Support for :slug in permalinks

src/Pretzel.Logic/Templating/Context/LinkHelper.cs

@@ -5,6 +5,7 @@
 using System.IO;
 using System.Linq;
 using System.Text.RegularExpressions;
+using Pretzel.Logic.Extensibility.Extensions;
 
 namespace Pretzel.Logic.Templating.Context
 {
@@ -52,6 +53,7 @@ public string EvaluatePermalink(string permalink, Page page)
  permalink = permalink.Replace(":short_year", page.Date.ToString("yy"));
  permalink = permalink.Replace(":i_month", page.Date.Month.ToString());
  permalink = permalink.Replace(":i_day", page.Date.Day.ToString());
+ permalink = permalink.Replace(":slug", SlugifyFilter.Slugify(GetSlugFromFrontMatter(page) ?? GetTitle(page.File)));
 
  if (permalink.Contains(":category"))
  {
@@ -113,5 +115,12 @@ private string GetPageTitle(string file)
  {
  return Path.GetFileNameWithoutExtension(file);
  }
+
+ private string GetSlugFromFrontMatter(Page page)
+ {
+ object slug;
+ page.Bag.TryGetValue("slug", out slug);
+ return slug as string;
+ }
  }
 }

src/Pretzel.Tests/Templating/Context/LinkHelperTest.cs

@@ -69,14 +69,16 @@ public void EvaluateLink_url_is_well_formatted(string filePath, string expectedU
  [InlineData("/:category3/:title.html", "/foobar-baz.html", "cat1,cat2")]
  [InlineData("/:categories/:title/", "/cat1/cat2/foobar-baz/", "cat1,cat2")]
  [InlineData("/:categories/:title", "/cat1/cat2/foobar-baz/", "cat1,cat2")]
+ [InlineData("/:year-:month-:day/:slug.html", "/2015-03-09/foobar-baz.html", "")]
  [Theory]
  public void EvaluatePermalink_url_is_well_formatted(string permalink, string expectedUrl, string categories)
  {
  var page = new Page
  {
  Categories = categories == null ? Enumerable.Empty<string>() : categories.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries),
  Date = new DateTime(2015, 03, 09),
- File = @"C:\temp\2015-03-09-foobar-baz.md"
+ File = @"C:\temp\2015-03-09-foobar-baz.md",
+ Title = "Foobar baz"
  };
 
  Assert.Equal(expectedUrl, LinkHelper.EvaluatePermalink(permalink, page));

src/Pretzel.Tests/Templating/Context/SiteContextGeneratorTests.cs

@@ -1129,6 +1129,7 @@ public void permalink_with_folder_categories_frontmatter_only()
  [InlineData("/:category1/:title.html", "/cat1/foobar-baz.html", "cat1,cat2")]
  [InlineData("/:category2/:title.html", "/cat2/foobar-baz.html", "cat1,cat2")]
  [InlineData("/:category3/:title.html", "/foobar-baz.html", "cat1,cat2")]
+ [InlineData("/:year-:month-:day/:slug.html", "/2015-03-09/foobar-baz.html", "")]
  [Theory]
  public void permalink_is_well_formatted(string permalink, string expectedUrl, string categories)
  {
@@ -1143,6 +1144,20 @@ public void permalink_is_well_formatted(string permalink, string expectedUrl, st
  Assert.Equal(expectedUrl, firstPost.Url);
  }
 
+ [Fact]
+ public void permalink_supports_custom_slug()
+ {
+ var generator = new SiteContextGenerator(fileSystem, new LinkHelper(), new ConfigurationMock(string.Format("permalink: {0}", "/:year-:month-:day/:slug.html")));
+ fileSystem.AddFile(@"C:\TestSite\_posts\2015-03-09-foobar-baz.md", new MockFileData(@"---
+slug: my-slug
+---# Title"));
+
+ // act
+ var siteContext = generator.BuildContext(@"C:\TestSite", @"C:\TestSite\_site", false);
+ var firstPost = siteContext.Posts.First();
+ Assert.Equal("/2015-03-09/my-slug.html", firstPost.Url);
+ }
+
  private class BeforeProcessingTransformMock : IBeforeProcessingTransform
  {
  public int PostCount = 0;

src/Pretzel.Tests/Templating/Jekyll/LiquidEngineTests.cs

@@ -1984,6 +1984,7 @@ public void The_File_Should_Display_The_Next_Page_Url()
  [InlineData("/:category1/:title.html", @"cat1/\foobar-baz.html", "cat1,cat2")]
  [InlineData("/:category2/:title.html", @"cat2\foobar-baz.html", "cat1,cat2")]
  [InlineData("/:category3/:title.html", @"foobar-baz.html", "cat1,cat2")]
+ [InlineData("/:year-:month-:day/:slug.html", @"2015-03-09\foobar-baz.html", "")]
  [Theory]
  public void Permalink_generates_expected_file_path(string permalink, string expectedUrl, string categories)
  {