Updated 'checkout-deps' to check for 'pip'/'pip3' prior to installing 'AMBuild'

tools/checkout-deps.ps1

@@ -32,7 +32,7 @@ param(
         )
 )
 
-Function Checkout-Repo
+Function Get-Repository
 {
     param(
         [Parameter(Mandatory=$true)][string]$Name,
@@ -74,7 +74,7 @@ if (-not (Test-Path "sourcemod" -PathType Container))
     Exit 1
 }
 
-Checkout-Repo -Name "mmsource-1.10" -Branch "1.10-dev" -Repo "https://github.com/alliedmodders/metamod-source.git"
+Get-Repository -Name "mmsource-1.10" -Branch "1.10-dev" -Repo "https://github.com/alliedmodders/metamod-source.git"
 
 if (-not (Test-Path "hl2sdk-proxy-repo" -PathType Container))
 {
@@ -87,12 +87,49 @@ else
     Set-Location ..
 }
 
-$SDKS | % {
-    Checkout-Repo -Name "hl2sdk-$_" -Branch $_ -Repo "hl2sdk-proxy-repo" "https://github.com/alliedmodders/hl2sdk.git"
+$SDKS | ForEach-Object {
+    Get-Repository -Name "hl2sdk-$_" -Branch $_ -Repo "hl2sdk-proxy-repo" "https://github.com/alliedmodders/hl2sdk.git"
 }
 
-Checkout-Repo -Name "ambuild" -Branch "master" -Repo "https://github.com/alliedmodders/ambuild.git"
-Set-Location ambuild
-& python setup.py install
+# Find a suitable installation of Python
+$PYTHON_CMD = Get-Command 'python' -ErrorAction SilentlyContinue
+if ($NULL -eq $PYTHON_CMD)
+{
+    $PYTHON_CMD = Get-Command 'python3' -ErrorAction SilentlyContinue
+    if ($NULL -eq $PYTHON_CMD)
+    {
+        $PYTHON_CMD = Get-Command 'py' -ErrorAction SilentlyContinue
+        if ($NULL -eq $PYTHON_CMD)
+        {
+            Write-Error 'No suitable installation of Python detected'
+            Exit 1
+        }
+    }
+}
 
-Set-Location ..
+$PYTHON_CMD = $PYTHON_CMD.Source # Convert the result into a string path.
+
+& $PYTHON_CMD -c 'import ambuild2' 2>&1 1>$NULL
+if ($LastExitCode -eq 1)
+{
+    Write-Host -ForegroundColor Red "AMBuild is required to build SourceMod"
+
+    # Ensure PIP is installed, otherwise, install it.
+    & $PYTHON_CMD -m pip --version 2>&1 1>$NULL # We use PIP's '--version' as it's the least verbose.
+    if ($LastExitCode -eq 1) {
+        Write-Host -ForegroundColor Red 'The detected Python installation does not have PIP'
+        Write-Host 'Installing the latest version of PIP available (VIA "get-pip.py")'
+
+        $GET_PIP = Join-Path $(Resolve-Path './') 'get-pip.py'
+        Invoke-WebRequest -Uri "https://bootstrap.pypa.io/get-pip.py" -OutFile $GET_PIP
+
+        & $PYTHON_CMD $GET_PIP
+        if ($LastExitCode -eq 1) {
+            Write-Error 'Installation of PIP has failed'
+            Exit 1
+        }
+    }
+
+    Get-Repository -Name "ambuild" -Branch "master" -Repo "https://github.com/alliedmodders/ambuild.git"
+    & $PYTHON_CMD -m pip install ./ambuild
+}

tools/checkout-deps.sh

@@ -110,11 +110,11 @@ checkout
 
 if [ -z ${sdks+x} ]; then
   sdks=( csgo hl2dm nucleardawn l4d2 dods l4d css tf2 insurgency sdk2013 doi )
-  
+
   if [ $ismac -eq 0 ]; then
     # Add these SDKs for Windows or Linux
     sdks+=( orangebox blade episode1 bms )
-  
+
     # Add more SDKs for Windows only
     if [ $iswin -eq 1 ]; then
       sdks+=( darkm swarm bgt eye contagion )
@@ -140,20 +140,54 @@ do
   checkout
 done
 
-`python -c "import ambuild2"` || `python3 -c "import ambuild2"`
+python_cmd=`command -v python`
+if [ -z "$python_cmd" ]; then
+  python_cmd=`command -v python3`
+
+  if [ -z "$python_cmd" ]; then
+    echo "No suitable installation of Python detected"
+    exit 1
+  fi
+fi
+
+`$python_cmd -c "import ambuild2"` 2>&1 1>/dev/null
 if [ $? -eq 1 ]; then
+  echo "AMBuild is required to build SourceMod"
+
+  `$python_cmd -m pip --version` 2>&1 1>/dev/null
+  if [ $? -eq 1 ]; then
+    echo "The detected Python installation does not have PIP"
+    echo "Installing the latest version of PIP available (VIA \"get-pip.py\")"
+
+    get_pip="./get-pip.py"
+    get_pip_url="https://bootstrap.pypa.io/get-pip.py"
+
+    if [ `command -v wget` ]; then
+      wget $get_pip_url -O $get_pip
+    elif [ `command -v curl` ]; then
+      curl -o $get_pip $get_pip_url
+    else
+      echo "Failed to locate wget or curl. Install one of these programs to download 'get-pip.py'."
+      exit 1
+    fi
+
+    $python_cmd $get_pip
+    if [ $? -eq 1 ]; then
+      echo "Installation of PIP has failed"
+      exit 1
+    fi
+  fi
+
   repo="https://github.com/alliedmodders/ambuild"
   origin=
   branch=master
   name=ambuild
   checkout
 
-  cd ambuild
   if [ $iswin -eq 1 ] || [ $ismac -eq 1 ]; then
-    python setup.py install
+    $python_cmd -m pip install ./ambuild
   else
-    python setup.py build
     echo "Installing AMBuild at the user level. Location can be: ~/.local/bin"
-    python setup.py install --user
+    $python_cmd -m pip install --user ./ambuild
   fi
 fi