install: add checks

install.sh

@@ -4,42 +4,61 @@
 #
 set -eo pipefail
 
-username="tractordev"
-repo="wanix"
-binpath="${TARGET:-/usr/local/bin}"
-
-repoURL="https://github.com/${username}/${repo}"
-releaseURL="$(curl -sI ${repoURL}/releases/latest | grep 'location:' | awk '{print $2}')"
-version="$(basename $releaseURL | cut -c 2- | tr -d '\r')"
-
-os=""
-arch=""
-
-# Detect operating system
-if [[ "$OSTYPE" == "linux-gnu"* ]]; then
-  os="linux"
-elif [[ "$OSTYPE" == "darwin"* ]]; then
-  os="darwin"
-elif [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" ]]; then
-  # WSL uses msys or cygwin as OSTYPE
-  os="windows"
-else
-  echo "Unsupported operating system"
-  exit 1
-fi
-
-# Detect architecture
-if [[ "$(uname -m)" == "x86_64" ]]; then
-  arch="amd64"
-elif [[ "$(uname -m)" == "arm64" ]]; then
-  arch="arm64"
-else
-  echo "Unsupported architecture"
-  exit 1
-fi
-
-filename="${repo}_${version}_${os}_${arch}.zip"
-
-curl -sSLO "${repoURL}/releases/download/v${version}/${filename}"
-unzip $filename wanix -d $binpath
-rm $filename
+required_tools=("curl" "grep" "awk" "unzip")
+for tool in "${required_tools[@]}"; do
+  if ! command -v $tool &>/dev/null; then
+    echo "Error: $tool is required but not installed. Please install it first."
+    exit 1
+  fi
+done
+
+main() {
+  local username="tractordev"
+  local repo="wanix"
+  local binpath="${TARGET:-/usr/local/bin}"
+
+  # Check if write permission is available
+  if [[ ! -w "$binpath" ]]; then
+    echo "Error: No write permission for $binpath. Try running with sudo or choose a different TARGET."
+    exit 1
+  fi
+
+  local repoURL="https://github.com/${username}/${repo}"
+  local releaseURL="$(curl -sI ${repoURL}/releases/latest | grep 'location:' | awk '{print $2}')"
+  local version="$(basename $releaseURL | cut -c 2- | tr -d '\r')"
+
+  local os=""
+  local arch=""
+
+  # Detect operating system
+  if [[ "$OSTYPE" == "linux-gnu"* ]]; then
+    os="linux"
+  elif [[ "$OSTYPE" == "darwin"* ]]; then
+    os="darwin"
+  elif [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" ]]; then
+    # WSL uses msys or cygwin as OSTYPE
+    os="windows"
+  else
+    echo "Error: Unsupported operating system"
+    exit 1
+  fi
+
+  # Detect architecture
+  if [[ "$(uname -m)" == "x86_64" ]]; then
+    arch="amd64"
+  elif [[ "$(uname -m)" == "arm64" ]]; then
+    arch="arm64"
+  else
+    echo "Error: Unsupported architecture"
+    exit 1
+  fi
+
+  local filename="${repo}_${version}_${os}_${arch}.zip"
+  curl -sSLO "${repoURL}/releases/download/v${version}/${filename}"
+  unzip $filename wanix -d $binpath
+  rm "./$filename"
+
+  echo "Executable wanix ${version} installed to ${binpath}"
+}
+
+main "$@"