Add support for print_progress to container_pull

Currently this depends on a forked version of puller.par.

Pending pull request to upstream puller.par is here:
google/containerregistry#66

Author: scele

container/container.bzl

@@ -39,9 +39,8 @@ def repositories():
   if "puller" not in excludes:
     native.http_file(
       name = "puller",
-      url = ("https://storage.googleapis.com/containerregistry-releases/" +
-             CONTAINERREGISTRY_RELEASE + "/puller.par"),
-      sha256 = "42309ba47bb28d1e1b81ef72789dcca396095e191d4f0e49e2e23c297edd27fb",
+      url = "https://github.com/scele/containerregistry/releases/download/v0.0.26-print-progress/puller.par",
+      sha256 = "2b4778a3f855729c126cc3c86d9ab44bbef28fda68f3344060c5bfcc78d0734e",
       executable = True,
     )
 

container/pull.bzl

@@ -75,6 +75,10 @@ container_import(
   if "PULLER_TIMEOUT" in repository_ctx.os.environ:
       kwargs["timeout"] = int(repository_ctx.os.environ.get("PULLER_TIMEOUT"))
 
+  if repository_ctx.attr.print_progress:
+    kwargs["quiet"] = False
+    args += ["--print-progress"]
+
   result = repository_ctx.execute(args, **kwargs)
   if result.return_code:
     fail("Pull command failed: %s (%s)" % (result.stderr, " ".join(args)))
@@ -85,6 +89,7 @@ container_pull = repository_rule(
         "repository": attr.string(mandatory = True),
         "digest": attr.string(),
         "tag": attr.string(default = "latest"),
+        "print_progress": attr.bool(),
         "_puller": attr.label(
             executable = True,
             default = Label("@puller//file:puller.par"),