/**
* Returns the linked artifact resulting from a linking of the given type. Consults the feature
* configuration to obtain an action_config that provides the artifact. If the feature
* configuration provides no artifact, uses a default.
*
* <p>We cannot assume that the feature configuration contains an action_config for the link
* action, because the linux link action depends on hardcoded values in
* LinkCommandLine.getRawLinkArgv(), which are applied on the condition that an action_config is
* not present. TODO(b/30393154): Assert that the given link action has an action_config.
*
* @throws RuleErrorException
*/
private Artifact getLinkedArtifact(LinkTargetType linkTargetType) throws RuleErrorException {
Artifact result = null;
Artifact linuxDefault = CppHelper.getLinuxLinkedArtifact(ruleContext, linkTargetType);
try {
String templatedName =
features.getArtifactNameForCategory(
linkTargetType.getLinkerOutput(), ruleContext, ImmutableMap.<String, String>of());
PathFragment artifactFragment =
new PathFragment(ruleContext.getLabel().getName())
.getParentDirectory()
.getRelative(templatedName);
result =
ruleContext.getPackageRelativeArtifact(
artifactFragment, ruleContext.getConfiguration().getBinDirectory());
} catch (ExpansionException e) {
ruleContext.throwWithRuleError(e.getMessage());
}
// If the linked artifact is not the linux default, then a FailAction is generated for the
// linux default to satisfy the requirement of the implicit output.
// TODO(b/30132703): Remove the implicit outputs of cc_library.
if (!result.equals(linuxDefault)) {
ruleContext.registerAction(
new FailAction(
ruleContext.getActionOwner(),
ImmutableList.of(linuxDefault),
String.format(
"the given toolchain supports creation of %s instead of %s",
linuxDefault.getExecPathString(), result.getExecPathString())));
}
return result;
}
