-
-
Notifications
You must be signed in to change notification settings - Fork 5.5k
/
tree.jl
194 lines (166 loc) · 6.16 KB
/
tree.jl
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
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
# This file is a part of Julia. License is MIT: https://julialang.org/license
function GitTree(c::GitCommit)
tree_out = Ref{Ptr{Cvoid}}(C_NULL)
@check ccall((:git_commit_tree, :libgit2), Cint, (Ptr{Ptr{Cvoid}}, Ptr{Cvoid}), tree_out, c)
GitTree(repository(c), tree_out[])
end
"""
treewalk(f, tree::GitTree, post::Bool=false)
Traverse the entries in `tree` and its subtrees in post or pre order. Preorder
means beginning at the root and then traversing the leftmost subtree (and
recursively on down through that subtree's leftmost subtrees) and moving right
through the subtrees. Postorder means beginning at the bottom of the leftmost
subtree, traversing upwards through it, then traversing the next right subtree
(again beginning at the bottom) and finally visiting the tree root last of all.
The function parameter `f` should have following signature:
(String, GitTreeEntry) -> Cint
A negative value returned from `f` stops the tree walk. A positive value means
that the entry will be skipped if `post` is `false`.
"""
function treewalk(f, tree::GitTree, post::Bool = false)
ensure_initialized()
# NOTE: don't use @check/GitError directly, because the code can be arbitrary
payload = Any[ tree, f ]
cbf = @cfunction(function treewalk_callback(root_cstr::Cstring, entry_ptr::Ptr{Cvoid}, payload::Vector{Any})::Cint
# decode arguments
root = unsafe_string(root_cstr)
tree = payload[1]::GitTree
f = payload[2]
entry = GitTreeEntry(tree, entry_ptr, false)
return f(root, entry)
end, Cint, (Cstring, Ptr{Cvoid}, Ref{Vector{Any}}))
err = ccall((:git_tree_walk, :libgit2), Cint,
(Ptr{Cvoid}, Cint, Ptr{Cvoid}, Any),
tree.ptr, post, cbf, payload)
if err < 0
err_class, _ = Error.last_error()
if err_class != Error.Callback
# now we now the code is valid
throw(GitError(err))
end
end
nothing
end
repository(tree::GitTree) = tree.owner
repository(te::GitTreeEntry) = repository(te.owner)
"""
filename(te::GitTreeEntry)
Return the filename of the object on disk to which `te` refers.
"""
function filename(te::GitTreeEntry)
ensure_initialized()
str = ccall((:git_tree_entry_name, :libgit2), Cstring, (Ptr{Cvoid},), te.ptr)
str != C_NULL && return unsafe_string(str)
return nothing
end
"""
filemode(te::GitTreeEntry) -> Cint
Return the UNIX filemode of the object on disk to which `te` refers as an integer.
"""
function filemode(te::GitTreeEntry)
ensure_initialized()
return ccall((:git_tree_entry_filemode, :libgit2), Cint, (Ptr{Cvoid},), te.ptr)
end
"""
entrytype(te::GitTreeEntry)
Return the type of the object to which `te` refers. The result will be
one of the types which [`objtype`](@ref) returns, e.g. a `GitTree` or `GitBlob`.
"""
function entrytype(te::GitTreeEntry)
ensure_initialized()
otype = ccall((:git_tree_entry_type, :libgit2), Cint, (Ptr{Cvoid},), te.ptr)
return objtype(Consts.OBJECT(otype))
end
"""
entryid(te::GitTreeEntry)
Return the [`GitHash`](@ref) of the object to which `te` refers.
"""
function entryid(te::GitTreeEntry)
ensure_initialized()
GC.@preserve te begin
oid_ptr = ccall((:git_tree_entry_id, :libgit2), Ptr{UInt8}, (Ptr{Cvoid},), te.ptr)
oid = GitHash(oid_ptr)
end
return oid
end
function count(tree::GitTree)
ensure_initialized()
return ccall((:git_tree_entrycount, :libgit2), Csize_t, (Ptr{Cvoid},), tree.ptr)
end
function Base.getindex(tree::GitTree, i::Integer)
if i < 1 || i > count(tree)
throw(BoundsError(tree, i))
end
ensure_initialized()
te_ptr = ccall((:git_tree_entry_byindex, :libgit2),
Ptr{Cvoid},
(Ptr{Cvoid}, Csize_t), tree.ptr, i-1)
return GitTreeEntry(tree, te_ptr, false)
end
"""
(::Type{T})(te::GitTreeEntry) where T<:GitObject
Get the git object to which `te` refers and return it as its actual type (the type
[`entrytype`](@ref) would show), for instance a `GitBlob` or `GitTag`.
# Examples
```julia
tree = LibGit2.GitTree(repo, "HEAD^{tree}")
tree_entry = tree[1]
blob = LibGit2.GitBlob(tree_entry)
```
"""
GitObject(e::GitTreeEntry)
function (::Type{T})(te::GitTreeEntry) where T<:GitObject
ensure_initialized()
repo = repository(te)
obj_ptr_ptr = Ref{Ptr{Cvoid}}(C_NULL)
@check ccall((:git_tree_entry_to_object, :libgit2), Cint,
(Ptr{Ptr{Cvoid}}, Ptr{Cvoid}, Ptr{Cvoid}),
obj_ptr_ptr, repo, te)
return T(repo, obj_ptr_ptr[])
end
function Base.show(io::IO, te::GitTreeEntry)
println(io, "GitTreeEntry:")
println(io, "Entry name: ", filename(te))
println(io, "Entry type: ", entrytype(te))
println(io, "Entry OID: ", entryid(te))
end
function Base.show(io::IO, tree::GitTree)
println(io, "GitTree:")
println(io, "Owner: ", repository(tree))
println(io, "Number of entries: ", count(tree))
end
function _getindex(tree::GitTree, target::AbstractString)
if basename(target) == ""
# get rid of any trailing separator
target = dirname(target)
end
if isempty(target) || target == "/"
return tree
end
entry = Ref{Ptr{Cvoid}}(C_NULL)
err = ccall((:git_tree_entry_bypath, :libgit2), Cint, (Ptr{Ptr{Cvoid}}, Ptr{Cvoid}, Cstring), entry, tree, target)
err == Int(Error.ENOTFOUND) && return nothing
err < 0 && throw(Error.GitError(err))
entry = GitTreeEntry(tree, entry[], true #= N.B.: Most other lookups need false here =#)
return GitObject(entry)
end
"""
getindex(tree::GitTree, target::AbstractString) -> GitObject
Look up `target` path in the `tree`, returning a [`GitObject`](@ref) (a [`GitBlob`](@ref) in
the case of a file, or another [`GitTree`](@ref) if looking up a directory).
# Examples
```julia
tree = LibGit2.GitTree(repo, "HEAD^{tree}")
readme = tree["README.md"]
subtree = tree["test"]
runtests = subtree["runtests.jl"]
```
"""
function Base.getindex(tree::GitTree, target::AbstractString)
e = _getindex(tree, target)
e === nothing && throw(KeyError(target))
return e
end
function Base.haskey(tree::GitTree, target::AbstractString)
return _getindex(tree, target) !== nothing
end