Add initial support for page level annotations for product support

docs/source/markup/applies.md

@@ -0,0 +1,48 @@
+---
+title: Product Availability
+applies:
+  stack: ga 8.1
+  serverless: tech-preview
+  hosted: beta 8.1.1
+  eck: beta 3.0.2
+  ece: unavailable
+---
+
+
+Using yaml frontmatter pages can explicitly indicate to each deployment targets availability and lifecycle status
+
+
+```yaml
+applies:
+  stack: ga 8.1
+  serverless: tech-preview
+  hosted: beta 8.1.1
+  eck: beta 3.0.2
+  ece: unavailable
+```
+
+Its syntax is
+
+```
+ <product>: <lifecycle> [version]
+```
+
+Where version is optional.
+
+`all` and empty string mean generally available for all active versions
+
+```yaml
+applies:
+  stack: 
+  serverless: all
+```
+
+`all` and empty string can also be specified at a version level
+
+```yaml
+applies:
+  stack: beta all
+  serverless: beta
+```
+
+Are equivalent, note `all` just means we won't be rendering the version portion in the html.

src/Elastic.Markdown/Helpers/SemVersion.cs

@@ -11,7 +11,7 @@ namespace Elastic.Markdown.Helpers;
 /// <summary>
 /// A semver2 compatible version.
 /// </summary>
-public sealed class SemVersion :
+public class SemVersion :
 	IEquatable<SemVersion>,
 	IComparable<SemVersion>,
 	IComparable
@@ -92,6 +92,14 @@ public SemVersion(int major, int minor, int patch, string? prerelease, string? m
 		Metadata = metadata ?? string.Empty;
 	}
 
+	public static explicit operator SemVersion(string b)
+	{
+		var semVersion = TryParse(b, out var version) ? version : TryParse(b + ".0", out version) ? version : null;
+		return semVersion ?? throw new ArgumentException($"'{b}' is not a valid semver2 version string.");
+	}
+
+	public static implicit operator string(SemVersion d) => d.ToString();
+
 	/// <summary>
 	///
 	/// </summary>

src/Elastic.Markdown/IO/MarkdownFile.cs

@@ -5,6 +5,7 @@
 using Elastic.Markdown.Diagnostics;
 using Elastic.Markdown.Myst;
 using Elastic.Markdown.Myst.Directives;
+using Elastic.Markdown.Myst.FrontMatter;
 using Elastic.Markdown.Slices;
 using Markdig;
 using Markdig.Extensions.Yaml;

src/Elastic.Markdown/Myst/Directives/IncludeBlock.cs

@@ -4,6 +4,7 @@
 using System.IO.Abstractions;
 using Elastic.Markdown.Diagnostics;
 using Elastic.Markdown.IO;
+using Elastic.Markdown.Myst.FrontMatter;
 
 namespace Elastic.Markdown.Myst.Directives;
 

src/Elastic.Markdown/Myst/FrontMatter/AllVersions.cs

@@ -0,0 +1,50 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+using Elastic.Markdown.Helpers;
+using YamlDotNet.Core;
+using YamlDotNet.Core.Events;
+using YamlDotNet.Serialization;
+
+namespace Elastic.Markdown.Myst.FrontMatter;
+
+public class AllVersions() : SemVersion(9999, 9999, 9999)
+{
+	public static AllVersions Instance { get; } = new ();
+}
+
+public class SemVersionConverter : IYamlTypeConverter
+{
+	public bool Accepts(Type type) => type == typeof(SemVersion);
+
+	public object? ReadYaml(IParser parser, Type type, ObjectDeserializer rootDeserializer)
+	{
+		var value = parser.Consume<Scalar>();
+		if (string.IsNullOrWhiteSpace(value.Value))
+			return AllVersions.Instance;
+		if (string.Equals(value.Value.Trim(), "all", StringComparison.InvariantCultureIgnoreCase))
+			return AllVersions.Instance;
+		return (SemVersion)value.Value;
+	}
+
+	public void WriteYaml(IEmitter emitter, object? value, Type type, ObjectSerializer serializer)
+	{
+		if (value == null)
+			return;
+		emitter.Emit(new Scalar(value.ToString()!));
+	}
+
+	public static bool TryParse(string? value, out SemVersion? version)
+	{
+		version = value?.Trim().ToLowerInvariant() switch
+		{
+			null => AllVersions.Instance,
+			"all" => AllVersions.Instance,
+			"" => AllVersions.Instance,
+			_ => SemVersion.TryParse(value, out var v) ? v : SemVersion.TryParse(value + ".0", out v) ? v : null
+		};
+		return version is not null;
+	}
+}
+

src/Elastic.Markdown/Myst/FrontMatter/Deployment.cs

@@ -0,0 +1,120 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+using YamlDotNet.Core;
+using YamlDotNet.Core.Events;
+using YamlDotNet.Serialization;
+
+namespace Elastic.Markdown.Myst.FrontMatter;
+
+[YamlSerializable]
+public record Deployment
+{
+	[YamlMember(Alias = "self")]
+	public SelfManagedDeployment? SelfManaged { get; set; }
+
+	[YamlMember(Alias = "cloud")]
+	public CloudManagedDeployment? Cloud { get; set; }
+
+	public static Deployment All { get; } = new()
+	{
+		Cloud = CloudManagedDeployment.All,
+		SelfManaged = SelfManagedDeployment.All
+	};
+}
+
+[YamlSerializable]
+public record SelfManagedDeployment
+{
+	[YamlMember(Alias = "stack")]
+	public ProductAvailability? Stack { get; set; }
+
+	[YamlMember(Alias = "ece")]
+	public ProductAvailability? Ece { get; set; }
+
+	[YamlMember(Alias = "eck")]
+	public ProductAvailability? Eck { get; set; }
+
+	public static SelfManagedDeployment All { get; } = new()
+	{
+		Stack = ProductAvailability.GenerallyAvailable,
+		Ece = ProductAvailability.GenerallyAvailable,
+		Eck = ProductAvailability.GenerallyAvailable
+	};
+}
+
+[YamlSerializable]
+public record CloudManagedDeployment
+{
+	[YamlMember(Alias = "hosted")]
+	public ProductAvailability? Hosted { get; set; }
+
+	[YamlMember(Alias = "serverless")]
+	public ProductAvailability? Serverless { get; set; }
+
+	public static CloudManagedDeployment All { get; } = new()
+	{
+		Hosted = ProductAvailability.GenerallyAvailable,
+		Serverless = ProductAvailability.GenerallyAvailable
+	};
+
+}
+
+public class DeploymentConverter : IYamlTypeConverter
+{
+	public bool Accepts(Type type) => type == typeof(Deployment);
+
+	public object? ReadYaml(IParser parser, Type type, ObjectDeserializer rootDeserializer)
+	{
+		if (parser.TryConsume<Scalar>(out var value))
+		{
+			if (string.IsNullOrWhiteSpace(value.Value))
+				return Deployment.All;
+			if (string.Equals(value.Value, "all", StringComparison.InvariantCultureIgnoreCase))
+				return Deployment.All;
+		}
+		var x = rootDeserializer.Invoke(typeof(Dictionary<string, string>));
+		if (x is not Dictionary<string, string> { Count: > 0 } dictionary)
+			return null;
+
+		var deployment = new Deployment();
+
+		if (TryGetVersion("stack", out var version))
+		{
+			deployment.SelfManaged ??= new SelfManagedDeployment();
+			deployment.SelfManaged.Stack = version;
+		}
+		if (TryGetVersion("ece", out version))
+		{
+			deployment.SelfManaged ??= new SelfManagedDeployment();
+			deployment.SelfManaged.Ece = version;
+		}
+		if (TryGetVersion("eck", out version))
+		{
+			deployment.SelfManaged ??= new SelfManagedDeployment();
+			deployment.SelfManaged.Eck = version;
+		}
+		if (TryGetVersion("hosted", out version))
+		{
+			deployment.Cloud ??= new CloudManagedDeployment();
+			deployment.Cloud.Hosted = version;
+		}
+		if (TryGetVersion("serverless", out version))
+		{
+			deployment.Cloud ??= new CloudManagedDeployment();
+			deployment.Cloud.Serverless = version;
+		}
+		return deployment;
+
+		bool TryGetVersion(string key, out ProductAvailability? semVersion)
+		{
+			semVersion = null;
+			return dictionary.TryGetValue(key, out var v) && ProductAvailability.TryParse(v, out semVersion);
+		}
+
+	}
+
+	public void WriteYaml(IEmitter emitter, object? value, Type type, ObjectSerializer serializer) =>
+		serializer.Invoke(value, type);
+}

src/Elastic.Markdown/Myst/FrontMatterParser.cs → src/Elastic.Markdown/Myst/FrontMatter/FrontMatterParser.cs

@@ -1,10 +1,10 @@
 // Licensed to Elasticsearch B.V under one or more agreements.
 // Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
 // See the LICENSE file in the project root for more information
+
 using YamlDotNet.Serialization;
-using YamlDotNet.Serialization.NamingConventions;
 
-namespace Elastic.Markdown.Myst;
+namespace Elastic.Markdown.Myst.FrontMatter;
 
 [YamlStaticContext]
 public partial class YamlFrontMatterStaticContext;
@@ -20,6 +20,10 @@ public class YamlFrontMatter
 
 	[YamlMember(Alias = "sub")]
 	public Dictionary<string, string>? Properties { get; set; }
+
+
+	[YamlMember(Alias = "applies")]
+	public Deployment? AppliesTo { get; set; }
 }
 
 public static class FrontMatterParser
@@ -30,10 +34,13 @@ public static YamlFrontMatter Deserialize(string yaml)
 
 		var deserializer = new StaticDeserializerBuilder(new YamlFrontMatterStaticContext())
 			.IgnoreUnmatchedProperties()
+			.WithTypeConverter(new SemVersionConverter())
+			.WithTypeConverter(new DeploymentConverter())
 			.Build();
 
 		var frontMatter = deserializer.Deserialize<YamlFrontMatter>(input);
 		return frontMatter;
 
 	}
 }
+

src/Elastic.Markdown/Myst/FrontMatter/ProductAvailability.cs

@@ -0,0 +1,61 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+using Elastic.Markdown.Helpers;
+using YamlDotNet.Serialization;
+
+namespace Elastic.Markdown.Myst.FrontMatter;
+
+[YamlSerializable]
+public record ProductAvailability
+{
+	public ProductLifecycle Lifecycle { get; init; }
+	public SemVersion? Version { get; init; }
+
+	public static ProductAvailability GenerallyAvailable { get; } = new()
+	{
+		Lifecycle = ProductLifecycle.GenerallyAvailable, Version = AllVersions.Instance
+	};
+
+	// <lifecycle> [version]
+	public static bool TryParse(string? value, out ProductAvailability? availability)
+	{
+		if (string.IsNullOrWhiteSpace(value) || string.Equals(value.Trim(), "all", StringComparison.InvariantCultureIgnoreCase))
+		{
+			availability = GenerallyAvailable;
+			return true;
+		}
+
+		var tokens = value.Split(" ", StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);
+		if (tokens.Length < 1)
+		{
+			availability = null;
+			return false;
+		}
+		var lifecycle = tokens[0].ToLowerInvariant() switch
+		{
+			"preview" => ProductLifecycle.TechnicalPreview,
+			"tech-preview" => ProductLifecycle.TechnicalPreview,
+			"beta" => ProductLifecycle.Beta,
+			"dev" => ProductLifecycle.Development,
+			"development" => ProductLifecycle.Development,
+			"deprecated" => ProductLifecycle.Deprecated,
+			"coming" => ProductLifecycle.Coming,
+			"discontinued" => ProductLifecycle.Discontinued,
+			"unavailable" => ProductLifecycle.Unavailable,
+			"ga" => ProductLifecycle.GenerallyAvailable,
+			_ => throw new ArgumentOutOfRangeException(nameof(tokens), tokens, $"Unknown product lifecycle: {tokens[0]}")
+		};
+
+		var version = tokens.Length < 2 ? null : tokens[1] switch
+		{
+			null => AllVersions.Instance,
+			"all" => AllVersions.Instance,
+			"" => AllVersions.Instance,
+			var t => SemVersionConverter.TryParse(t, out var v) ? v : null
+		};
+		availability = new ProductAvailability { Version = version, Lifecycle = lifecycle };
+		return true;
+	}
+}

src/Elastic.Markdown/Myst/FrontMatter/ProductLifecycle.cs

@@ -0,0 +1,36 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+using YamlDotNet.Serialization;
+
+namespace Elastic.Markdown.Myst.FrontMatter;
+
+[YamlSerializable]
+public enum ProductLifecycle
+{
+	// technical preview (exists in current docs system per https://github.com/elastic/docs?tab=readme-ov-file#beta-dev-and-preview-experimental)
+	[YamlMember(Alias = "preview")]
+	TechnicalPreview,
+	// beta (ditto)
+	[YamlMember(Alias = "beta")]
+	Beta,
+	// dev (ditto, though it's uncertain whether it's ever used or still needed)
+	[YamlMember(Alias = "development")]
+	Development,
+	// deprecated (exists in current docs system per https://github.com/elastic/docs?tab=readme-ov-file#additions-and-deprecations)
+	[YamlMember(Alias = "deprecated")]
+	Deprecated,
+	// coming (ditto)
+	[YamlMember(Alias = "coming")]
+	Coming,
+	// discontinued (historically we've immediately removed content when the feature ceases to be supported, but this might not be the case with pages that contain information that spans versions)
+	[YamlMember(Alias = "discontinued")]
+	Discontinued,
+	// unavailable (for content that doesn't exist in a specific context and is never coming or not coming anytime soon)
+	[YamlMember(Alias = "unavailable")]
+	Unavailable,
+	// ga (replaces "added" in the current docs system since it was not entirely clear how/if that overlapped with beta/preview states)
+	[YamlMember(Alias = "ga")]
+	GenerallyAvailable
+}