internal/rosa: remove calls to low-level exec helper

This method predates the helper infrastructure, it is awkward to use and difficult to maintain for the replacement bootstrap mechanism. This change prepares for its removal.

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

internal/rosa/git.go

@@ -17,13 +17,16 @@ func (t Toolchain) NewViaGit(
 	url, rev string,
 	checksum pkg.Checksum,
 ) pkg.Artifact {
-	return t.New(strings.TrimSuffix(
+	return t.NewPackage(strings.TrimSuffix(
 		path.Base(url),
 		".git",
-	)+"-src-"+path.Base(rev), THostNet, t.Append(nil,
+	)+"-src", path.Base(rev), nil, &PackageAttr{
-		_nssCACert,
+		KnownChecksum: &checksum,
-		_git,
+
-	), &checksum, nil, `
+		Flag:  THostNet,
+		Paths: []pkg.ExecPath{resolvconf()},
+	}, &GenericHelper{
+		Build: `
 git \
 	-c advice.detachedHead=false \
 	clone \
@@ -34,5 +37,9 @@ git \
 	` + url + ` \
 	/work
 rm -rf /work/.git
-`, resolvconf())
+`,
+	},
+		_nssCACert,
+		_git,
+	)
 }

internal/rosa/rosa.go

@@ -363,9 +363,14 @@ function apply {
 			buf.WriteString("'\n")
 		}
 	}
-	return t.New(name+"-src", 0, t.Append(nil,
+
+	return t.NewPackage(name+"-src", Unversioned, nil, &PackageAttr{
+		Paths: paths,
+	}, &GenericHelper{
+		Build: buf.String(),
+	},
 		_patch,
-	), nil, nil, buf.String(), paths...)
+	)
 }
 
 // helperInPlace is a special directory value for omitting the cd statement.