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using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.Linq;
using LibGit2Sharp.Core;
using LibGit2Sharp.Core.Handles;
namespace LibGit2Sharp
{
/// <summary>
/// The collection of submodules in a <see cref = "Repository" />
/// </summary>
[DebuggerDisplay("{DebuggerDisplay,nq}")]
public class SubmoduleCollection : IEnumerable<Submodule>
{
internal readonly Repository repo;
/// <summary>
/// Needed for mocking purposes.
/// </summary>
protected SubmoduleCollection()
{ }
/// <summary>
/// Initializes a new instance of the <see cref = "LibGit2Sharp.SubmoduleCollection" /> class.
/// </summary>
/// <param name = "repo">The repo.</param>
internal SubmoduleCollection(Repository repo)
{
this.repo = repo;
}
/// <summary>
/// Gets the <see cref = "LibGit2Sharp.Submodule" /> with the specified name.
/// </summary>
public virtual Submodule this[string name]
{
get
{
Ensure.ArgumentNotNullOrEmptyString(name, "name");
return Lookup(name, handle =>
new Submodule(repo, name,
Proxy.git_submodule_path(handle),
Proxy.git_submodule_url(handle)));
}
}
/// <summary>
/// Returns an enumerator that iterates through the collection.
/// </summary>
/// <returns>An <see cref = "IEnumerator{T}" /> object that can be used to iterate through the collection.</returns>
public IEnumerator<Submodule> GetEnumerator()
{
return Proxy.git_submodule_foreach(repo.Handle, (h, n) => Utf8Marshaler.FromNative(n))
.Select(n => this[n])
.GetEnumerator();
}
/// <summary>
/// Returns an enumerator that iterates through the collection.
/// </summary>
/// <returns>An <see cref = "IEnumerator" /> object that can be used to iterate through the collection.</returns>
IEnumerator IEnumerable.GetEnumerator()
{
return GetEnumerator();
}
internal bool TryStage(string relativePath, bool writeIndex)
{
return Lookup(relativePath, handle =>
{
if (handle == null)
return false;
Proxy.git_submodule_add_to_index(handle, writeIndex);
return true;
});
}
internal T Lookup<T>(string name, Func<SubmoduleSafeHandle, T> selector, bool throwIfNotFound = false)
{
using (var handle = Proxy.git_submodule_lookup(repo.Handle, name))
{
if (handle != null)
{
Proxy.git_submodule_reload(handle);
return selector(handle);
}
if (throwIfNotFound)
{
throw new LibGit2SharpException(string.Format(
CultureInfo.InvariantCulture,
"Submodule lookup failed for '{0}'.", name));
}
return default(T);
}
}
private string DebuggerDisplay
{
get
{
return string.Format(CultureInfo.InvariantCulture,
"Count = {0}", this.Count());
}
}
}
}
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