Initial support for SQLCMD variables in sql project tree (#21574)

* initial changes

* sqlcmd node showing in tree

* Add edit sqlcmdvar command

* remove commands on sqlcmd vars  for now

* cleanup

* fix tests

* add icons

* remove TestProject

* add checks for undefined

* add variable

extensions/sql-database-projects/src/models/tree/sqlcmdVariableTreeItem.ts

@@ -0,0 +1,73 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as vscode from 'vscode';
+import * as path from 'path';
+import * as constants from '../../common/constants';
+
+import { BaseProjectTreeItem } from './baseTreeItem';
+import { ProjectRootTreeItem } from './projectTreeItem';
+import { IconPathHelper } from '../../common/iconHelper';
+
+/**
+ * Folder for containing SQLCMD variable nodes in the tree
+ */
+export class SqlCmdVariablesTreeItem extends BaseProjectTreeItem {
+	private sqlcmdVariables: SqlCmdVariableTreeItem[] = [];
+
+	constructor(project: ProjectRootTreeItem) {
+		super(vscode.Uri.file(path.join(project.projectUri.fsPath, constants.sqlcmdVariablesNodeName)), project);
+
+		this.construct();
+	}
+
+	private construct() {
+		const sqlCmdVariables = (this.parent as ProjectRootTreeItem).project.sqlCmdVariables;
+
+		if (!sqlCmdVariables) {
+			return;
+		}
+
+		for (const sqlCmdVariable of Object.keys(sqlCmdVariables)) {
+			if (sqlCmdVariable) {
+				this.sqlcmdVariables.push(new SqlCmdVariableTreeItem(sqlCmdVariable, this));
+			}
+		}
+	}
+
+	public get children(): SqlCmdVariableTreeItem[] {
+		return this.sqlcmdVariables;
+	}
+
+	public get treeItem(): vscode.TreeItem {
+		const sqlCmdVariableFolderItem = new vscode.TreeItem(this.projectUri, vscode.TreeItemCollapsibleState.Collapsed);
+		sqlCmdVariableFolderItem.contextValue = constants.DatabaseProjectItemType.sqlcmdVariablesRoot;
+		sqlCmdVariableFolderItem.iconPath = IconPathHelper.sqlCmdVariablesGroup;
+
+		return sqlCmdVariableFolderItem;
+	}
+}
+
+/**
+ * Represents a SQLCMD variable in a .sqlproj
+ */
+export class SqlCmdVariableTreeItem extends BaseProjectTreeItem {
+	constructor(private sqlcmdVar: string, sqlcmdVarsTreeItem: SqlCmdVariablesTreeItem) {
+		super(vscode.Uri.file(path.join(sqlcmdVarsTreeItem.projectUri.fsPath, sqlcmdVar)), sqlcmdVarsTreeItem);
+	}
+
+	public get children(): BaseProjectTreeItem[] {
+		return [];
+	}
+
+	public get treeItem(): vscode.TreeItem {
+		const sqlcmdVariableItem = new vscode.TreeItem(this.projectUri, vscode.TreeItemCollapsibleState.None);
+		sqlcmdVariableItem.label = this.sqlcmdVar;
+		sqlcmdVariableItem.contextValue = constants.DatabaseProjectItemType.sqlcmdVariable;
+		sqlcmdVariableItem.iconPath = IconPathHelper.sqlCmdVariable;
+
+		return sqlcmdVariableItem;
+	}
+}