Try to install Julia within app

gui/app.py

@@ -38,21 +38,24 @@ def greet(
             "Please upload a CSV file!",
         )
     niterations = int(niterations)
+
+    # Install Julia:
+    os.system(
+        """if [ ! -d "~/julia" ]; then
+        wget https://julialang-s3.julialang.org/bin/linux/x64/1.7/julia-1.7.3-linux-x86_64.tar.gz
+        tar zxvf julia-1.7.3-linux-x86_64.tar.gz
+        mkdir ~/julia
+        mv julia-1.7.3-linux/* ~/julia/
+    fi""")
+    os.environ["PATH"] += ":~/julia/bin/"
     # Need to install PySR in separate python instance:
     os.system(
-        """if [ ! -d "$HOME/.julia/environments/pysr-0.9.3" ]
-    then
+        """if [ ! -d "$HOME/.julia/environments/pysr-0.9.3" ]; then
+        export PATH="$PATH:$HOME/julia/bin/"
         python -c 'import pysr; pysr.install()'
     fi"""
     )
 
-    # Check if /usr/bin/julia exists:
-    if not os.path.isfile("/usr/bin/julia"):
-        return (
-            empty_df,
-            "Julia is not installed! (assuming '/usr/bin/julia')",
-        )
-
     import pysr
     try:
         from julia.api import JuliaInfo
@@ -65,8 +68,6 @@ def greet(
             empty_df,
             error_message,
         )
-
-
     from pysr import PySRRegressor
 
     df = pd.read_csv(file_obj.name)

gui/requirements.txt

@@ -1,3 +0,0 @@
-pysr==0.9.3
-numpy
-pandas