From 5416132b9221f8dad66dffc67bbcf748c6cb2d07 Mon Sep 17 00:00:00 2001
From: Lucian Carata <lcr@bitrunes.org>
Date: Thu, 6 Jul 2023 10:47:20 +0100
Subject: [PATCH] Fix build-wheels.sh error when copying to output path

Fixes hack/build-wheels.sh failing when trying to copy the dist
over itself (source and output path the same). This occured
when doing `make build` for example, where build-wheels.sh is
called with an output path of ./dist and tries to copy the
mlserver wheels.
---
 hack/build-wheels.sh | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/hack/build-wheels.sh b/hack/build-wheels.sh
index 786a264fe..045d4abfb 100755
--- a/hack/build-wheels.sh
+++ b/hack/build-wheels.sh
@@ -15,24 +15,29 @@ fi
 _buildWheel() {
   local _srcPath=$1
   local _outputPath=$2
-  local _currentDir=$PWD
 
   # Poetry doesn't let us send the output to a separate folder so we'll `cd`
   # into the folder and them move the wheels out
   # https://github.com/python-poetry/poetry/issues/3586
   pushd $_srcPath
   poetry build
-  cp ./dist/* $_outputPath
+  # Only copy files if destination is different from source
+  local _currentDistPath=$PWD/dist
+  if ! [[ "$_currentDistPath" = "$_outputPath" ]]; then
+    cp $_currentDistPath/* $_outputPath
+  fi
   popd
 }
 
 _main() {
   # Convert any path into an absolute path
   local _outputPath=$1
+  mkdir -p $_outputPath
   if ! [[ "$_outputPath" = /* ]]; then
-    _outputPath="$PWD/$_outputPath"
+    pushd $_outputPath
+    _outputPath="$PWD"
+    popd
   fi
-  mkdir -p $_outputPath
 
   # Build MLServer
   echo "---> Building MLServer wheel"