Fix relative links

Author: reakaleek

src/Elastic.Markdown/Myst/InlineParsers/DiagnosticLinkInlineParser.cs

@@ -168,10 +168,10 @@ private static void ProcessInternalLink(InlineProcessor processor, LinkInline li
 	{
 		var (url, anchor) = SplitUrlAndAnchor(link.Url ?? string.Empty);
 		var includeFrom = GetIncludeFromPath(url, context);
-
+		var file = ResolveFile(context, url);
 		ValidateInternalUrl(processor, url, includeFrom, line, column, length, context);
-		ProcessLinkText(processor, link, context, url, anchor, line, column, length);
-		UpdateLinkUrl(link, url, anchor, context.Build.UrlPathPrefix ?? string.Empty);
+		ProcessLinkText(processor, link, context, url, anchor, line, column, length, file);
+		UpdateLinkUrl(link, url, context, anchor, file);
 	}
 
 	private static (string url, string? anchor) SplitUrlAndAnchor(string fullUrl)
@@ -195,12 +195,11 @@ private static void ValidateInternalUrl(InlineProcessor processor, string url, s
 			processor.EmitError(line, column, length, $"`{url}` does not exist. resolved to `{pathOnDisk}");
 	}
 
-	private static void ProcessLinkText(InlineProcessor processor, LinkInline link, ParserContext context, string url, string? anchor, int line, int column, int length)
+	private static void ProcessLinkText(InlineProcessor processor, LinkInline link, ParserContext context, string url, string? anchor, int line, int column, int length, IFileInfo file)
 	{
 		if (link.FirstChild != null && string.IsNullOrEmpty(anchor))
 			return;
 
-		var file = ResolveFile(context, url);
 		var markdown = context.GetDocumentationFile?.Invoke(file) as MarkdownFile;
 
 		if (markdown == null)
@@ -236,13 +235,19 @@ private static void ValidateAnchor(InlineProcessor processor, MarkdownFile markd
 			processor.EmitError(line, column, length, $"`{anchor}` does not exist in {markdown.FileName}.");
 	}
 
-	private static void UpdateLinkUrl(LinkInline link, string url, string? anchor, string urlPathPrefix)
+	private static void UpdateLinkUrl(LinkInline link, string url, ParserContext context, string? anchor, IFileInfo file)
 	{
+		var urlPathPrefix = context.Build.UrlPathPrefix ?? string.Empty;
 		if (url.EndsWith(".md"))
 			url = Path.ChangeExtension(url, ".html");
 
 		if (url.StartsWith("/") && !string.IsNullOrWhiteSpace(urlPathPrefix))
 			url = $"{urlPathPrefix.TrimEnd('/')}{url}";
+		else
+		{
+			var docsetDirectory = context.Configuration.SourceFile.Directory;
+			url = file.FullName.Replace(docsetDirectory!.FullName, string.Empty);
+		}
 
 		link.Url = !string.IsNullOrEmpty(anchor) ? $"{url}#{anchor}" : url;
 	}

tests/Elastic.Markdown.Tests/Inline/AnchorLinkTests.cs

@@ -166,9 +166,8 @@ [Heading inside dropdown](testing/req.md#heading-inside-dropdown)
 	public void GeneratesHtml() =>
 		// language=html
 		Html.Should().Contain(
-			"""<a href="testing/req.html#heading-inside-dropdown">Heading inside dropdown</a>"""
+			"""<a href="/testing/req#heading-inside-dropdown">Heading inside dropdown</a>"""
 		);
-
 	[Fact]
 	public void HasError() => Collector.Diagnostics.Should().HaveCount(0);
 }

tests/Elastic.Markdown.Tests/Inline/InlineImageTest.cs

@@ -37,6 +37,6 @@ public class RelativeInlineImageTest(ITestOutputHelper output) : InlineTest<Link
 	public void GeneratesAttributesInHtml() =>
 		// language=html
 		Html.Should().Contain(
-			"""<p><img src="_static/img/observability.png" alt="Elasticsearch" /></p>"""
+			"""<p><img src="/_static/img/observability.png" alt="Elasticsearch" /></p>"""
 		);
 }

tests/Elastic.Markdown.Tests/Inline/InlineLinkTests.cs

@@ -58,7 +58,11 @@ public class LinkToPageTests(ITestOutputHelper output) : LinkTestBase(output,
 	public void GeneratesHtml() =>
 		// language=html
 		Html.Should().Contain(
+<<<<<<< Updated upstream
 			"""<p><a href="testing/req.html">Requirements</a></p>"""
+=======
+			"""<p><a href="/testing/req">Requirements</a></p>"""
+>>>>>>> Stashed changes
 		);
 
 	[Fact]
@@ -81,7 +85,7 @@ public class InsertPageTitleTests(ITestOutputHelper output) : LinkTestBase(outpu
 	public void GeneratesHtml() =>
 		// language=html
 		Html.Should().Contain(
-			"""<p><a href="testing/req.html">Special Requirements</a></p>"""
+			"""<p><a href="/testing/req">Special Requirements</a></p>"""
 		);
 
 	[Fact]
@@ -106,7 +110,11 @@ public class LinkReferenceTest(ITestOutputHelper output) : LinkTestBase(output,
 	public void GeneratesHtml() =>
 		// language=html
 		Html.Should().Contain(
+<<<<<<< Updated upstream
 			"""<p><a href="testing/req.html">test</a></p>"""
+=======
+			"""<p><a href="/testing/req">test</a></p>"""
+>>>>>>> Stashed changes
 		);
 
 	[Fact]