mirror of
https://github.com/bazel-contrib/bazel-lib
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91 lines
3.3 KiB
Python
91 lines
3.3 KiB
Python
"""Implementation for jq rule"""
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load("//lib:stamping.bzl", "STAMP_ATTRS", "maybe_stamp")
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_jq_attrs = dict({
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"srcs": attr.label_list(
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allow_files = True,
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mandatory = True,
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allow_empty = True,
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),
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"filter": attr.string(),
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"filter_file": attr.label(allow_single_file = True),
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"args": attr.string_list(),
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"out": attr.output(),
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"_parse_status_file_filter": attr.label(
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allow_single_file = True,
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default = Label("//lib/private:parse_status_file.jq"),
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),
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}, **STAMP_ATTRS)
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def _jq_impl(ctx):
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jq_bin = ctx.toolchains["@aspect_bazel_lib//lib:jq_toolchain_type"].jqinfo.bin
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out = ctx.outputs.out or ctx.actions.declare_file(ctx.attr.name + ".json")
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args = ctx.attr.args
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inputs = ctx.files.srcs[:]
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if not ctx.attr.filter and not ctx.attr.filter_file:
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fail("Must provide a filter or a filter_file")
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if ctx.attr.filter and ctx.attr.filter_file:
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fail("Cannot provide both a filter and a filter_file")
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# jq hangs when there are no input sources unless --null-input flag is passed
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if len(ctx.attr.srcs) == 0 and "-n" not in args and "--null-input" not in args:
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args = args + ["--null-input"]
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if ctx.attr.filter_file:
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args = args + ["--from-file '%s'" % ctx.file.filter_file.path]
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inputs.append(ctx.file.filter_file)
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stamp = maybe_stamp(ctx)
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if stamp:
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# create an action that gives a JSON representation of the stamp keys
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stamp_json = ctx.actions.declare_file("_%s_stamp.json" % ctx.label.name)
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ctx.actions.run_shell(
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tools = [jq_bin],
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inputs = [stamp.stable_status_file, stamp.volatile_status_file, ctx.file._parse_status_file_filter],
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outputs = [stamp_json],
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command = "{jq} -s -R -f {filter} {stable} {volatile} > {out}".format(
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jq = jq_bin.path,
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filter = ctx.file._parse_status_file_filter.path,
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stable = stamp.stable_status_file.path,
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volatile = stamp.volatile_status_file.path,
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out = stamp_json.path,
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),
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mnemonic = "ConvertStatusToJson",
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)
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inputs.append(stamp_json)
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# jq says of --argfile:
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# > Do not use. Use --slurpfile instead.
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# > (This option is like --slurpfile, but when the file has just one text,
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# > then that is used, else an array of texts is used as in --slurpfile.)
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# However there's no indication that it's deprecated. Maybe it's a style convention.
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# For our purposes, "$STAMP.BUILD_TIMESTAMP" looks a lot more sensible in a BUILD file
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# than "$STAMP[0].BUILD_TIMESTAMP".
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args = args + ["--argfile", "STAMP", stamp_json.path]
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cmd = "{jq} {args} {filter} {sources} > {out}".format(
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jq = jq_bin.path,
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args = " ".join(args),
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filter = "'%s'" % ctx.attr.filter if ctx.attr.filter else "",
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sources = " ".join(["'%s'" % file.path for file in ctx.files.srcs]),
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out = out.path,
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)
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ctx.actions.run_shell(
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tools = [jq_bin],
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inputs = inputs,
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outputs = [out],
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command = cmd,
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mnemonic = "Jq",
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)
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return DefaultInfo(files = depset([out]), runfiles = ctx.runfiles([out]))
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jq_lib = struct(
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attrs = _jq_attrs,
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implementation = _jq_impl,
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)
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