From 57333145a7a7ccc3efce1f801d5287086e75ad4d Mon Sep 17 00:00:00 2001
From: Alberto <albertocasasortiz@gmail.com>
Date: Wed, 29 Jun 2022 20:37:23 +0200
Subject: [PATCH] Update build.sh

If you install swig using the package manager, it is not detected in Ubuntu since it is looking for it in ~/swig/
---
 opensim/build.sh | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/opensim/build.sh b/opensim/build.sh
index ebd4c9f..4cfa76f 100644
--- a/opensim/build.sh
+++ b/opensim/build.sh
@@ -20,11 +20,21 @@ cd ..
 
 # cp -r $PREFIX/simbody/libexec/simbody/* $PREFIX/bin/
 
+
 if [ "$(uname)" == "Darwin" ]; then
    SWIG_DIR_SPEC=/usr/local/Cellar/swig/4.0.2
+   SWIG_EXE_SPEC=~/swig/bin/swig
 else
-   SWIG_DIR_SPEC=~/swig/share/swig 
+   # Check if swig has been installed using package manager.
+   if [ -d "/usr/share/swig4.0" ]; then
+      SWIG_DIR_SPEC=/usr/share/swig4.0
+      SWIG_EXE_SPEC=/usr/bin/swig
+   else
+      SWIG_DIR_SPEC=~/swig/share/swig 
+      SWIG_EXE_SPEC=~/swig/bin/swig
+   fi
 fi
+
 # TODO: Tests are missing!
 mkdir opensim_build
 cd opensim_build
@@ -36,7 +46,7 @@ cmake ../ \
       -DCMAKE_OSX_SYSROOT=${CONDA_BUILD_SYSROOT} \
       -DCMAKE_OSX_DEPLOYMENT_TARGET=10.15 \
       -DSWIG_DIR=${SWIG_DIR_SPEC} \
-      -DSWIG_EXECUTABLE=~/swig/bin/swig \
+      -DSWIG_EXECUTABLE=${SWIG_EXE_SPEC} \
       -DBUILD_PYTHON_WRAPPING=ON \
       -DOPENSIM_DISABLE_LOG_FILE=ON \
       -DOPENSIM_C3D_PARSER=ezc3d \