1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
using System;
using System.Globalization;
using LibGit2Sharp.Core;
using LibGit2Sharp.Core.Handles;
namespace LibGit2Sharp
{
/// <summary>
/// Provides helper overloads to a <see cref = "ReferenceCollection" />.
/// </summary>
public static class ReferenceCollectionExtensions
{
private enum RefState
{
Exists,
DoesNotExistButLooksValid,
DoesNotLookValid,
}
private static RefState TryResolveReference(out Reference reference, ReferenceCollection refsColl, string canonicalName)
{
if (!refsColl.IsValidName(canonicalName))
{
reference = null;
return RefState.DoesNotLookValid;
}
reference = refsColl[canonicalName];
return reference != null ? RefState.Exists : RefState.DoesNotExistButLooksValid;
}
/// <summary>
/// Creates a direct or symbolic reference with the specified name and target
/// </summary>
/// <param name = "name">The name of the reference to create.</param>
/// <param name = "canonicalRefNameOrObjectish">The target which can be either the canonical name of a reference or a revparse spec.</param>
/// <param name = "allowOverwrite">True to allow silent overwriting a potentially existing reference, false otherwise.</param>
/// <param name = "refsColl">The <see cref="ReferenceCollection"/> being worked with.</param>
/// <param name="logMessage">The optional message to log in the <see cref="ReflogCollection"/> when adding the <see cref="Reference"/></param>
/// <returns>A new <see cref = "Reference" />.</returns>
public static Reference Add(this ReferenceCollection refsColl, string name, string canonicalRefNameOrObjectish, bool allowOverwrite = false, string logMessage = null)
{
Ensure.ArgumentNotNullOrEmptyString(name, "name");
Ensure.ArgumentNotNullOrEmptyString(canonicalRefNameOrObjectish, "canonicalRefNameOrObjectish");
Reference reference;
RefState refState = TryResolveReference(out reference, refsColl, canonicalRefNameOrObjectish);
var gitObject = refsColl.repo.Lookup(canonicalRefNameOrObjectish, GitObjectType.Any, LookUpOptions.None);
if (refState == RefState.Exists)
{
return refsColl.Add(name, reference, allowOverwrite, logMessage);
}
if (refState == RefState.DoesNotExistButLooksValid && gitObject == null)
{
using (ReferenceSafeHandle handle = Proxy.git_reference_symbolic_create(refsColl.repo.Handle, name, canonicalRefNameOrObjectish, allowOverwrite))
{
return Reference.BuildFromPtr<Reference>(handle, refsColl.repo);
}
}
Ensure.GitObjectIsNotNull(gitObject, canonicalRefNameOrObjectish);
return refsColl.Add(name, gitObject.Id, allowOverwrite, logMessage);
}
/// <summary>
/// Updates the target of a direct reference.
/// </summary>
/// <param name = "directRef">The direct reference which target should be updated.</param>
/// <param name = "objectish">The revparse spec of the target.</param>
/// <param name = "refsColl">The <see cref="ReferenceCollection"/> being worked with.</param>
/// <param name="logMessage">The optional message to log in the <see cref="ReflogCollection"/> of the <paramref name="directRef"/> reference.</param>
/// <returns>A new <see cref = "Reference" />.</returns>
public static Reference UpdateTarget(this ReferenceCollection refsColl, Reference directRef, string objectish, string logMessage = null)
{
Ensure.ArgumentNotNull(directRef, "directRef");
Ensure.ArgumentNotNull(objectish, "objectish");
GitObject target = refsColl.repo.Lookup(objectish);
Ensure.GitObjectIsNotNull(target, objectish);
return refsColl.UpdateTarget(directRef, target.Id, logMessage);
}
/// <summary>
/// Rename an existing reference with a new name
/// </summary>
/// <param name = "currentName">The canonical name of the reference to rename.</param>
/// <param name = "newName">The new canonical name.</param>
/// <param name = "allowOverwrite">True to allow silent overwriting a potentially existing reference, false otherwise.</param>
/// <param name = "refsColl">The <see cref="ReferenceCollection"/> being worked with.</param>
/// <returns>A new <see cref = "Reference" />.</returns>
public static Reference Move(this ReferenceCollection refsColl, string currentName, string newName, bool allowOverwrite = false)
{
Ensure.ArgumentNotNullOrEmptyString(currentName, "currentName");
Reference reference = refsColl[currentName];
if (reference == null)
{
throw new LibGit2SharpException(
string.Format(CultureInfo.InvariantCulture,
"Reference '{0}' doesn't exist. One cannot move a non existing reference.", currentName));
}
return refsColl.Move(reference, newName, allowOverwrite);
}
/// <summary>
/// Updates the target of a reference.
/// </summary>
/// <param name = "name">The canonical name of the reference.</param>
/// <param name = "canonicalRefNameOrObjectish">The target which can be either the canonical name of a reference or a revparse spec.</param>
/// <param name = "refsColl">The <see cref="ReferenceCollection"/> being worked with.</param>
/// <param name="logMessage">The optional message to log in the <see cref="ReflogCollection"/> of the <paramref name="name"/> reference.</param>
/// <returns>A new <see cref = "Reference" />.</returns>
public static Reference UpdateTarget(this ReferenceCollection refsColl, string name, string canonicalRefNameOrObjectish, string logMessage = null)
{
Ensure.ArgumentNotNullOrEmptyString(name, "name");
Ensure.ArgumentNotNullOrEmptyString(canonicalRefNameOrObjectish, "canonicalRefNameOrObjectish");
if (name == "HEAD")
{
return refsColl.Add("HEAD", canonicalRefNameOrObjectish, true);
}
Reference reference = refsColl[name];
var directReference = reference as DirectReference;
if (directReference != null)
{
return refsColl.UpdateTarget(directReference, canonicalRefNameOrObjectish, logMessage);
}
var symbolicReference = reference as SymbolicReference;
if (symbolicReference != null)
{
Reference targetRef;
RefState refState = TryResolveReference(out targetRef, refsColl, canonicalRefNameOrObjectish);
if (refState == RefState.DoesNotLookValid)
{
throw new ArgumentException(String.Format(CultureInfo.InvariantCulture, "The reference specified by {0} is a Symbolic reference, you must provide a reference canonical name as the target.", name), "canonicalRefNameOrObjectish");
}
return refsColl.UpdateTarget(symbolicReference, targetRef, logMessage);
}
throw new LibGit2SharpException(string.Format(CultureInfo.InvariantCulture, "Reference '{0}' has an unexpected type ('{1}').", name, reference.GetType()));
}
/// <summary>
/// Delete a reference with the specified name
/// </summary>
/// <param name = "refsColl">The <see cref="ReferenceCollection"/> being worked with.</param>
/// <param name = "name">The canonical name of the reference to delete.</param>
public static void Remove(this ReferenceCollection refsColl, string name)
{
Ensure.ArgumentNotNullOrEmptyString(name, "name");
Reference reference = refsColl[name];
if (reference == null)
{
return;
}
refsColl.Remove(reference);
}
}
}
|
