Make setup script more agnostic.

Author: brixen

certifiable-build/scripts/setup.sh

@@ -3,33 +3,32 @@ set -eu
 
 OS="$(uname -s)"
 
-case "$OS" in
-  Linux)
-    ;;
-  Darwin)
-    ;;
-  *)
-    echo "Unsupported OS: $OS"
-    exit 1
-    ;;
-esac
-
 if command -v brew >/dev/null 2>&1; then
   echo "Homebrew already installed."
 else
-  echo "Installing Homebrew..."
-
   NONINTERACTIVE=1 /bin/bash -c \
     "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
-fi
 
-if ! command -v brew >/dev/null 2>&1; then
-  if [ -x /home/linuxbrew/.linuxbrew/bin/brew ]; then
-    eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
-  else
-    echo "brew installed but not found on PATH"
-    exit 1
-  fi
+  case "$OS" in
+    Linux)
+      test -d ~/.linuxbrew && eval "$(~/.linuxbrew/bin/brew shellenv)"
+      test -d /home/linuxbrew/.linuxbrew && eval "$(/home/linuxbrew/.linuxbrew/bin/brew shellenv)"
+      echo "eval \"\$($(brew --prefix)/bin/brew shellenv)\"" >> ~/.bashrc
+      ;;
+    Darwin)
+      if [ -x /opt/homebrew/bin/brew ]; then
+        eval "$(/opt/homebrew/bin/brew shellenv)"
+        return 0
+      elif [ -x /usr/local/bin/brew ]; then
+        eval "$(/usr/local/bin/brew shellenv)"
+        return 0
+      fi
+      ;;
+    *)
+      echo "Unsupported OS: $OS"
+      exit 1
+      ;;
+  esac
 fi
 
 echo "Homebrew version:"
@@ -38,4 +37,6 @@ brew --version
 brew update
 brew install build2
 
+bdep --version
+
 echo "System dependencies installed successfully."