steps:
# FIXME: are these still needed?
# - bash: |
#     set -x
#     git submodule
#     export SUBMODULES_EXCLUDES=$(git submodule | grep -Eow 'src/[^ ]+' | sed 's/\(.*\)/--exclude=\1\/\.git/')
#     echo "##vso[task.setvariable variable=SUBMODULES_EXCLUDES;]$SUBMODULES_EXCLUDES"

# FIXME: needs a comment to justify its existence
- script: |
    REM echo hack as drive D is too small
    IF NOT "%DISABLE_DISK_SPACE_HACK%"=="1" (
      mkdir c:\MORE_SPACE
      mklink /J build c:\MORE_SPACE
    )
  displayName: "Ensure build happens on C:/ instead of D:/"
  condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))

- script: |
    set MSYS_PATH=%CD%\citools\msys64
    choco install msys2 --params="/InstallDir:%MSYS_PATH% /NoPath" -y
    set PATH=%MSYS_PATH%\usr\bin;%PATH%
    pacman -S --noconfirm --needed base-devel ca-certificates make diffutils tar
    IF "%MINGW_URL%"=="" (
      IF "%MSYS_BITS%"=="32" pacman -S --noconfirm --needed mingw-w64-i686-toolchain mingw-w64-i686-cmake mingw-w64-i686-gcc mingw-w64-i686-python2
      IF "%MSYS_BITS%"=="64" pacman -S --noconfirm --needed mingw-w64-x86_64-toolchain mingw-w64-x86_64-cmake mingw-w64-x86_64-gcc mingw-w64-x86_64-python2
    )
    where rev
    rev --help
    where make

    echo ##vso[task.setvariable variable=MSYS_PATH]%MSYS_PATH%
    echo ##vso[task.prependpath]%MSYS_PATH%\usr\bin
  displayName: Install msys2
  condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))

# If we need to download a custom MinGW, do so here and set the path
# appropriately.
#
# Note that this *also* means that we're not using what is typically
# /mingw32/bin/python2.7.exe, which is a "correct" python interpreter where
# /usr/bin/python2.7.exe is not. To ensure we use the right interpreter we
# move `C:\Python27` ahead in PATH and then also make sure the `python2.7.exe`
# file exists in there (which it doesn't by default).
- script: |
    powershell -Command "iwr -outf %MINGW_ARCHIVE% %MINGW_URL%/%MINGW_ARCHIVE%"
    7z x -y %MINGW_ARCHIVE% > nul
    echo ##vso[task.prependpath]%CD%\%MINGW_DIR%\bin
  condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'), ne(variables['MINGW_URL'],''))
  displayName: Download custom MinGW

# Here we do a pretty heinous thing which is to mangle the MinGW installation
# we just had above. Currently, as of this writing, we're using MinGW-w64
# builds of gcc, and that's currently at 6.3.0. We use 6.3.0 as it appears to
# be the first version which contains a fix for #40546, builds randomly
# failing during LLVM due to ar.exe/ranlib.exe failures.
#
# Unfortunately, though, 6.3.0 *also* is the first version of MinGW-w64 builds
# to contain a regression in gdb (#40184). As a result if we were to use the
# gdb provided (7.11.1) then we would fail all debuginfo tests.
#
# In order to fix spurious failures (pretty high priority) we use 6.3.0. To
# avoid disabling gdb tests we download an *old* version of gdb, specifically
# that found inside the 6.2.0 distribution. We then overwrite the 6.3.0 gdb
# with the 6.2.0 gdb to get tests passing.
#
# Note that we don't literally overwrite the gdb.exe binary because it appears
# to just use gdborig.exe, so that's the binary we deal with instead.
- script: |
    echo ON
    powershell -Command "iwr -outf 2017-04-20-%MSYS_BITS%bit-gdborig.exe %MINGW_URL%/2017-04-20-%MSYS_BITS%bit-gdborig.exe"
    mv 2017-04-20-%MSYS_BITS%bit-gdborig.exe %MINGW_DIR%\bin\gdborig.exe
  condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'), ne(variables['MINGW_URL'],''))
  displayName: Override with 6.3.0 gdb with 6.2.0 gdb

# Otherwise pull in the MinGW installed on appveyor
- script: |
    echo ##vso[task.prependpath]%MSYS_PATH%\mingw%MSYS_BITS%\bin
  condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'), eq(variables['MINGW_URL'],''))
  displayName: Add MinGW to path

- script: |
    copy C:\Python27amd64\python.exe C:\Python27amd64\python2.7.exe
    echo ##vso[task.prependpath]C:\Python27amd64
  displayName: Prefer the "native" Python as LLVM has trouble building with MSYS sometimes
  condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))

# Note that this is originally from the github releases patch of Ninja
- script: |
    md ninja
    powershell -Command "iwr -outf 2017-03-15-ninja-win.zip https://s3-us-west-1.amazonaws.com/rust-lang-ci2/rust-ci-mirror/2017-03-15-ninja-win.zip"
    7z x -oninja 2017-03-15-ninja-win.zip
    del 2017-03-15-ninja-win.zip
    set RUST_CONFIGURE_ARGS=%RUST_CONFIGURE_ARGS% --enable-ninja
    echo ##vso[task.setvariable variable=RUST_CONFIGURE_ARGS]%RUST_CONFIGURE_ARGS%
    echo ##vso[task.prependpath]%CD%\ninja
  displayName: Download and install ninja
  condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))