94ef3ab625
This change introduces a new prolog predicate for the
number of parents of a given patch set. This can be used to determine
from within the "rules.pl" file whether a change
is a merge commit or not.
This can be useful in order to evaluate a different set of
submit rules for merge commits.
Example usage:
submit_rule(submit(Parents)) :-
Parents = label('Is-Merge', need(_)).
submit_rule(submit(Parents)) :-
gerrit:commit_parent_count(A),
A > 1,
Parents = label('Is-Merge', ok(user(ID))).
Change-Id: I306163510e201606e936d95caea5ffa0bb957236
52 lines
1.6 KiB
Java
52 lines
1.6 KiB
Java
// Copyright (C) 2020 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package gerrit;
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import com.google.gerrit.server.rules.StoredValues;
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import com.googlecode.prolog_cafe.exceptions.PrologException;
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import com.googlecode.prolog_cafe.lang.IntegerTerm;
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import com.googlecode.prolog_cafe.lang.Operation;
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import com.googlecode.prolog_cafe.lang.Predicate;
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import com.googlecode.prolog_cafe.lang.Prolog;
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import com.googlecode.prolog_cafe.lang.Term;
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import org.eclipse.jgit.revwalk.RevCommit;
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/**
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* Prolog fact for the number of parents of a given commit
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*
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* <pre>
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* 'commit_parent_count'(-Count)
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* </pre>
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*/
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public class PRED_commit_parent_count_1 extends Predicate.P1 {
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public PRED_commit_parent_count_1(Term a1, Operation n) {
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arg1 = a1;
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cont = n;
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}
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@Override
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public Operation exec(Prolog engine) throws PrologException {
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engine.setB0();
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Term a1 = arg1.dereference();
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RevCommit commit = StoredValues.COMMIT.get(engine);
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if (!a1.unify(new IntegerTerm(commit.getParentCount()), engine.trail)) {
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return engine.fail();
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}
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return cont;
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}
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}
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