)
+}

act/artifactcache/utils_windows.go

@@ -0,0 +1,14 @@
+//go:build windows
+
+package artifactcache
+
+import "syscall"
+
+func suicide() error {
+	handle, err := syscall.GetCurrentProcess()
+	if err != nil {
+		return err
+	}
+
+	return syscall.TerminateProcess(handle, uint32(syscall.SIGTERM))
+}