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load("@rules_license//rules:compliance.bzl", "manifest")
"""This is a proof of concept to show how to modify a macro definition to
create a sub-graph allowing for build time injection of license information. We
use Android-inspired rule names since these are a likely candidate for this
sort of injection."""
def android_library(name, **kwargs):
# This is an approximation for demo purposes.
data = kwargs.pop("data", [])
native.filegroup(
name = name,
srcs = data + kwargs.get("srcs", []),
)
# Inject the data dependency into the library, preserving any other data it has.
native.sh_library(
name = name + "_w_licenses",
data = data + [name + "_manifest.txt"],
**kwargs
)
def android_binary(name, **kwargs):
# Same observation about not being sloppy with mapping deps, but I think the only important attribute
# in android_binary is deps, but need to double-check.
native.filegroup(
name = name + "_no_licenses",
srcs = kwargs.get("data", []),
)
mf_name = name + "_manifest"
manifest(
name = mf_name,
deps = [":" + name + "_no_licenses"],
)
# This uses the conditions tool to generate an approximation of a compliance report
# to demonstrate how license data can be plumbed and made available at build time.
native.genrule(
name = "gen_" + name + "_manifest",
srcs = [":" + mf_name],
outs = ["licenses_manifest.txt"],
cmd = "cat $(locations :%s) > $@" % mf_name,
)
# Swap out the :licenses dep for our new :licenses_w_licenses dep
newdeps = []
deps = kwargs.get("data", [])
for dep in deps:
if dep == ":licenses":
newdeps.append(":licenses_w_licenses")
else:
newdeps.append(dep)
kwargs["data"] = newdeps
# Compile the executable with the user's originally supplied name, but with the new content.
native.sh_binary(
name = name,
**kwargs
)
|
