ci: prepare syso files for windows embedding in release (#6406)

* prepare syso files for windows embedding

* don't specify main so version info will be embedded correctly

---------

Co-authored-by: Mohammed Al Sahaf <msaa1990@gmail.com>

.goreleaser.yml

@@ -12,6 +12,10 @@ before:
     - mkdir -p caddy-build
     - cp cmd/caddy/main.go caddy-build/main.go
     - /bin/sh -c 'cd ./caddy-build && go mod init caddy'
+    # prepare syso files for windows embedding
+    - go install github.com/caddyserver/xcaddy/cmd/xcaddy@latest
+    - /bin/sh -c 'for a in amd64 arm arm64; do XCADDY_SKIP_BUILD=1 GOOS=windows GOARCH=$a $GOPATH/bin/xcaddy build {{.Env.TAG}}; done'
+    - /bin/sh -c 'mv /tmp/buildenv_*/*.syso caddy-build'
     # GoReleaser doesn't seem to offer {{.Tag}} at this stage, so we have to embed it into the env
     # so we run: TAG=$(git describe --abbrev=0) goreleaser release --rm-dist --skip-publish --skip-validate
     - go mod edit -require=github.com/caddyserver/caddy/v2@{{.Env.TAG}} ./caddy-build/go.mod
@@ -31,7 +35,6 @@ builds:
 - env:
   - CGO_ENABLED=0
   - GO111MODULE=on
-  main: main.go
   dir: ./caddy-build
   binary: caddy
   goos: