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native_binary: use target name as filename by default #373

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native_binary: use target name as filename by default #373

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4 changes: 2 additions & 2 deletions docs/native_binary_doc.md
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Expand Up @@ -30,7 +30,7 @@ in genrule.tools for example. You can also augment the binary with runfiles.
| :------------- | :------------- | :------------- | :------------- | :------------- |
| <a id="native_binary-name"></a>name | A unique name for this target. | <a href="https://bazel.build/docs/build-ref.html#name">Name</a> | required | |
| <a id="native_binary-data"></a>data | data dependencies. See https://docs.bazel.build/versions/main/be/common-definitions.html#typical.data | <a href="https://bazel.build/docs/build-ref.html#labels">List of labels</a> | optional | [] |
| <a id="native_binary-out"></a>out | An output name for the copy of the binary | String | required | |
| <a id="native_binary-out"></a>out | An output name for the copy of the binary (defaults to target name) | String | optional | "" |
| <a id="native_binary-src"></a>src | path of the pre-built executable | <a href="https://bazel.build/docs/build-ref.html#labels">Label</a> | required | |


Expand All @@ -56,7 +56,7 @@ the binary with runfiles.
| :------------- | :------------- | :------------- | :------------- | :------------- |
| <a id="native_test-name"></a>name | A unique name for this target. | <a href="https://bazel.build/docs/build-ref.html#name">Name</a> | required | |
| <a id="native_test-data"></a>data | data dependencies. See https://docs.bazel.build/versions/main/be/common-definitions.html#typical.data | <a href="https://bazel.build/docs/build-ref.html#labels">List of labels</a> | optional | [] |
| <a id="native_test-out"></a>out | An output name for the copy of the binary | String | required | |
| <a id="native_test-out"></a>out | An output name for the copy of the binary (defaults to target name) | String | optional | "" |
| <a id="native_test-src"></a>src | path of the pre-built executable | <a href="https://bazel.build/docs/build-ref.html#labels">Label</a> | required | |


9 changes: 7 additions & 2 deletions rules/native_binary.bzl
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Expand Up @@ -21,7 +21,12 @@ don't depend on Bash and work with --shell_executable="".
"""

def _impl_rule(ctx):
out = ctx.actions.declare_file(ctx.attr.out)
if ctx.attr.out:
out_file = ctx.attr.out
else:
out_file = ctx.name
out = ctx.actions.declare_file(out_file)

ctx.actions.symlink(
target_file = ctx.executable.src,
output = out,
Expand Down Expand Up @@ -64,7 +69,7 @@ _ATTRS = {
" https://docs.bazel.build/versions/main/be/common-definitions.html#typical.data",
),
# "out" is attr.string instead of attr.output, so that it is select()'able.
"out": attr.string(mandatory = True, doc = "An output name for the copy of the binary"),
"out": attr.string(doc = "An output name for the copy of the binary (defaults to target name)"),
}

native_binary = rule(
Expand Down