mirror of
https://github.com/bazel-contrib/bazel-lib
synced 2024-11-27 17:43:27 +00:00
31 lines
937 B
Python
31 lines
937 B
Python
|
"Example of a rule that can version-stamp its outputs"
|
||
|
|
|
||
|
|
load("//lib:stamping.bzl", "STAMP_ATTRS", "maybe_stamp")
|
||
|
|
|
||
|
|
def _stamp_aware_rule_impl(ctx):
|
||
|
|
args = ctx.actions.args()
|
||
|
|
inputs = []
|
||
|
|
outputs = [ctx.outputs.out]
|
||
|
|
stamp = maybe_stamp(ctx)
|
||
|
|
if stamp:
|
||
|
|
args.add("--volatile_status_file", stamp.volatile_status_file)
|
||
|
|
args.add("--stable_status_file", stamp.stable_status_file)
|
||
|
|
|
||
|
|
inputs.extend([stamp.volatile_status_file, stamp.stable_status_file])
|
||
|
|
|
||
|
|
ctx.actions.run_shell(
|
||
|
|
inputs = inputs,
|
||
|
|
arguments = [args],
|
||
|
|
outputs = outputs,
|
||
|
|
# In reality, this program would also read from the status files.
|
||
|
|
command = "echo $@ > " + outputs[0].path,
|
||
|
|
)
|
||
|
|
return [DefaultInfo(files = depset(outputs))]
|
||
|
|
|
||
|
|
my_stamp_aware_rule = rule(
|
||
|
|
implementation = _stamp_aware_rule_impl,
|
||
|
|
attrs = dict({
|
||
|
|
"out": attr.output(mandatory = True),
|
||
|
|
}, **STAMP_ATTRS),
|
||
|
|
)
|