Add support to build steampipe standalone FDW for pre-release versions of plugins

Author: pskrbasu

Makefile

@@ -14,7 +14,7 @@ install: build
 	fi
 
 # build standalone 
-standalone: validate_plugin prebuild.go
+standalone: validate_plugin validate_version prebuild.go
 	@echo "Building standalone FDW for plugin: $(plugin)"
 
 	# Remove existing work dir and create a new directory for the render process
@@ -26,7 +26,11 @@ standalone: validate_plugin prebuild.go
 
 	# Change to the new directory to perform operations
 	cd work && \
-	go run generate/generator.go templates . $(plugin) $(plugin_github_url) && \
+	go run generate/generator.go templates . $(plugin) $(plugin_version) $(plugin_github_url) && \
+	if [ ! -z "$(plugin_version)" ]; then \
+		echo "go get $(plugin_github_url)@$(plugin_version)" && \
+		go get $(plugin_github_url)@$(plugin_version); \
+	fi && \
 	go mod tidy && \
 	$(MAKE) -C ./fdw clean && \
 	$(MAKE) -C ./fdw go && \
@@ -43,7 +47,7 @@ standalone: validate_plugin prebuild.go
 	# binaries will be copied to build-${PLATFORM} folder
 
 # render target
-render: validate_plugin prebuild.go
+render: validate_plugin validate_version prebuild.go
 	@echo "Rendering code for plugin: $(plugin)"
 
 	# Remove existing work dir and create a new directory for the render process
@@ -55,7 +59,11 @@ render: validate_plugin prebuild.go
 
 	# Change to the new directory to perform operations
 	cd work && \
-	go run generate/generator.go templates . $(plugin) $(plugin_github_url) && \
+	go run generate/generator.go templates . $(plugin) $(plugin_version) $(plugin_github_url) && \
+	if [ ! -z "$(plugin_version)" ]; then \
+		echo "go get $(plugin_github_url)@$(plugin_version)" && \
+		go get $(plugin_github_url)@$(plugin_version); \
+	fi && \
 	go mod tidy
 
 	# Note: The work directory will contain the full code tree with rendered changes
@@ -84,9 +92,17 @@ build_from_work:
 	# Note: This target builds from the 'work' directory and copies binaries to the build-${PLATFORM} folder
 
 validate_plugin:
-    ifndef plugin
-	    $(error "You must specify the 'plugin' variable")
-    endif
+ifndef plugin
+	$(error "The 'plugin' variable is missing. Usage: make build plugin=<plugin_name> [plugin_version=<version>] [plugin_github_url=<url>]")
+endif
+
+# Check if plugin_github_url is provided when plugin_version is specified
+validate_version:
+ifdef plugin_version
+ifndef plugin_github_url
+	$(error "The 'plugin_github_url' variable is required when 'plugin_version' is specified")
+endif
+endif
 
 build: prebuild.go
 	$(MAKE) -C ./fdw clean

generate/generator.go

@@ -15,7 +15,7 @@ import (
 
 const templateExt = ".tmpl"
 
-func RenderDir(templatePath, root, plugin, pluginGithubUrl, pgVersion string) {
+func RenderDir(templatePath, root, plugin, pluginGithubUrl, pluginVersion, pgVersion string) {
 	var targetFilePath string
 	err := filepath.Walk(templatePath, func(filePath string, info os.FileInfo, err error) error {
 		if err != nil {
@@ -64,10 +64,12 @@ func RenderDir(templatePath, root, plugin, pluginGithubUrl, pgVersion string) {
 		data := struct {
 			Plugin          string
 			PluginGithubUrl string
+			PluginVersion   string
 			PgVersion       string
 		}{
 			plugin,
 			pluginGithubUrl,
+			pluginVersion,
 			pgVersion,
 		}
 
@@ -95,25 +97,35 @@ func RenderDir(templatePath, root, plugin, pluginGithubUrl, pgVersion string) {
 func main() {
 	// Check if the correct number of command-line arguments are provided
 	if len(os.Args) < 4 {
-		fmt.Println("Usage: go run generator.go <templatePath> <root> <plugin> [pluginGithubUrl]")
+		fmt.Println("Usage: go run generator.go <templatePath> <root> <plugin> [plugin_version] [pluginGithubUrl]")
 		return
 	}
 
 	templatePath := os.Args[1]
 	root := os.Args[2]
 	plugin := os.Args[3]
+	var pluginVersion string
 	var pluginGithubUrl string
 
-	fmt.Println(len(os.Args))
+	// Check if pluginVersion is provided as a command-line argument
+	if len(os.Args) >= 5 {
+		pluginVersion = os.Args[4]
+	}
 
 	// Check if PluginGithubUrl is provided as a command-line argument
-	if len(os.Args) == 5 {
-		pluginGithubUrl = os.Args[4]
+	if len(os.Args) >= 6 {
+		pluginGithubUrl = os.Args[5]
 	} else {
 		// If PluginGithubUrl is not provided, generate it based on PluginAlias
 		pluginGithubUrl = "github.com/turbot/steampipe-plugin-" + plugin
 	}
 
+	// If pluginVersion is provided but pluginGithubUrl is not, error out
+	if pluginVersion != "" && pluginGithubUrl == "" {
+		fmt.Println("Error: plugin_github_url is required when plugin_version is specified")
+		return
+	}
+
 	// Convert relative paths to absolute paths
 	absTemplatePath, err := filepath.Abs(templatePath)
 	if err != nil {
@@ -130,7 +142,7 @@ func main() {
 	// get the postgres version used
 	pgVersion := getPostgreSQLVersion()
 
-	RenderDir(absTemplatePath, absRoot, plugin, pluginGithubUrl, pgVersion)
+	RenderDir(absTemplatePath, absRoot, plugin, pluginGithubUrl, pluginVersion, pgVersion)
 }
 
 func getPostgreSQLVersion() string {