blowfish theme update. update go installer script post

Author: netops2devops

content/posts/go-installer.md

@@ -6,20 +6,39 @@ author: "Kapil Agrawal"
 comments: false
 ---
 
-I wrote a super simple shell script to install Go on a linux system to get a consistent Go environment for all users. I often use this script when I need Go installed on a remote development VM specialy when working on projects that require x86-64 architecture.
+I asked our LLM overlords to generate a simple shell script to install Go on a linux system so as to get a consistent development environment regardless of the underlying OS architecture (amd64 vs. arm) I am working on. By default it installs the latest release. To install a specific go version pass it as a cli argument when running the script.
 
 ```sh
 #!/bin/bash
 
-set -e           # Exit on error
-set -o pipefail  # Catch errors in pipelines
+set -e
+set -o pipefail
 
-VERSION=${1:-"1.24.1"}
-ARCH="linux-amd64"
+# Detect architecture
+ARCH_RAW=$(uname -m)
+case "$ARCH_RAW" in
+    x86_64) GO_ARCH="amd64" ;;
+    aarch64 | arm64) GO_ARCH="arm64" ;;
+    *)
+        echo "❌ Unsupported architecture: $ARCH_RAW" >&2
+        exit 1
+        ;;
+esac
+
+# Get version (default: latest)
+if [ -n "$1" ]; then
+    VERSION="$1"
+else
+    echo "📦 Fetching latest Go version..."
+    VERSION=$(curl -s https://go.dev/VERSION?m=text | head -n 1 | sed 's/go//')
+fi
+
+ARCH="linux-${GO_ARCH}"
 GO_TARBALL="go${VERSION}.${ARCH}.tar.gz"
 GO_URL="https://go.dev/dl/${GO_TARBALL}"
 INSTALL_DIR="/usr/local/go"
 
+# Root check
 if [ "$(id -u)" -ne 0 ]; then
   echo "This script must be run as root or with sudo." >&2
   exit 1
@@ -34,32 +53,26 @@ fi
 # Remove old Go binaries
 if command -v go &>/dev/null; then
   echo "Removing existing Go binaries..."
-  rm -f $(which go) $(which gofmt)
+  rm -f "$(command -v go)" "$(command -v gofmt)"
 fi
 
 # Download and install Go
 if wget --quiet --spider "$GO_URL"; then
-  echo "Downloading Go $VERSION..."
+  echo "⬇️  Downloading Go $VERSION for $GO_ARCH..."
   wget -q "$GO_URL" -O "$GO_TARBALL"
-  echo "Extracting Go..."
+  echo "📦 Extracting Go..."
   tar -C /usr/local -xvf "$GO_TARBALL"
   rm "$GO_TARBALL"
 else
-  echo "Error: Go version $VERSION not found at $GO_URL" >&2
+  echo "❌ Error: Go version $VERSION not found at $GO_URL" >&2
   exit 1
 fi
 
-# Ensure symbolic links are created
+# Create symlinks
 ln -sf /usr/local/go/bin/go /usr/local/bin/go
 ln -sf /usr/local/go/bin/gofmt /usr/local/bin/gofmt
 
-# Configure GOPATH
-GOPATH="/opt/go"
-mkdir -p "$GOPATH/bin" "$GOPATH/pkg"
-chown -R root:sudo "$GOPATH"
-chmod -R 0775 "$GOPATH"
-
-grep -q "^GOPATH=" /etc/environment || echo "GOPATH=$GOPATH" >> /etc/environment
-
-echo "Go $VERSION installed successfully!"
+echo "✅ Go $VERSION installed successfully for $GO_ARCH!"
+echo "👉 Note: GOPATH will default to \$(go env GOPATH) (usually ~/go)."
+echo "👉 Add /usr/local/go/bin to your PATH if not already set."
 ```