Install: Add checks to ensure installer dependencies are available (a…

…wslabs#702)

**Why?**

When running the make / install process of ADF, we need to ensure it will not
continue if some of the tools are not installed yet.

For example, in the past, if you did not install jq, it would still continue
with the build process. Resulting in a broken template at deployment time.

As reported in awslabs#696, the Python version in the environment was set to v3.8,
which resulted in a broken installation process too.

**What?**

* Updated the documentation to indicate that `jq` needs to be available too.
* Added checks in the build process to exit and warn the user about missing
  dependencies.
* Updated the version number of the Makefile.

Makefile

@@ -2,9 +2,14 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # Makefile versions
-MAKEFILE_VERSION := 2.0
+MAKEFILE_VERSION := 2.1
 UPDATE_VERSION := make/latest
 
+# This Makefile requires Python version 3.9 or later
+REQUIRED_PYTHON_MAJOR_VERSION := 3
+REQUIRED_PYTHON_MINOR_VERSION := 9
+PYTHON_EXECUTABLE := "python$(REQUIRED_PYTHON_MAJOR_VERSION)"
+
 # Repository versions
 SRC_VERSION := $(shell git describe --tags --match 'v[0-9]*')
 SRC_VERSION_TAG_ONLY := $(shell git describe --tags --abbrev=0 --match 'v[0-9]*')
@@ -50,7 +55,7 @@ all: build
 
 .venv/is_ready:
 	( \
-		test -d .venv || python3 -m venv .venv; \
+		test -d .venv || $(PYTHON_EXECUTABLE) -m venv .venv; \
 		touch .venv/is_ready; \
 	)
 
@@ -175,6 +180,48 @@ docs:
 	@echo "* $(CLR_BLUE)$(SRC_TAGGED_URL_BASE)/docs/user-guide.md$(CLR_END)"
 	@echo ""
 
+verify_tooling: .venv
+	@( \
+		. .venv/bin/activate; \
+		$(PYTHON_EXECUTABLE) --version &> /dev/null && \
+		( \
+			$(PYTHON_EXECUTABLE) -c "import sys; sys.version_info < ($(REQUIRED_PYTHON_MAJOR_VERSION),$(REQUIRED_PYTHON_MINOR_VERSION)) and sys.exit(1)" || \
+			( \
+				$(PYTHON_EXECUTABLE) --version && \
+				echo '$(CLR_RED)Python version is too old!$(CLR_END)' && \
+				echo '$(CLR_RED)Python v$(REQUIRED_PYTHON_MAJOR_VERSION).$(REQUIRED_PYTHON_MINOR_VERSION) or later is required.$(CLR_END)' && \
+				exit 1 \
+			) \
+		) || ( \
+			echo '$(CLR_RED)Python is not installed!$(CLR_END)' && \
+			exit 1 \
+		); \
+	)
+	@( \
+		docker --version &> /dev/null || ( \
+			echo '$(CLR_RED)Docker is not installed!$(CLR_END)' && \
+			exit 1 \
+		); \
+	)
+	@( \
+		git --version &> /dev/null || ( \
+			echo '$(CLR_RED)Git is not installed!$(CLR_END)' && \
+			exit 1 \
+		); \
+	)
+	@( \
+		sed --version &> /dev/null || ( \
+			echo '$(CLR_RED)Sed is not installed!$(CLR_END)' && \
+			exit 1 \
+		); \
+	)
+	@( \
+		jq --version &> /dev/null || ( \
+			echo '$(CLR_RED)Jq is not installed!$(CLR_END)' && \
+			exit 1 \
+		); \
+	)
+
 pre_build: build_deps docker version_number git_ignore
 
 pre_deps_build: deps docker version_number git_ignore
@@ -194,7 +241,7 @@ post_build:
 	@echo "$(CLR_GREEN)To deploy ADF, please run:$(CLR_END) make deploy"
 	@echo ""
 
-build: pre_build sam_build post_build
+build: verify_tooling pre_build sam_build post_build
 
 deps_build: pre_deps_build sam_build post_build
 

docs/installation-guide.md

@@ -73,7 +73,10 @@ Please note that building on *Windows* is not supported, please use the
     This should return 4.3 or later.
 - [python 3](https://www.python.org/downloads/)
   - To test if it is available, run `python --version`.
-    This should return 3.11 or later.
+    This should return 3.9 or later.
+- [jq](https://github.com/jqlang/jq)
+  - To test if it is available, run `jq --version`.
+    This version should be 1.6 or later.
 - [sed](https://www.gnu.org/software/sed/)
   - To test if it is available, run `sed --version`.
     This should return 4.3 or later.