Add robust command availability checks to all shell scripts

- Add check for @defaultPackageName@-devenv in activateDevenv.sh
- Add check for uv command in initPython.sh
- Add check for git command in initProject.sh (with graceful degradation)
- Add checks for wget, sed, nix in updateDeps.sh
- Provide clear error messages when commands are not available
- Prevent scripts from failing with cryptic errors when tools are missing

Co-authored-by: dwinkler1 <22460147+dwinkler1@users.noreply.github.com>

templates/rde/scripts/activateDevenv.sh

@@ -2,6 +2,11 @@
 set -euo pipefail
 if [[ -f "devenv.nix" ]]; then
   echo "🚀 Activating devenv environment..."
+  if ! command -v @defaultPackageName@-devenv &> /dev/null; then
+    echo "❌ Command '@defaultPackageName@-devenv' not found."
+    echo "Ensure devenv is properly configured in your environment."
+    exit 1
+  fi
   exec @defaultPackageName@-devenv shell
 else
   echo "❌ No devenv.nix file found in the current directory."

templates/rde/scripts/initProject.sh

@@ -43,25 +43,32 @@ fi
 
 # Initialize git
 if [[ ! -d ".git" ]]; then
-  git init
-  echo "✓ Initialized Git repository"
+  if ! command -v git &> /dev/null; then
+    echo "⚠️  Warning: 'git' command not found. Skipping git initialization."
+    echo "Install git to enable version control."
+  else
+    git init
+    echo "✓ Initialized Git repository"
+  fi
 fi
 
 # Check if files exist and are not already staged/tracked before adding
-if [[ -f "flake.nix" ]] && ! git diff --cached --name-only 2>/dev/null | grep -q "flake.nix" &&
-   ! git ls-files --error-unmatch flake.nix >/dev/null 2>&1; then
-  echo "✓ Adding flake.nix to Git repository"
-  git add flake.nix
-elif [[ -f "flake.nix" ]]; then
-  echo "✓ flake.nix already tracked/staged in Git"
-fi
+if command -v git &> /dev/null && [[ -d ".git" ]]; then
+  if [[ -f "flake.nix" ]] && ! git diff --cached --name-only 2>/dev/null | grep -q "flake.nix" &&
+     ! git ls-files --error-unmatch flake.nix >/dev/null 2>&1; then
+    echo "✓ Adding flake.nix to Git repository"
+    git add flake.nix
+  elif [[ -f "flake.nix" ]]; then
+    echo "✓ flake.nix already tracked/staged in Git"
+  fi
 
-if [[ -f "flake.lock" ]] && ! git diff --cached --name-only 2>/dev/null | grep -q "flake.lock" &&
-   ! git ls-files --error-unmatch flake.lock >/dev/null 2>&1; then
-  echo "✓ Adding flake.lock to Git repository"
-  git add flake.lock
-elif [[ -f "flake.lock" ]]; then
-  echo "✓ flake.lock already tracked/staged in Git"
+  if [[ -f "flake.lock" ]] && ! git diff --cached --name-only 2>/dev/null | grep -q "flake.lock" &&
+     ! git ls-files --error-unmatch flake.lock >/dev/null 2>&1; then
+    echo "✓ Adding flake.lock to Git repository"
+    git add flake.lock
+  elif [[ -f "flake.lock" ]]; then
+    echo "✓ flake.lock already tracked/staged in Git"
+  fi
 fi
 # Create .gitignore
 if [[ ! -f ".gitignore" ]]; then

templates/rde/scripts/initPython.sh

@@ -1,5 +1,14 @@
 #!/usr/bin/env bash
 set -euo pipefail
+
+# Check if uv command is available
+if ! command -v uv &> /dev/null; then
+  echo "❌ Command 'uv' not found."
+  echo "UV is required for Python project management."
+  echo "Ensure UV is properly installed in your environment."
+  exit 1
+fi
+
 if [[ ! -f "pyproject.toml" ]]; then
   echo "🐍 Initializing UV project..."
   uv init

templates/rde/scripts/updateDeps.sh

@@ -3,10 +3,29 @@ set -euo pipefail
 
 echo "🔄 Updating project dependencies..."
 
+# Check for required commands
+if ! command -v wget &> /dev/null; then
+  echo "❌ Error: 'wget' command not found."
+  echo "Please install wget to fetch R version information."
+  exit 1
+fi
+
+if ! command -v sed &> /dev/null; then
+  echo "❌ Error: 'sed' command not found."
+  echo "Please install sed to update flake.nix."
+  exit 1
+fi
+
+if ! command -v nix &> /dev/null; then
+  echo "❌ Error: 'nix' command not found."
+  echo "Please install Nix to update flake inputs."
+  exit 1
+fi
+
 # Ensure we're in the repository root
 if [[ ! -f "flake.nix" ]]; then
   # Try to find git root
-  if git rev-parse --show-toplevel >/dev/null 2>&1; then
+  if command -v git &> /dev/null && git rev-parse --show-toplevel >/dev/null 2>&1; then
     cd "$(git rev-parse --show-toplevel)"
     if [[ ! -f "flake.nix" ]]; then
       echo "❌ Error: flake.nix not found in repository root"