added install_arc.sh

Author: alongd

devtools/install_all.sh

@@ -13,6 +13,7 @@ conda config --set solver libmamba
 echo ">>> Beginning full ARC external repo installation..."
 pushd . >/dev/null
 
+bash devtools/install_arc.sh
 bash devtools/install_rmg.sh
 bash devtools/install_molecule.sh
 bash devtools/install_gcn_cpu.sh

devtools/install_arc.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -eo pipefail
+
+ENV_NAME="arc_env"
+ENV_FILE="environment.yml"
+
+# Initialize conda for bash
+source "$(conda info --base)/etc/profile.d/conda.sh"
+
+# Check if the environment exists
+if conda env list | grep -qw "$ENV_NAME"; then
+    echo "✔️ Environment '$ENV_NAME' exists. Updating from $ENV_FILE..."
+    conda env update -n "$ENV_NAME" -f "$ENV_FILE"
+else
+    echo "📦 Creating environment '$ENV_NAME' from $ENV_FILE..."
+    conda env create -n "$ENV_NAME" -f "$ENV_FILE"
+fi
+
+echo "✅ ARC environment setup complete."