Add option to always include branches, regardless of whether a pull request exist for those branches or not

src/main/java/com/cloudbees/jenkins/plugins/bitbucket/trait/BranchDiscoveryTrait.java

@@ -29,10 +29,17 @@
 import com.cloudbees.jenkins.plugins.bitbucket.Messages;
 import com.cloudbees.jenkins.plugins.bitbucket.api.BitbucketPullRequest;
 import com.cloudbees.jenkins.plugins.bitbucket.api.BitbucketRepository;
+import edu.umd.cs.findbugs.annotations.CheckForNull;
 import edu.umd.cs.findbugs.annotations.NonNull;
 import hudson.Extension;
+import hudson.Util;
+import hudson.model.Item;
+import hudson.util.FormValidation;
 import hudson.util.ListBoxModel;
 import java.io.IOException;
+import java.util.regex.Pattern;
+import java.util.regex.PatternSyntaxException;
+import jenkins.model.Jenkins;
 import jenkins.scm.api.SCMHead;
 import jenkins.scm.api.SCMHeadCategory;
 import jenkins.scm.api.SCMHeadOrigin;
@@ -48,7 +55,11 @@
 import org.jenkinsci.Symbol;
 import org.kohsuke.accmod.Restricted;
 import org.kohsuke.accmod.restrictions.NoExternalUse;
+import org.kohsuke.stapler.AncestorInPath;
 import org.kohsuke.stapler.DataBoundConstructor;
+import org.kohsuke.stapler.DataBoundSetter;
+import org.kohsuke.stapler.QueryParameter;
+import org.kohsuke.stapler.interceptor.RequirePOST;
 
 /**
  * A {@link Discovery} trait for bitbucket that will discover branches on the repository.
@@ -67,6 +78,17 @@
      */
     private final int strategyId;
 
+    /**
+     * Regex of branches that should always be included regardless of whether a merge request exists or not.
+     */
+    private String branchesAlwaysIncludedRegex;
+
+    /**
+     * The compiled {@link Pattern} of the branchesAlwaysIncludedRegex.
+     */
+    @CheckForNull
+    private transient Pattern branchesAlwaysIncludedRegexPattern;
+
     /**
      * Constructor for stapler.
      *
@@ -96,6 +118,36 @@
         return strategyId;
     }
 
+    /**
+     * Returns the branchesAlwaysIncludedRegex.
+     *
+     * @return the branchesAlwaysIncludedRegex.
+     */
+    public String getBranchesAlwaysIncludedRegex() {
+        return branchesAlwaysIncludedRegex;
+    }
+
+    /**
+     * Sets the branchesAlwaysIncludedRegex.
+     */
+    @DataBoundSetter
+    public void setBranchesAlwaysIncludedRegex(@CheckForNull String branchesAlwaysIncludedRegex) {
+        this.branchesAlwaysIncludedRegex = Util.fixEmptyAndTrim(branchesAlwaysIncludedRegex);
+    }
+
+    /**
+     * Returns the compiled {@link Pattern} of the branchesAlwaysIncludedRegex.
+     *
+     * @return the branchesAlwaysIncludedRegexPattern.
+     */
+    public Pattern getBranchesAlwaysIncludedRegexPattern() {
+        if (branchesAlwaysIncludedRegex != null && branchesAlwaysIncludedRegexPattern == null) {
+            branchesAlwaysIncludedRegexPattern = Pattern.compile(branchesAlwaysIncludedRegex);
+        }
+
+        return branchesAlwaysIncludedRegexPattern;
+    }
+
     /**
      * Returns {@code true} if building branches that are not filed as a PR.
      *
@@ -127,11 +179,11 @@
         switch (strategyId) {
             case 1:
                 ctx.wantOriginPRs(true);
-                ctx.withFilter(new ExcludeOriginPRBranchesSCMHeadFilter());
+                ctx.withFilter(new ExcludeOriginPRBranchesSCMHeadFilter(getBranchesAlwaysIncludedRegexPattern()));
                 break;
             case 2:
                 ctx.wantOriginPRs(true);
-                ctx.withFilter(new OnlyOriginPRBranchesSCMHeadFilter());
+                ctx.withFilter(new OnlyOriginPRBranchesSCMHeadFilter(getBranchesAlwaysIncludedRegexPattern()));
                 break;
             case 3:
             default:
@@ -179,6 +231,27 @@
             result.add(Messages.BranchDiscoveryTrait_allBranches(), "3");
             return result;
         }
+
+        @NonNull
+        @Restricted(NoExternalUse.class)
+        @RequirePOST
+        public FormValidation doCheckBranchesAlwaysIncludedRegex(@CheckForNull @AncestorInPath Item context, @QueryParameter String value) {
+            if(context == null) {
+                Jenkins.get().checkPermission(Jenkins.MANAGE);
+            } else {
+                context.checkPermission(Item.CONFIGURE);
+            }
+
+            if (value == null || value.isBlank()) {
+                return FormValidation.ok();
+            }
+            try {
+                Pattern.compile(value);
+                return FormValidation.ok();
+            } catch (PatternSyntaxException ex) {
+                return FormValidation.error(ex.getMessage());
+            }
+        }
     }
 
     /**
@@ -220,12 +293,41 @@
      * Filter that excludes branches that are also filed as a pull request.
      */
     public static class ExcludeOriginPRBranchesSCMHeadFilter extends SCMHeadFilter {
+
+        /**
+         * The compiled {@link Pattern} of the branchesAlwaysIncludedRegex.
+         */
+        private final Pattern branchesAlwaysIncludedRegexPattern;
+
+        public ExcludeOriginPRBranchesSCMHeadFilter() {
+            branchesAlwaysIncludedRegexPattern = null;
+        }
+
+        /**
+         * Constructor
+         *
+         * @param branchesAlwaysIncludedRegexPattern the branchesAlwaysIncludedRegexPattern.
+         */
+        public ExcludeOriginPRBranchesSCMHeadFilter(Pattern branchesAlwaysIncludedRegexPattern) {
+            this.branchesAlwaysIncludedRegexPattern = branchesAlwaysIncludedRegexPattern;
+        }
+
         /**
          * {@inheritDoc}
          */
         @Override
         public boolean isExcluded(@NonNull SCMSourceRequest request, @NonNull SCMHead head) {
             if (head instanceof BranchSCMHead && request instanceof BitbucketSCMSourceRequest) {
+                if (branchesAlwaysIncludedRegexPattern != null
+                        && branchesAlwaysIncludedRegexPattern
+                                .matcher(head.getName())
+                                .matches()) {
+                    request.listener()
+                            .getLogger()
+                            .println("Include branch " + head.getName()
+                                    + " because branch name matches always included pattern");
+                    return false;
+                }
                 BitbucketSCMSourceRequest req = (BitbucketSCMSourceRequest) request;
                 String fullName = req.getRepoOwner() + "/" + req.getRepository();
                 try {
@@ -251,12 +353,42 @@
      * Filter that excludes branches that are not also filed as a pull request.
      */
     public static class OnlyOriginPRBranchesSCMHeadFilter extends SCMHeadFilter {
+
+        /**
+         * The compiled {@link Pattern} of the branchesAlwaysIncludedRegex.
+         */
+        private final Pattern branchesAlwaysIncludedRegexPattern;
+
+        public OnlyOriginPRBranchesSCMHeadFilter() {
+            branchesAlwaysIncludedRegexPattern = null;
+        }
+
+        /**
+         * Constructor
+         *
+         * @param branchesAlwaysIncludedRegexPattern the branchesAlwaysIncludedRegexPattern.
+         */
+        public OnlyOriginPRBranchesSCMHeadFilter(Pattern branchesAlwaysIncludedRegexPattern) {
+            this.branchesAlwaysIncludedRegexPattern = branchesAlwaysIncludedRegexPattern;
+        }
+
         /**
          * {@inheritDoc}
          */
         @Override
         public boolean isExcluded(@NonNull SCMSourceRequest request, @NonNull SCMHead head) {
             if (head instanceof BranchSCMHead && request instanceof BitbucketSCMSourceRequest) {
+                if (branchesAlwaysIncludedRegexPattern != null
+                        && branchesAlwaysIncludedRegexPattern
+                                .matcher(head.getName())
+                                .matches()) {
+                    request.listener()
+                            .getLogger()
+                            .println("Include branch " + head.getName()
+                                    + " because branch name matches always included pattern");
+                    return false;
+                }
+
                 BitbucketSCMSourceRequest req = (BitbucketSCMSourceRequest) request;
                 String fullName = req.getRepoOwner() + "/" + req.getRepository();
                 try {
@@ -267,8 +399,11 @@
                             return false;
                         }
                     }
-                    request.listener().getLogger().println("Discard branch " + head.getName()
-                            + " because current strategy excludes branches that are not also filed as a pull request");
+                    request.listener()
+                            .getLogger()
+                            .println(
+                                    "Discard branch " + head.getName()
+                                            + " because current strategy excludes branches that are not also filed as a pull request");
                     return true;
                 } catch (IOException | InterruptedException e) {
                     // should never happens because data in the requests has been already initialised

src/main/resources/com/cloudbees/jenkins/plugins/bitbucket/trait/BranchDiscoveryTrait/config.jelly

@@ -5,4 +5,7 @@
   <f:entry title="${%Strategy}" field="strategyId">
     <f:select default="1"/>
   </f:entry>
+   <f:entry title="${%Branches to always include}" field="branchesAlwaysIncludedRegex">
+      <f:textbox/>
+    </f:entry>
 </j:jelly>

src/main/resources/com/cloudbees/jenkins/plugins/bitbucket/trait/BranchDiscoveryTrait/help-branchesAlwaysIncludedRegex.html

@@ -0,0 +1,3 @@
+<div>
+    Regular expression of branches that should always be included regardless of whether a pull request exists or not for those branches.
+</div>