[PATCH 2/2] cirrus: Enable doc build on msys2/mingw

[Yonggang Luo <luoyonggang@gmail.com>]

Currently rST depends on old version sphinx-2.x.
Install it by downloading it.

Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
---
 .cirrus.yml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/.cirrus.yml b/.cirrus.yml
index 77cfd99afe..b1725bd0c1 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -73,6 +73,7 @@ windows_msys2_task:
         bitsadmin /transfer msys_download /dynamic /download /priority FOREGROUND https://github.com/msys2/msys2-installer/releases/download/2020-09-03/msys2-base-x86_64-20200903.sfx.exe C:\tools\base.exe
         Write-Output "Download time taken: $((Get-Date).Subtract($start_time).Seconds) second(s)"
         C:\tools\base.exe -y
+        del C:\tools\base.exe
         ((Get-Content -path C:\tools\msys64\etc\\post-install\\07-pacman-key.post -Raw) -replace '--refresh-keys', '--version') | Set-Content -Path C:\tools\msys64\etc\\post-install\\07-pacman-key.post
         C:\tools\msys64\usr\bin\bash.exe -lc "sed -i 's/^CheckSpace/#CheckSpace/g' /etc/pacman.conf"
         C:\tools\msys64\usr\bin\bash.exe -lc "export"
@@ -112,6 +113,13 @@ windows_msys2_task:
           mingw-w64-x86_64-gnutls \
           mingw-w64-x86_64-libnfs \
           "
+        bitsadmin /transfer msys_download /dynamic /download /priority FOREGROUND `
+          https://mirrors.tuna.tsinghua.edu.cn/msys2/mingw/x86_64/mingw-w64-x86_64-python-sphinx-2.3.1-1-any.pkg.tar.xz `
+          C:\tools\mingw-w64-x86_64-python-sphinx-2.3.1-1-any.pkg.tar.xz
+        C:\tools\msys64\usr\bin\bash.exe -lc "pacman --noconfirm -U \
+          /c/tools/mingw-w64-x86_64-python-sphinx-2.3.1-1-any.pkg.tar.xz
+          "
+        del C:\tools\mingw-w64-x86_64-python-sphinx-2.3.1-1-any.pkg.tar.xz
         C:\tools\msys64\usr\bin\bash.exe -lc "rm -rf /var/cache/pacman/pkg/*"
         cd C:\tools\msys64
         echo "Start archive"
-- 
2.28.0.windows.1