private static Artifact getExecutable(RuleContext ruleContext, Object target)
throws EvalException {
Artifact executable =
ruleContext.getRule().getRuleClassObject().outputsDefaultExecutable()
// This doesn't actually create a new Artifact just returns the one
// created in SkylarkruleContext.
? ruleContext.createOutputArtifact()
: null;
if (target instanceof SkylarkClassObject) {
SkylarkClassObject struct = (SkylarkClassObject) target;
if (struct.getValue("executable") != null) {
// We need this because of genrule.bzl. This overrides the default executable.
executable = cast("executable", struct, Artifact.class, struct.getCreationLoc());
}
}
return executable;
}
private static ConfiguredTarget addStructFields(
RuleContext ruleContext,
RuleConfiguredTargetBuilder builder,
Object target,
Artifact executable)
throws EvalException {
Location loc = null;
Runfiles statelessRunfiles = null;
Runfiles dataRunfiles = null;
Runfiles defaultRunfiles = null;
if (target instanceof SkylarkClassObject) {
SkylarkClassObject struct = (SkylarkClassObject) target;
loc = struct.getCreationLoc();
for (String key : struct.getKeys()) {
if (key.equals("files")) {
// If we specify files_to_build we don't have the executable in it by default.
builder.setFilesToBuild(
cast("files", struct, SkylarkNestedSet.class, Artifact.class, loc)
.getSet(Artifact.class));
} else if (key.equals("runfiles")) {
statelessRunfiles = cast("runfiles", struct, Runfiles.class, loc);
} else if (key.equals("data_runfiles")) {
dataRunfiles = cast("data_runfiles", struct, Runfiles.class, loc);
} else if (key.equals("default_runfiles")) {
defaultRunfiles = cast("default_runfiles", struct, Runfiles.class, loc);
} else if (!key.equals("executable")) {
// We handled executable already.
builder.addSkylarkTransitiveInfo(key, struct.getValue(key), loc);
}
}
}
if ((statelessRunfiles != null) && (dataRunfiles != null || defaultRunfiles != null)) {
throw new EvalException(
loc,
"Cannot specify the provider 'runfiles' "
+ "together with 'data_runfiles' or 'default_runfiles'");
}
if (statelessRunfiles == null && dataRunfiles == null && defaultRunfiles == null) {
// No runfiles specified, set default
statelessRunfiles = Runfiles.EMPTY;
}
RunfilesProvider runfilesProvider =
statelessRunfiles != null
? RunfilesProvider.simple(merge(statelessRunfiles, executable))
: RunfilesProvider.withData(
// The executable doesn't get into the default runfiles if we have runfiles states.
// This is to keep skylark genrule consistent with the original genrule.
defaultRunfiles != null ? defaultRunfiles : Runfiles.EMPTY,
dataRunfiles != null ? dataRunfiles : Runfiles.EMPTY);
builder.addProvider(RunfilesProvider.class, runfilesProvider);
Runfiles computedDefaultRunfiles = runfilesProvider.getDefaultRunfiles();
// This works because we only allowed to call a rule *_test iff it's a test type rule.
boolean testRule = TargetUtils.isTestRuleName(ruleContext.getRule().getRuleClass());
if (testRule && computedDefaultRunfiles.isEmpty()) {
throw new EvalException(loc, "Test rules have to define runfiles");
}
if (executable != null || testRule) {
RunfilesSupport runfilesSupport =
computedDefaultRunfiles.isEmpty()
? null
: RunfilesSupport.withExecutable(ruleContext, computedDefaultRunfiles, executable);
builder.setRunfilesSupport(runfilesSupport, executable);
}
try {
return builder.build();
} catch (IllegalArgumentException e) {
throw new EvalException(loc, e.getMessage());
}
}