internal/rosa: force output colouring

This sets known de facto standard environment variables to enable colours during builds.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/make.go

@@ -173,6 +173,7 @@ make \
 		scriptMake += attr.ScriptCheckEarly + `make \
 	` + jobsFlagE + ` \
 	` + loadFlagE + ` \
+	AM_COLOR_TESTS=always \
 	`
 		if len(attr.Check) > 0 {
 			scriptMake += strings.Join(attr.Check, " \\\n\t")

internal/rosa/rosa.go

@@ -322,6 +322,8 @@ type PackageAttr struct {
 
 	// Hint for an early variant of toybox to be used when available.
 	Early bool
+	// Whether to omit output colour environment variables.
+	NoColor bool
 	// Exclude the LLVM toolchain.
 	NoToolchain bool
 	// Whether the resulting [pkg.Artifact] is exclusive.
@@ -399,6 +401,12 @@ func (t Toolchain) New(
 	const lcMessages = "LC_MESSAGES=C.UTF-8"
 	srn := rn
 	env := slices.Clone(attr.Env)
+	if !attr.NoColor {
+		env = append(env,
+			"CLICOLOR_FORCE=1",
+			"FORCE_COLOR=1",
+		)
+	}
 
 	var extraBoot []ArtifactH
 	switch t.stage {