filegroup.bzl•1.79 kB
# Copyright (c) Meta Platforms, Inc. and affiliates.
#
# This source code is licensed under both the MIT license found in the
# LICENSE-MIT file in the root directory of this source tree and the Apache
# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
# of this source tree.
load("@prelude//:artifacts.bzl", "ArtifactGroupInfo")
def filegroup_impl(ctx):
"""
Creates a directory that contains links to the list of srcs
The output is a directory that uses `out` for its name, if provided, or the rule name if not.
Each symlink is based on the `short_path` for the provided `src`.
"""
output_name = ctx.attrs.out if ctx.attrs.out else ctx.label.name
if type(ctx.attrs.srcs) == type({}):
srcs = ctx.attrs.srcs
else:
srcs = {}
for src in ctx.attrs.srcs:
existing = srcs.get(src.short_path)
if existing != None and existing != src:
soft_error(
"starlark_filegroup_duplicate_srcs",
"filegroup {} has srcs with duplicate names: {} and {}".format(ctx.label, src, srcs[src.short_path]),
quiet = True,
stack = False,
)
srcs[src.short_path] = src
# It seems that buck1 always copies, and that's important for Python rules
if ctx.attrs.copy:
output = ctx.actions.copied_dir(output_name, srcs)
else:
output = ctx.actions.symlinked_dir(output_name, srcs)
if type(ctx.attrs.srcs) == type([]):
artifacts = ctx.attrs.srcs
else:
artifacts = [output.project(name, hide_prefix = True) for name in srcs]
return [
DefaultInfo(default_output = output),
ArtifactGroupInfo(artifacts = artifacts),
]