build-from-source option plumbing

Lib/gftools/packager/__init__.py

@@ -326,7 +326,10 @@ def assets_are_same(src: Path, dst: Path) -> bool:
 
 
 def package_family(
-    family_path: Path, metadata: fonts_pb2.FamilyProto, latest_release=False
+    family_path: Path,
+    metadata: fonts_pb2.FamilyProto,
+    latest_release=False,
+    build_from_source=False,
 ):
     """Create a family into a google/fonts repo."""
     log.info(f"Downloading family to '{family_path}'")
@@ -598,6 +601,7 @@ def make_package(
     base_repo: str = "google",
     head_repo: str = "google",
     latest_release: bool = False,
+    build_from_source: bool = False,
     issue_number=None,
     **kwargs,
 ):
@@ -679,7 +683,9 @@ def make_package(
 
     with current_git_state(repo, family_path):
         branch = create_git_branch(metadata, repo, head_repo)
-        packaged = package_family(family_path, metadata, latest_release)
+        packaged = package_family(
+            family_path, metadata, latest_release, build_from_source
+        )
         title, msg, branch = commit_family(
             branch, family_path, metadata, repo, head_repo, issue_number
         )

Lib/gftools/scripts/packager.py

@@ -60,11 +60,17 @@ def main(args=None):
         default="ofl",
         choices=("ofl", "apache", "ufl"),
     )
-    parser.add_argument(
+    obtain_group = parser.add_mutually_exclusive_group()
+    obtain_group.add_argument(
         "--latest-release",
         help="Get assets from latest upstream release",
         action="store_true",
     )
+    obtain_group.add_argument(
+        "--build-from-source",
+        help="Download and build fonts from source files",
+        action="store_true",
+    )
     parser.add_argument(
         "--log-level",
         choices=("DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"),