fix: adding default changelog template jenkinsci/git-changelog-plugin#58

src/main/java/se/bjurr/gitchangelog/api/GitChangelogApi.java

@@ -13,16 +13,11 @@
 import com.github.jknack.handlebars.Helper;
 import com.github.jknack.handlebars.Template;
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.StringWriter;
 import java.io.Writer;
-import java.net.URISyntaxException;
 import java.net.URL;
-import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
-import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 import java.util.List;
@@ -47,6 +42,7 @@
 import se.bjurr.gitchangelog.internal.semantic.SemanticVersioning;
 import se.bjurr.gitchangelog.internal.settings.Settings;
 import se.bjurr.gitchangelog.internal.settings.SettingsIssue;
+import se.bjurr.gitchangelog.internal.util.ResourceLoader;
 
 public class GitChangelogApi {
 
@@ -127,28 +123,8 @@ public String getTemplateString() {
     if (this.templateContent != null) {
       return this.templateContent;
     }
-    String templateString = null;
-    try {
-      byte[] templateBytes = null;
-      final Path templatePath = Paths.get(this.settings.getTemplatePath());
-      if (templatePath.toFile().exists()) {
-        templateBytes = Files.readAllBytes(templatePath);
-      } else {
-        URL templateUrl = GitChangelogApi.class.getResource(this.settings.getTemplatePath());
-        if (templateUrl == null) {
-          templateUrl = GitChangelogApi.class.getResource("/" + this.settings.getTemplatePath());
-          if (templateUrl == null) {
-            throw new FileNotFoundException(
-                "Was unable to find file, or resouce, \"" + this.settings.getTemplatePath() + "\"");
-          }
-        }
-        templateBytes = Files.readAllBytes(Paths.get(templateUrl.toURI()));
-        templateString = new String(templateBytes, StandardCharsets.UTF_8);
-      }
-    } catch (final IOException | URISyntaxException e) {
-      throw new RuntimeException(this.settings.getTemplatePath(), e);
-    }
-    return templateString;
+    final String resourceName = this.settings.getTemplatePath();
+    return ResourceLoader.getResourceOrFile(resourceName);
   }
 
   static boolean shouldUseIntegrationIfConfigured(final String templateContent) {

src/main/java/se/bjurr/gitchangelog/internal/util/ResourceLoader.java

@@ -0,0 +1,57 @@
+package se.bjurr.gitchangelog.internal.util;
+
+import java.io.BufferedReader;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.stream.Collectors;
+
+public final class ResourceLoader {
+  private ResourceLoader() {}
+
+  public static String getResourceOrFile(final String resourceName) {
+
+    String templateString = null;
+    try {
+      final Path templatePath = Paths.get(resourceName);
+      if (templatePath.toFile().exists()) {
+
+        Files.readAllBytes(templatePath);
+      } else {
+        InputStream inputStream =
+            getResourceFromClassLoader(resourceName, ResourceLoader.class.getClassLoader());
+        if (inputStream == null) {
+          inputStream =
+              getResourceFromClassLoader(
+                  resourceName, Thread.currentThread().getContextClassLoader());
+        }
+
+        if (inputStream == null) {
+          throw new FileNotFoundException(
+              "Was unable to find file, or resouce, \"" + resourceName + "\"");
+        }
+        templateString =
+            new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8))
+                .lines()
+                .collect(Collectors.joining("\n"));
+      }
+    } catch (final IOException e) {
+      throw new RuntimeException(resourceName, e);
+    }
+    return templateString;
+  }
+
+  private static InputStream getResourceFromClassLoader(
+      final String resourceName, final ClassLoader classLoader) {
+    InputStream inputStream = classLoader.getResourceAsStream(resourceName);
+    if (inputStream == null) {
+      inputStream = classLoader.getResourceAsStream("/" + resourceName);
+    }
+    return inputStream;
+  }
+}

src/main/resources/changelog.mustache

@@ -0,0 +1,32 @@
+# Changelog
+
+Changelog for {{ownerName}} {{repoName}}.
+
+{{#tags}}
+## {{name}}
+ {{#issues}}
+  {{#hasIssue}}
+   {{#hasLink}}
+### {{name}} [{{issue}}]({{link}}) {{title}} {{#hasIssueType}} *{{issueType}}* {{/hasIssueType}} {{#hasLabels}} {{#labels}} *{{.}}* {{/labels}} {{/hasLabels}}
+   {{/hasLink}}
+   {{^hasLink}}
+### {{name}} {{issue}} {{title}} {{#hasIssueType}} *{{issueType}}* {{/hasIssueType}} {{#hasLabels}} {{#labels}} *{{.}}* {{/labels}} {{/hasLabels}}
+   {{/hasLink}}
+  {{/hasIssue}}
+  {{^hasIssue}}
+### {{name}}
+  {{/hasIssue}}
+
+  {{#commits}}
+**{{{messageTitle}}}**
+
+{{#messageBodyItems}}
+ * {{.}} 
+{{/messageBodyItems}}
+
+[{{hash}}](https://github.com/{{ownerName}}/{{repoName}}/commit/{{hash}}) {{authorName}} *{{commitTime}}*
+
+  {{/commits}}
+
+ {{/issues}}
+{{/tags}}

src/test/java/se/bjurr/gitchangelog/api/GitChangelogApiTest.testPathFilterCanBeSpecified.approved.txt

@@ -10,7 +10,6 @@ Extended variable: {{customVariable}}
 * {{authorName}}
 {{/authors}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/GitChangelogApiTest.testThatCommitsWithoutIssueCanBeIgnoredIssuesCommits.approved.txt

@@ -21,7 +21,6 @@ Changelog of Git Changelog.
  {{/commits}}
 {{/issues}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/GitChangelogApiTest.testThatCustomVariablesCanBeUsed.approved.txt

@@ -10,7 +10,6 @@ Extended variable: {{customVariable}}
 * {{authorName}}
 {{/authors}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/GitChangelogApiTest.testThatIssuesCanBeRemoved.approved.txt

@@ -21,7 +21,6 @@ Changelog of Git Changelog.
  {{/commits}}
 {{/issues}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/GitChangelogApiTest.testThatReadableGroupCanBeSet.approved.txt

@@ -21,7 +21,6 @@ Changelog of Git Changelog.
  {{/commits}}
 {{/issues}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/GitChangelogApiTest.testThatRevertedCommitsAreRemoved.approved.txt

@@ -12,7 +12,6 @@ Changelog of Git Changelog.
 
 {{/commits}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/GitChangelogApiTest.testThatTagsThatAreEmptyAfterCommitsHaveBeenIgnoredAreRemoved.approved.txt

@@ -10,7 +10,6 @@ Extended variable: {{customVariable}}
 * {{authorName}}
 {{/authors}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testAuthorsCommits.approved.txt

@@ -16,7 +16,6 @@ Changelog of Git Changelog.
 
 {{/authors}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testCommits.approved.txt

@@ -12,7 +12,6 @@ Changelog of Git Changelog.
 
 {{/commits}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testCommitsVariables.approved.txt

@@ -19,7 +19,6 @@ Changelog of Git Changelog.
 
 {{/commits}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testIssueLabels.approved.txt

@@ -10,7 +10,6 @@ template:
 {{/issues}}
 {{/tags}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testIssueLinkedIssues.approved.txt

@@ -6,7 +6,6 @@ template:
     {{/hasLinkedIssues}}
 {{/issues}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testIssueTitles.approved.txt

@@ -4,7 +4,6 @@ template:
 {{name}} {{title}}
 {{/issues}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testIssueType.approved.txt

@@ -15,7 +15,6 @@ isNoIssue: {{isNoIssue}}
 {{/issues}}
 {{/tags}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testIssuesCommits.approved.txt

@@ -21,7 +21,6 @@ Changelog of Git Changelog.
  {{/commits}}
 {{/issues}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testTagsCommits.approved.txt

@@ -16,7 +16,6 @@ Changelog of Git Changelog.
  {{/commits}}
 {{/tags}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/TemplatesTest.testThatIgnoreCommitsIfMessageMatchesCanBeEmptyToDisableTheFeature.approved.txt

@@ -9,7 +9,6 @@ template:
  {{/merge}}
 {{/commits}}
 
-
 ---------------------------------------------
 
 settings:

src/test/java/se/bjurr/gitchangelog/api/helpers/HandlebarsHelperTest.testThatBuiltInHelperMethodsCanBeUsed.approved.txt

@@ -128,7 +128,6 @@ Has paragraphs: {{hash}}
 
 
 
-
 ---------------------------------------------
 
 settings:
@@ -653,7 +652,6 @@ This reverts commit 1edc0d71eccce51abfb5f62fdddfbe73913785f5.
 
 
 
-
 ---------------------------------------------
 
 context:

src/test/java/se/bjurr/gitchangelog/api/helpers/HandlebarsHelperTest.testThatHelperCanBeSuppliedWithJavascript.approved.txt

@@ -11,7 +11,6 @@ template:
 
 {{/commits}}
 
-
 ---------------------------------------------
 
 settings: