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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>
/// Initialize specified submodule.
/// <para>
/// Existing entries in the config file for this submodule are not be
/// modified unless <paramref name="overwrite"/> is true.
/// </para>
/// </summary>
/// <param name="name">The name of the submodule to update.</param>
/// <param name="overwrite">Overwrite existing entries.</param>
public virtual void Init(string name, bool overwrite)
{
using (var handle = Proxy.git_submodule_lookup(repo.Handle, name))
{
if (handle == null)
{
throw new NotFoundException(string.Format(
CultureInfo.InvariantCulture,
"Submodule lookup failed for '{0}'.", name));
}
Proxy.git_submodule_init(handle, overwrite);
}
}
/// <summary>
/// Update specified submodule.
/// <para>
/// This will:
/// 1) Optionally initialize the if it not already initialzed,
/// 2) clone the sub repository if it has not already been cloned, and
/// 3) checkout the commit ID for the submodule in the sub repository.
/// </para>
/// </summary>
/// <param name="name">The name of the submodule to update.</param>
/// <param name="options">Options controlling submodule udpate behavior and callbacks.</param>
public virtual void Update(string name, SubmoduleUpdateOptions options)
{
options = options ?? new SubmoduleUpdateOptions();
using (var handle = Proxy.git_submodule_lookup(repo.Handle, name))
{
if (handle == null)
{
throw new NotFoundException(string.Format(
CultureInfo.InvariantCulture,
"Submodule lookup failed for '{0}'.", name));
}
using (GitCheckoutOptsWrapper checkoutOptionsWrapper = new GitCheckoutOptsWrapper(options))
{
var gitCheckoutOptions = checkoutOptionsWrapper.Options;
var remoteCallbacks = new RemoteCallbacks(options);
var gitRemoteCallbacks = remoteCallbacks.GenerateCallbacks();
var gitSubmoduleUpdateOpts = new GitSubmoduleOptions
{
Version = 1,
CheckoutOptions = gitCheckoutOptions,
RemoteCallbacks = gitRemoteCallbacks,
CloneCheckoutStrategy = CheckoutStrategy.GIT_CHECKOUT_SAFE
};
Proxy.git_submodule_update(handle, options.Init, ref gitSubmoduleUpdateOpts);
}
}
}
/// <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 virtual IEnumerator<Submodule> GetEnumerator()
{
return Proxy.git_submodule_foreach(repo.Handle, (h, n) => LaxUtf8Marshaler.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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