From 264a35eb85d6cdc974dff0d5700e544528bcfee6 Mon Sep 17 00:00:00 2001
From: Kristoffer Carlsson <kcarlsson89@gmail.com>
Date: Tue, 21 Nov 2017 11:44:29 +0100
Subject: [PATCH] unde beautiful hack and reimplement unix2datetime in LibGit2

---
 base/libgit2/signature.jl | 24 ++++++++++++++++++------
 stdlib/Dates/src/Dates.jl |  2 --
 2 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/base/libgit2/signature.jl b/base/libgit2/signature.jl
index f7cc75213d3218..3804d81a23bd31 100644
--- a/base/libgit2/signature.jl
+++ b/base/libgit2/signature.jl
@@ -35,16 +35,28 @@ function Base.convert(::Type{GitSignature}, sig::Signature)
     return GitSignature(sig_ptr_ptr[])
 end
 
-# Work around needing to access Dates from Base,
-# even though Dates is in the stdlib.
-# This Ref is filled with the needed function
-# when Dates is loaed
-const unix2datetime = Ref{Any}()
+function yearmonthday(days)
+    z = days + 306; h = 100z - 25; a = fld(h, 3652425); b = a - fld(a, 4)
+    y = fld(100b + h, 36525); c = b + z - 365y - fld(y, 4); m = div(5c + 456, 153)
+    d = c - div(153m - 457, 5); return m > 12 ? (y + 1, m - 12, d) : (y, m, d)
+end
+lpad0(x) = lpad(x, 2, '0')
+
+function unix2date(t)
+   UNIXEPOCH = 62135683200000
+   rata = UNIXEPOCH + round(Int64, Int64(1000) * t)
+   year, month, day = yearmonthday(fld(rata, 86400000))
+   secs = t % (24 * 60 * 60)
+   mins = div(secs, 60)
+   m, d = lpad0(month), lpad0(day)
+   h, mi, s = lpad0.(round.(Int, (div(mins, 60), mins % 60, secs % 60)))
+   return "$year-$m-$d $h:$mi:$s"
+end
 
 function Base.show(io::IO, sig::Signature)
     print(io, "Name: ", sig.name, ", ")
     print(io, "Email: ", sig.email, ", ")
-    print(io, "Time: ", unix2datetime[](sig.time + 60*sig.time_offset))
+    print(io, "Time: ", unix2date(sig.time + 60*sig.time_offset))
     @printf(io, "%+03i:%02i", divrem(sig.time_offset, 60)...)
 end
 
diff --git a/stdlib/Dates/src/Dates.jl b/stdlib/Dates/src/Dates.jl
index f353e5fd4e3371..6001e4d60d28bd 100644
--- a/stdlib/Dates/src/Dates.jl
+++ b/stdlib/Dates/src/Dates.jl
@@ -50,8 +50,6 @@ include("io.jl")
 include("parse.jl")
 include("deprecated.jl")
 
-Base.LibGit2.unix2datetime[] = unix2datetime
-
 export Period, DatePeriod, TimePeriod,
        Year, Month, Week, Day, Hour, Minute, Second, Millisecond,
        Microsecond, Nanosecond,