universe: go: add a buildvcs option to go.#Build

The idea here is to allow a user to disable the default `-buildvcs`
flag on 1.18 that requires git.

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

pkg/universe.dagger.io/go/build.cue

@@ -21,6 +21,9 @@ import (
 	// Build tags to use for building
 	tags: *"" | string
 
+    // Enable buildvcs
+    buildvcs: bool | *true
+
 	// LDFLAGS to use for linking
 	ldflags: *"" | string
 
@@ -39,6 +42,9 @@ import (
 				build:      true
 				"-v":       true
 				"-tags":    tags
+                if buildvcs == false {
+                    "-buildvcs=false": true
+                }
 				"-ldflags": ldflags
 				"-o":       "/output/"
 			}

pkg/universe.dagger.io/go/test/build.cue

@@ -17,6 +17,7 @@ dagger.#Plan & {
 		simple: {
 			build: go.#Build & {
 				source: client.filesystem."./data/hello".read.contents
+                buildvcs: false
 			}
 
 			exec: docker.#Run & {