/**
* Returns the xcode version number corresponding to the {@code --xcode_version} flag, if there is
* an available {@code xcode_version} target which recognizes the flag value as either an official
* version or an alias. Returns null if no such target is found.
*/
@Nullable
private DottedVersion resolveExplicitlyDefinedVersion(RuleContext ruleContext) {
AppleConfiguration configuration = ruleContext.getFragment(AppleConfiguration.class);
Optional<DottedVersion> versionOverrideFlag = configuration.getXcodeVersionOverrideFlag();
if (versionOverrideFlag.isPresent()) {
// The version override flag is not necessarily an actual version - it may be a version
// alias.
DottedVersion explicitVerison =
aliasesToVersionMap(ruleContext).get(versionOverrideFlag.get().toString());
if (explicitVerison != null) {
return explicitVerison;
}
} else { // No override specified. Use default.
XcodeVersionProvider defaultProvider =
ruleContext.getPrerequisite(
XcodeConfigRule.DEFAULT_ATTR_NAME, Mode.TARGET, XcodeVersionProvider.class);
if (defaultProvider != null) {
return defaultProvider.getVersion();
}
}
boolean requireDefinedVersions =
ruleContext.attributes().get(XcodeConfigRule.REQUIRE_DEFINED_VERSIONS_ATTR_NAME, BOOLEAN);
if (requireDefinedVersions) {
ruleContext.ruleError(
"xcode version config required an explicitly defined version, but none was available");
}
return null;
}
@Override
public ConfiguredTarget create(RuleContext ruleContext) throws InterruptedException {
AppleConfiguration configuration = ruleContext.getFragment(AppleConfiguration.class);
Optional<DottedVersion> versionOverrideFlag = configuration.getXcodeVersionOverrideFlag();
DottedVersion targetVersion = resolveExplicitlyDefinedVersion(ruleContext);
XcodeConfigProvider xcodeConfigProvider;
if (targetVersion == null) {
if (versionOverrideFlag.isPresent()) {
xcodeConfigProvider = new XcodeConfigProvider(versionOverrideFlag.get());
} else {
xcodeConfigProvider = XcodeConfigProvider.hostSystemDefault();
}
} else {
xcodeConfigProvider = new XcodeConfigProvider(targetVersion);
}
return new RuleConfiguredTargetBuilder(ruleContext)
.addProvider(RunfilesProvider.class, RunfilesProvider.EMPTY)
.addProvider(XcodeConfigProvider.class, xcodeConfigProvider)
.build();
}
