Add: julia-0.6.2

Former-commit-id: ccc667cf67d569f3fb3df39aa57c2134755a7551

julia-0.6.2/share/julia/base/libgit2/walker.jl

@@ -0,0 +1,102 @@
+# This file is a part of Julia. License is MIT: https://julialang.org/license
+
+function GitRevWalker(repo::GitRepo)
+    w_ptr = Ref{Ptr{Void}}(C_NULL)
+    @check ccall((:git_revwalk_new, :libgit2), Cint,
+                  (Ptr{Ptr{Void}}, Ptr{Void}), w_ptr, repo.ptr)
+    return GitRevWalker(repo, w_ptr[])
+end
+
+function Base.start(w::GitRevWalker)
+    id_ptr = Ref(GitHash())
+    err = ccall((:git_revwalk_next, :libgit2), Cint,
+                (Ptr{GitHash}, Ptr{Void}), id_ptr, w.ptr)
+    err != Int(Error.GIT_OK) && return (nothing, true)
+    return (id_ptr[], false)
+end
+
+Base.done(w::GitRevWalker, state) = Bool(state[2])
+
+function Base.next(w::GitRevWalker, state)
+    id_ptr = Ref(GitHash())
+    err = ccall((:git_revwalk_next, :libgit2), Cint,
+                (Ptr{GitHash}, Ptr{Void}), id_ptr, w.ptr)
+    err != Int(Error.GIT_OK) && return (state[1], (nothing, true))
+    return (state[1], (id_ptr[], false))
+end
+
+Base.iteratorsize(::Type{GitRevWalker}) = Base.SizeUnknown()
+
+function push_head!(w::GitRevWalker)
+    @check ccall((:git_revwalk_push_head, :libgit2), Cint, (Ptr{Void},), w.ptr)
+    return w
+end
+
+function Base.push!(w::GitRevWalker, cid::GitHash)
+    @check ccall((:git_revwalk_push, :libgit2), Cint, (Ptr{Void}, Ptr{GitHash}), w.ptr, Ref(cid))
+    return w
+end
+
+function Base.push!(w::GitRevWalker, range::AbstractString)
+    @check ccall((:git_revwalk_push_range, :libgit2), Cint, (Ptr{Void}, Ptr{UInt8}), w.ptr, range)
+    return w
+end
+
+function Base.sort!(w::GitRevWalker; by::Cint = Consts.SORT_NONE, rev::Bool=false)
+    rev && (by |= Consts.SORT_REVERSE)
+    ccall((:git_revwalk_sorting, :libgit2), Void, (Ptr{Void}, Cint), w.ptr, by)
+    return w
+end
+
+repository(w::GitRevWalker) = w.owner
+
+function Base.map(f::Function, walker::GitRevWalker;
+                  oid::GitHash=GitHash(),
+                  range::AbstractString="",
+                  by::Cint = Consts.SORT_NONE,
+                  rev::Bool=false,
+                  count::Int=0)
+    res = []
+    sort!(walker, by=by, rev=rev)
+    if !iszero(oid)
+        push!(walker, oid)
+    elseif !isempty(range)
+        push!(walker, range)
+    else
+        push_head!(walker)
+    end
+    s = start(walker)
+
+    c = 0
+    repo = repository(walker)
+    while !done(walker, s)
+        val = f(s[1], repo)
+        push!(res, val)
+        val, s = next(walker, s)
+        c +=1
+        count == c && break
+    end
+    return res
+end
+
+function Base.count(f::Function, walker::GitRevWalker;
+                  oid::GitHash=GitHash(),
+                  by::Cint = Consts.SORT_NONE,
+                  rev::Bool=false)
+    c = 0
+    sort!(walker, by=by, rev=rev)
+    if !iszero(oid)
+        push!(walker, oid)
+    else
+        push_head!(walker)
+    end
+    s = start(walker)
+
+    repo = repository(walker)
+    while !done(walker, s)
+        val = f(s[1], repo)
+        _, s = next(walker, s)
+        c += (val == true)
+    end
+    return c
+end