feat: improvements to the Makefile

- Check for go before building or installing.
- Ask for confirmation before replacing the new installation into the
given location.

Author: ErlanRG

Makefile

@@ -1,22 +1,42 @@
 # Variables
-BIN_DIR = $(HOME)/.local/bin
-TARGET = bluecpprint
-SRC = cmd/main.go
+BIN_DIR := $(HOME)/.local/bin
+TARGET := bluecpprint
+SRC := cmd/main.go
+
+# Check for Go at the start
+ifndef GO
+GO := $(shell command -v go 2>/dev/null)
+endif
+
+ifeq ($(GO),)
+$(error "Go is not installed or not in PATH. Please install Go to proceed.")
+endif
+
+.PHONY: all build run install uninstall clean check
 
 all: build
 
-build:
+check:
+	@command -v go >/dev/null 2>&1 || { echo >&2 "Go is not installed. Aborting."; exit 1; }
+
+build: check
 	@echo "Building..."
 	@go build -o $(TARGET) $(SRC) 2>&1
 
-run:
+run: check
 	@go run $(SRC)
 
 install: build
 	@echo "Installing..."
 	@mkdir -p $(BIN_DIR)
 	@if [ -f $(BIN_DIR)/$(TARGET) ]; then \
-	    echo "File $(BIN_DIR)/$(TARGET) already exists. Replacing..."; \
+	    echo "File $(BIN_DIR)/$(TARGET) already exists."; \
+	    read -p "Do you want to replace it? [y/N] " ans; \
+	    if [ "$$ans" != "y" ] && [ "$$ans" != "Y" ]; then \
+	        echo "Installation aborted."; \
+	        exit 1; \
+	    fi; \
+	    echo "Replacing existing file..."; \
 	    rm -f $(BIN_DIR)/$(TARGET); \
 	fi
 	@cp $(TARGET) $(BIN_DIR)/
@@ -36,5 +56,3 @@ clean:
 	@rm -f $(TARGET)
 	@rm -rf test
 	@echo "Clean complete."
-
-.PHONY: all build run install uninstall clean watch