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bazel-skylib/docs/selects_doc.md
nickgooding 31ab4c8bd2
feat: bzlmod setup (#385)
Creates MODULE.bazel and WORKSPACE.bzlmod files to enable bazel-skylib
to work with the `--experimental_enable_bzlmod` flag.

rules_go has been updated as the previously used version is not
available in the BCR.

stardoc has been updated due to a strange issue with Bzlmod enabled that
caused the `diff_test` and `unittest` docs to be generated without any
contents that was magically fixed upon updating.

bazelbuild/bazel-central-registry#124

Co-authored-by: Alexandre Rostovtsev <arostovtsev@google.com>
2022-08-30 14:57:34 -04:00

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<!-- Generated with Stardoc: http://skydoc.bazel.build -->
Skylib module containing convenience interfaces for select().
<a id="selects.with_or"></a>
## selects.with_or
<pre>
selects.with_or(<a href="#selects.with_or-input_dict">input_dict</a>, <a href="#selects.with_or-no_match_error">no_match_error</a>)
</pre>
Drop-in replacement for `select()` that supports ORed keys.
Example:
```build
deps = selects.with_or({
"//configs:one": [":dep1"],
("//configs:two", "//configs:three"): [":dep2or3"],
"//configs:four": [":dep4"],
"//conditions:default": [":default"]
})
```
Key labels may appear at most once anywhere in the input.
**PARAMETERS**
| Name | Description | Default Value |
| :------------- | :------------- | :------------- |
| <a id="selects.with_or-input_dict"></a>input_dict | The same dictionary <code>select()</code> takes, except keys may take either the usual form <code>"//foo:config1"</code> or <code>("//foo:config1", "//foo:config2", ...)</code> to signify <code>//foo:config1</code> OR <code>//foo:config2</code> OR <code>...</code>. | none |
| <a id="selects.with_or-no_match_error"></a>no_match_error | Optional custom error to report if no condition matches. | <code>""</code> |
**RETURNS**
A native `select()` that expands
`("//configs:two", "//configs:three"): [":dep2or3"]`
to
```build
"//configs:two": [":dep2or3"],
"//configs:three": [":dep2or3"],
```
<a id="selects.with_or_dict"></a>
## selects.with_or_dict
<pre>
selects.with_or_dict(<a href="#selects.with_or_dict-input_dict">input_dict</a>)
</pre>
Variation of `with_or` that returns the dict of the `select()`.
Unlike `select()`, the contents of the dict can be inspected by Starlark
macros.
**PARAMETERS**
| Name | Description | Default Value |
| :------------- | :------------- | :------------- |
| <a id="selects.with_or_dict-input_dict"></a>input_dict | Same as <code>with_or</code>. | none |
**RETURNS**
A dictionary usable by a native `select()`.
<a id="selects.config_setting_group"></a>
## selects.config_setting_group
<pre>
selects.config_setting_group(<a href="#selects.config_setting_group-name">name</a>, <a href="#selects.config_setting_group-match_any">match_any</a>, <a href="#selects.config_setting_group-match_all">match_all</a>, <a href="#selects.config_setting_group-visibility">visibility</a>)
</pre>
Matches if all or any of its member `config_setting`s match.
Example:
```build
config_setting(name = "one", define_values = {"foo": "true"})
config_setting(name = "two", define_values = {"bar": "false"})
config_setting(name = "three", define_values = {"baz": "more_false"})
config_setting_group(
name = "one_two_three",
match_all = [":one", ":two", ":three"]
)
cc_binary(
name = "myapp",
srcs = ["myapp.cc"],
deps = select({
":one_two_three": [":special_deps"],
"//conditions:default": [":default_deps"]
})
```
**PARAMETERS**
| Name | Description | Default Value |
| :------------- | :------------- | :------------- |
| <a id="selects.config_setting_group-name"></a>name | The group's name. This is how <code>select()</code>s reference it. | none |
| <a id="selects.config_setting_group-match_any"></a>match_any | A list of <code>config_settings</code>. This group matches if *any* member in the list matches. If this is set, <code>match_all</code> must not be set. | <code>[]</code> |
| <a id="selects.config_setting_group-match_all"></a>match_all | A list of <code>config_settings</code>. This group matches if *every* member in the list matches. If this is set, <code>match_any</code> must be not set. | <code>[]</code> |
| <a id="selects.config_setting_group-visibility"></a>visibility | Visibility of the config_setting_group. | <code>None</code> |