### Quick Example: Discover Repository and Walk File Tree

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/readme.md

This example demonstrates how to use XenoAtom.Glob to discover a repository and walk its working tree while honoring ignore rules. It uses RepositoryDiscovery.Discover and FileTreeWalker.Enumerate with FileTreeWalkOptions. The example prints the relative path of each entry.

```csharp
using XenoAtom.Glob.Git;
using XenoAtom.Glob.IO;

var repository = RepositoryDiscovery.Discover(@"C:\code\my-repo");
var walker = new FileTreeWalker();

// Walk the working tree while honoring the repository ignore rules.
foreach (var entry in walker.Enumerate(repository.WorkingTreeRoot, new FileTreeWalkOptions
{
    RepositoryContext = repository,
}))
{
    Console.WriteLine(entry.RelativePath);
}
```

--------------------------------

### Glob Matching Examples

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Demonstrates various glob patterns including single-segment wildcards, double-star matching across segments, and escaped literals.

```csharp
GlobPattern.Parse("src/*.cs").IsMatch("src/app.cs");        // true
GlobPattern.Parse("src/*.cs").IsMatch("src/lib/app.cs");    // false

GlobPattern.Parse("src/**/app.cs").IsMatch("src/app.cs");       // true
GlobPattern.Parse("src/**/app.cs").IsMatch("src/lib/app.cs");   // true

GlobPattern.Parse(@"data/\*.txt").IsMatch("data/*.txt");    // true
```

--------------------------------

### Path Input Rules Examples

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Shows how to parse a glob pattern and match paths with both forward and backslashes, and how to evaluate ignore rules with and without the isDirectory flag.

```csharp
var pattern = GlobPattern.Parse("src/**/file.cs");

pattern.IsMatch("src/nested/file.cs");    // true
pattern.IsMatch(@"src\nested\file.cs");   // true

var matcher = new IgnoreMatcher(IgnoreRuleSet.ParseGitIgnore("build/\n"));

matcher.Evaluate("build", isDirectory: true).IsIgnored; // true
matcher.Evaluate("build").IsIgnored;                    // false
```

--------------------------------

### Discover Git repository with RepositoryDiscovery

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Use RepositoryDiscovery.Discover to get repository information from a path inside a working tree. The returned object exposes WorkingTreeRoot, GitDirectory, InfoExcludePath, and GlobalExcludePath. Supports normal .git directories, gitfiles, and exclude files.

```csharp
using XenoAtom.Glob.Git;

var repository = RepositoryDiscovery.Discover(@"C:\code\my-repo\src");

Console.WriteLine(repository.WorkingTreeRoot);
Console.WriteLine(repository.GitDirectory);
Console.WriteLine(repository.InfoExcludePath);
Console.WriteLine(repository.GlobalExcludePath);
```

--------------------------------

### Parse Git ignore rules and evaluate paths

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Parses a Git-compatible ignore rule set and evaluates sample paths. The last matching rule wins; negated rules start with '!'. A directory ignored by an ancestor rule blocks deeper children unless the directory itself is made reachable again.

```csharp
using XenoAtom.Glob.Ignore;

var ruleSet = IgnoreRuleSet.ParseGitIgnore("""
    *.tmp
    build/
    !build/keep.tmp
    src/generated/*
    !src/generated/include.txt
    """);

var matcher = new IgnoreMatcher(ruleSet);

matcher.Evaluate("file.tmp").IsIgnored;                  // true
matcher.Evaluate("build/output.bin").IsIgnored;          // true
matcher.Evaluate("build/keep.tmp").IsIgnored;            // true
matcher.Evaluate("src/generated/code.cs").IsIgnored;     // true
matcher.Evaluate("src/generated/include.txt").IsIgnored; // false
```

--------------------------------

### Build and test commands

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/AGENTS.md

Run from the project root. Builds the solution in Release configuration and runs all tests. All tests must pass before submitting.

```sh
cd src
dotnet build -c Release
dotnet test -c Release
```

--------------------------------

### Common .gitignore rule forms

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Demonstrates typical .gitignore patterns: *.log, bin/, foo/*, foo/**, !foo/keep.txt, /root-only.txt, and docs/**/*.bak. Each pattern's meaning is explained in the surrounding list.

```csharp
var matcher = new IgnoreMatcher(IgnoreRuleSet.ParseGitIgnore("""
    *.log
    bin/
    foo/*
    foo/**
    !foo/keep.txt
    /root-only.txt
    docs/**/*.bak
    """));
```

--------------------------------

### Enumerate files with FileTreeWalker

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Use FileTreeWalker.Enumerate with a RepositoryContext to walk the working tree, optionally including directories. The walker traverses lazily, prunes ignored directories, and returns normalized relative paths with metadata.

```csharp
using XenoAtom.Glob.Git;
using XenoAtom.Glob.IO;

var repository = RepositoryDiscovery.Discover(@"C:\code\my-repo");
var walker = new FileTreeWalker();

foreach (var entry in walker.Enumerate(repository.WorkingTreeRoot, new FileTreeWalkOptions
{
    RepositoryContext = repository,
    IncludeDirectories = true,
}))
{
    Console.WriteLine($"{entry.RelativePath} | dir={entry.IsDirectory}");
}
```

--------------------------------

### Layering multiple rule sets with baseDirectory

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Shows how to combine multiple IgnoreRuleSet instances; later rule sets have higher precedence. Use baseDirectory when a rule set comes from a nested directory such as src/.gitignore.

```csharp
var rootRules = IgnoreRuleSet.ParseGitIgnore("*.tmp");
var nestedRules = IgnoreRuleSet.ParseGitIgnore("!keep.tmp", baseDirectory: "src");

var matcher = new IgnoreMatcher(rootRules, nestedRules);

matcher.Evaluate("src/keep.tmp").IsIgnored;   // false
matcher.Evaluate("other/keep.tmp").IsIgnored; // true
```

--------------------------------

### Glob Matching with GlobPattern

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Parses a glob pattern with character classes and wildcards, then matches several paths to demonstrate case sensitivity and segment matching.

```csharp
using XenoAtom.Glob;

var pattern = GlobPattern.Parse("src/**/[Tt]est?.cs");

pattern.IsMatch("src/unit/Test1.cs");     // true
pattern.IsMatch("src/unit/test2.cs");     // true
pattern.IsMatch("src/unit/test20.cs");    // false
```

--------------------------------

### Add extra ignore rule sets during traversal

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Parse additional .gitignore rules with IgnoreRuleSet.ParseGitIgnore and pass them via AdditionalRuleSets. Later rule sets have higher precedence than earlier ones.

```csharp
var extraRules = IgnoreRuleSet.ParseGitIgnore("""
    *.cache
    artifacts/
    """);

var entries = walker.Enumerate(rootPath, new FileTreeWalkOptions
{
    RepositoryContext = repository,
    AdditionalRuleSets = [extraRules],
});
```

--------------------------------

### Explicit dialect selection with IgnoreRuleSet.Parse

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Uses IgnoreRuleSet.Parse with IgnoreDialect.IgnoreFile for explicit dialect selection. Currently .ignore parsing uses the same semantics as the Git-compatible parser.

```csharp
var ignoreRules = IgnoreRuleSet.Parse("""
    *.cache
    artifacts/
    """, IgnoreDialect.IgnoreFile);
```

--------------------------------

### IgnoreMatcher Constructor

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Creates an IgnoreMatcher from one or more IgnoreRuleSet instances. Later rule sets have higher precedence.

```APIDOC
## IgnoreMatcher Constructor

### Description
Creates an IgnoreMatcher from one or more IgnoreRuleSet instances. Later rule sets have higher precedence.

### Parameters
- **ruleSets** (params IgnoreRuleSet[]) - Required - One or more rule sets to combine.

### Example
```csharp
var rootRules = IgnoreRuleSet.ParseGitIgnore("*.tmp");
var nestedRules = IgnoreRuleSet.ParseGitIgnore("!keep.tmp", baseDirectory: "src");
var matcher = new IgnoreMatcher(rootRules, nestedRules);
```
```

--------------------------------

### Directory blocking vs wildcard re-inclusion

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Shows that ignoring a directory (build/) blocks re-inclusion of children even with a negated rule, while ignoring its contents (build/*) allows re-inclusion. This is standard Git behavior and a common surprise.

```csharp
var blocked = new IgnoreMatcher(IgnoreRuleSet.ParseGitIgnore("""
    build/
    !build/keep.tmp
    """));

blocked.Evaluate("build/keep.tmp").IsIgnored; // true

var reachable = new IgnoreMatcher(IgnoreRuleSet.ParseGitIgnore("""
    build/*
    !build/keep.tmp
    """));

reachable.Evaluate("build/keep.tmp").IsIgnored; // false
```

--------------------------------

### IgnoreRuleSet.ParseGitIgnore

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Parses Git-compatible ignore content into an IgnoreRuleSet. This is the primary entry point for creating ignore rules from .gitignore-style text.

```APIDOC
## IgnoreRuleSet.ParseGitIgnore

### Description
Parses Git-compatible ignore content into an IgnoreRuleSet. This is the primary entry point for creating ignore rules from .gitignore-style text.

### Method
ParseGitIgnore

### Parameters
- **content** (string) - Required - The Git-compatible ignore content to parse.

### Returns
- **IgnoreRuleSet** - The parsed rule set.

### Example
```csharp
var ruleSet = IgnoreRuleSet.ParseGitIgnore("""
    *.tmp
    build/
    !build/keep.tmp
    src/generated/*
    !src/generated/include.txt
    """);
```
```

--------------------------------

### IgnoreMatcher.Evaluate

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Evaluates a path against the ignore rules and returns an evaluation result indicating whether the path is ignored. This is the core method for checking if a path should be ignored.

```APIDOC
## IgnoreMatcher.Evaluate

### Description
Evaluates a path against the ignore rules and returns an evaluation result indicating whether the path is ignored. This is the core method for checking if a path should be ignored.

### Method
Evaluate

### Parameters
- **path** (string) - Required - The path to evaluate.

### Returns
- **IgnoreEvaluation** - An object with an `IsIgnored` property indicating whether the path is ignored.

### Example
```csharp
var matcher = new IgnoreMatcher(ruleSet);
matcher.Evaluate("file.tmp").IsIgnored; // true
```
```

--------------------------------

### Path separators in ignore matching

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Shows that ignore rule syntax uses '/', but candidate paths can use either '/' or '\'. Both evaluate to ignored for the same rule.

```csharp
var matcher = new IgnoreMatcher(IgnoreRuleSet.ParseGitIgnore("src/generated/\n"));

matcher.Evaluate("src/generated/file.cs").IsIgnored;   // true
matcher.Evaluate(@"src\generated\file.cs").IsIgnored;  // true
```

--------------------------------

### IgnoreRuleSet.Parse

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Parses ignore content with an explicit dialect selection. Currently supports the IgnoreFile dialect which uses the same semantics as the Git-compatible parser.

```APIDOC
## IgnoreRuleSet.Parse

### Description
Parses ignore content with an explicit dialect selection. Currently supports the IgnoreFile dialect which uses the same semantics as the Git-compatible parser.

### Parameters
- **content** (string) - Required - The ignore content to parse.
- **dialect** (IgnoreDialect) - Required - The dialect to use for parsing.

### Returns
- **IgnoreRuleSet** - The parsed rule set.

### Example
```csharp
var ignoreRules = IgnoreRuleSet.Parse("""
    *.cache
    artifacts/
    """, IgnoreDialect.IgnoreFile);
```
```

--------------------------------

### Reusing an evaluator on hot paths

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Uses IgnoreMatcher.CreateEvaluator() to keep pooled scratch buffers across calls and avoid rebuilding temporary state when evaluating many paths repeatedly.

```csharp
var matcher = new IgnoreMatcher(IgnoreRuleSet.ParseGitIgnore("""
    *.tmp
    vendor/
    """));

using var evaluator = matcher.CreateEvaluator();

foreach (var path in paths)
{
    if (evaluator.Evaluate(path).IsIgnored)
    {
        // skip
    }
}
```

--------------------------------

### IgnoreMatcher.CreateEvaluator

Source: https://github.com/xenoatom/xenoatom.glob/blob/main/doc/readme.md

Creates an evaluator for hot paths that reuses pooled scratch buffers across calls, avoiding rebuilding temporary state each time.

```APIDOC
## IgnoreMatcher.CreateEvaluator

### Description
Creates an evaluator for hot paths that reuses pooled scratch buffers across calls, avoiding rebuilding temporary state each time.

### Returns
- **IgnoreEvaluator** - An evaluator that can be used to evaluate paths efficiently.

### Example
```csharp
using var evaluator = matcher.CreateEvaluator();
foreach (var path in paths)
{
    if (evaluator.Evaluate(path).IsIgnored)
    {
        // skip
    }
}
```
```