bazel-lib/lib/params_file.bzl

65 lines
2.5 KiB
Python

"params_file public API"
load("//lib/private:params_file.bzl", _params_file = "params_file")
def params_file(
name,
out,
args = [],
data = [],
newline = "auto",
**kwargs):
"""Generates a UTF-8 encoded params file from a list of arguments.
Handles variable substitutions for args.
Args:
name: Name of the rule.
out: Path of the output file, relative to this package.
args: Arguments to concatenate into a params file.
Subject to 'Make variable' substitution. See https://docs.bazel.build/versions/main/be/make-variables.html.
<ol>
<li> Subject to predefined source/output path variables substitutions.
The predefined variables `execpath`, `execpaths`, `rootpath`, `rootpaths`, `location`, and `locations` take
label parameters (e.g. `$(execpath //foo:bar)`) and substitute the file paths denoted by that label.
See https://docs.bazel.build/versions/main/be/make-variables.html#predefined_label_variables for more info.
NB: This $(location) substition returns the manifest file path which differs from the `*_binary` & `*_test`
args and genrule bazel substitions. This will be fixed in a future major release.
See docs string of `expand_location_into_runfiles` macro in `internal/common/expand_into_runfiles.bzl`
for more info.</li>
<li>Subject to predefined variables & custom variable substitutions.
Predefined "Make" variables such as `$(COMPILATION_MODE)` and `$(TARGET_CPU)` are expanded.
See https://docs.bazel.build/versions/main/be/make-variables.html#predefined_variables.
Custom variables are also expanded including variables set through the Bazel CLI with `--define=SOME_VAR=SOME_VALUE`.
See https://docs.bazel.build/versions/main/be/make-variables.html#custom_variables.
Predefined genrule variables are not supported in this context.</li>
</ol>
data: Data for `$(location)` expansions in args.
newline: Line endings to use. One of [`"auto"`, `"unix"`, `"windows"`].
<ul>
<li>`"auto"` for platform-determined</li>
<li>`"unix"` for LF</li>
<li>`"windows"` for CRLF</li>
</ul>
**kwargs: undocumented named arguments
"""
_params_file(
name = name,
out = out,
args = args,
data = data,
newline = newline or "auto",
**kwargs
)