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# Copyright 2017 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Quick rule to build a Jekyll site."""
def _bucket_from_workspace_name(wname):
"""Try to assert the bucket name from the workspace name.
E.g. it will answer www.bazel.build if the workspace name is build_bazel_www.
Args:
wname: workspace name
Returns:
the guessed name of the bucket for this workspace.
"""
revlist = []
for part in wname.split("_"):
revlist.insert(0, part)
return ".".join(revlist)
def _impl(ctx):
"""Quick and non-hermetic rule to build a Jekyll site."""
source = ctx.actions.declare_directory(ctx.attr.name + "-srcs")
output = ctx.actions.declare_directory(ctx.attr.name + "-build")
ctx.actions.run_shell(inputs = ctx.files.srcs,
outputs = [source],
command = ("mkdir -p %s\n" % (source.path)) +
"\n".join([
"tar xf %s -C %s" % (src.path, source.path) for src in ctx.files.srcs])
)
ctx.actions.run(
inputs = [source],
outputs = [output],
executable = "jekyll",
use_default_shell_env = True,
arguments = ["build", "-q", "-s", source.path, "-d", output.path]
)
ctx.actions.run(
inputs = [output],
outputs = [ctx.outputs.out],
executable = "tar",
arguments = ["cf", ctx.outputs.out.path, "-C", output.path, "."]
)
# Create a shell script to serve the site locally or push with the --push
# flag.
bucket = ctx.attr.bucket if ctx.attr.bucket else _bucket_from_workspace_name(ctx.workspace_name)
ctx.actions.expand_template(
template=ctx.file._jekyll_build_tpl,
output=ctx.outputs.executable,
substitutions={
"%{workspace_name}": ctx.workspace_name,
"%{source_dir}": source.short_path,
"%{prod_dir}": output.short_path,
"%{bucket}": bucket,
},
is_executable=True)
return [DefaultInfo(runfiles=ctx.runfiles(files=[source, output]))]
jekyll_build = rule(
implementation = _impl,
executable = True,
attrs = {
"srcs": attr.label_list(allow_empty=False),
"bucket": attr.string(),
"_jekyll_build_tpl": attr.label(
default=":jekyll_build.sh.tpl",
allow_files=True,
single_file=True)},
outputs = {"out": "%{name}.tar"})
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