feat: add new command to check-commit message

Author: Zorin95670

README.md

@@ -30,11 +30,29 @@ git push origin main
 git push origin --tags
 ```
 
+### ✅ `check-commits`
+
+Validates commit messages against [Conventional Commits](https://www.conventionalcommits.org/) and custom rules:
+
+| Section        | Supported Prefixes                         |
+| -------------- | ------------------------------------------ |
+| **Added**      | `feat`                                     |
+| **Fixed**      | `fix`                                      |
+| **Changed**    | `perf`, `refactor`, `style`, `ci`, `build` |
+| **Removed**    | `removed`                                  |
+| **Security**   | `security`                                 |
+| **Deprecated** | `deprecated`                               |
+
+* Logs a warning for any invalid commit prefix.
+* Can be configured to fail the build if any invalid commit is found using the `failOnWarning` parameter:
+
 ## Usage
 
 Add the plugin to your project or run it using the CLI:
 
 ```bash
+mvn io.github.zorin95670:semantic-version:check-commit
+mvn io.github.zorin95670:semantic-version:check-commit -DfailOnWarning=true
 mvn io.github.zorin95670:semantic-version:changelog
 mvn io.github.zorin95670:semantic-version:changelog -DdryRun=true
 mvn io.github.zorin95670:semantic-version:release

src/main/java/io/github/zorin95670/semver/CheckCommitMojo.java

@@ -0,0 +1,27 @@
+package io.github.zorin95670.semver;
+
+import io.github.zorin95670.semver.service.GitService;
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoFailureException;
+import org.apache.maven.plugins.annotations.LifecyclePhase;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+
+import java.io.File;
+
+@Mojo(name = "check-commit", defaultPhase = LifecyclePhase.NONE)
+public class CheckCommitMojo extends AbstractMojo {
+
+    @Parameter(property = "failOnWarning", defaultValue = "false")
+    private boolean failOnWarning;
+
+    @Parameter(defaultValue = "${project.basedir}", readonly = true)
+    private File basedir;
+
+    public void execute() throws MojoFailureException {
+        getLog().info("Check commit plugin started");
+        GitService gitService = new GitService(basedir);
+
+        gitService.checkCommitNames(failOnWarning, getLog());
+    }
+}

src/main/java/io/github/zorin95670/semver/service/GitService.java

@@ -1,5 +1,7 @@
 package io.github.zorin95670.semver.service;
 
+import org.apache.maven.plugin.MojoFailureException;
+import org.apache.maven.plugin.logging.Log;
 import org.eclipse.jgit.api.Git;
 import org.eclipse.jgit.api.errors.*;
 import org.eclipse.jgit.lib.ObjectId;
@@ -322,4 +324,66 @@ public String getUrl() {
 
         return null;
     }
+
+    public void checkCommitNames(boolean failOnWarning, Log log) throws MojoFailureException {
+        List<String> validPrefixes = Arrays.asList(
+            "feat", "fix", "perf", "refactor", "style", "ci", "build",
+            "removed", "security", "deprecated"
+        );
+
+        Repository repo = git.getRepository();
+
+        Iterable<RevCommit> commits;
+
+        try {
+            List<Ref> tagList = git.tagList().call();
+            RevCommit lastTaggedCommit = null;
+
+            if (!tagList.isEmpty()) {
+                RevWalk revWalk = new RevWalk(repo);
+                RevCommit latest = null;
+                for (Ref tag : tagList) {
+                    RevCommit commit = revWalk.parseCommit(repo.resolve(tag.getName()));
+                    if (latest == null || commit.getCommitTime() > latest.getCommitTime()) {
+                        latest = commit;
+                    }
+                }
+                lastTaggedCommit = latest;
+                revWalk.dispose();
+            }
+
+            if (lastTaggedCommit != null) {
+                commits = git.log().add(repo.resolve("HEAD")).not(lastTaggedCommit).call();
+            } else {
+                commits = git.log().call();
+            }
+        } catch (GitAPIException | IOException e) {
+            throw new RuntimeException(e);
+        }
+
+        boolean hasError = false;
+        boolean hasWarning = false;
+
+        for (RevCommit commit : commits) {
+            String message = commit.getShortMessage();
+
+            if (!message.matches("^[a-z]+(\\([\\w\\-]+\\))?: .+")) {
+                log.error("Invalid commit format: \"" + message + "\"");
+                hasError = true;
+                continue;
+            }
+
+            String type = message.split("[:(]")[0];
+            if (!validPrefixes.contains(type)) {
+                log.warn("Unsupported commit prefix: \"" + message + "\"");
+                hasWarning = true;
+            }
+        }
+
+        if (hasError || (failOnWarning && hasWarning)) {
+            throw new MojoFailureException("Some commits do not follow the Conventional Commit format.");
+        } else {
+            log.info("✅ all commits are valid.");
+        }
+    }
 }