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variableResoler.ts
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232 lines (198 loc) · 9.66 KB
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
import * as _ from "lodash";
import * as path from "path";
import * as vscode from "vscode";
export interface IProcessEnv {
[key: string]: string | undefined;
}
function isWin(): boolean {
return /^win/.test(process.platform);
}
function hasDriveLetter(_path: string): boolean {
return isWindows && _path && _path[1] === ":";
}
function normalizeDriveLetter(_path: string): string {
if (hasDriveLetter(_path)) {
return _path.charAt(0).toUpperCase() + _path.slice(1);
}
return _path;
}
const isWindows = isWin();
export class VariableResolver {
private static VARIABLE_REGEXP = /\$\{(.*?)\}/g;
public constructor(private readonly _envVariables: IProcessEnv = process.env) {
if (isWindows) {
this._envVariables = Object.create(null);
Object.keys(_envVariables).forEach((key) => {
this._envVariables[key.toLowerCase()] = _envVariables[key];
});
}
}
public resolveString(folderUri: vscode.Uri, value: string): string {
const filePath = this.getFilePath();
return value.replace(VariableResolver.VARIABLE_REGEXP, (match: string, variable: string) => {
let argument: string;
const parts = variable.split(":");
if (parts && parts.length > 1) {
variable = parts[0];
argument = parts[1];
}
switch (variable) {
case "env":
if (argument) {
if (isWindows) {
argument = argument.toLowerCase();
}
const env = this._envVariables[argument];
if (_.isString(env)) {
return env;
}
// For `env` we should do the same as a normal shell does - evaluates missing envs to an empty string #46436
return "";
}
throw new Error(`missingEnvVarName: '${match}' can not be resolved because no environment variable name is given.`);
case "config":
if (argument) {
const config = this.getConfigurationValue(folderUri, argument);
if (_.isUndefined(config) || _.isNull(config)) {
throw new Error(`configNotFound: '${match}' can not be resolved because setting '${argument}' not found.`);
}
if (_.isObject(config)) {
throw new Error(`configNoString: '${match}' can not be resolved because '${argument}' is a structured value.`);
}
return config;
}
throw new Error(`missingConfigName: '${match}' can not be resolved because no settings name is given.`);
default: {
// common error handling for all variables that require an open folder and accept a folder name argument
switch (variable) {
case "workspaceRoot":
case "workspaceFolder":
case "workspaceRootFolderName":
case "workspaceFolderBasename":
case "relativeFile":
if (argument) {
const folder = this.getFolderUri(argument);
if (folder) {
folderUri = folder;
} else {
throw new Error(`canNotFindFolder: '${match}' can not be resolved. No such folder '${argument}'.`);
}
}
if (!folderUri) {
if (this.getWorkspaceFolderCount() > 1) {
throw new Error(`canNotResolveWorkspaceFolderMultiRoot: '${match}' ` +
`can not be resolved in a multi folder workspace. ` +
`Scope this variable using ":' and a workspace folder name.`);
}
throw new Error(`canNotResolveWorkspaceFolder: '${match}' can not be resolved. Please open a folder.`);
}
break;
default:
break;
}
// common error handling for all variables that require an open file
switch (variable) {
case "file":
case "relativeFile":
case "fileDirname":
case "fileExtname":
case "fileBasename":
case "fileBasenameNoExtension":
if (!filePath) {
throw new Error(`canNotResolveFile: '${match}' can not be resolved. Please open an editor.`);
}
break;
default:
break;
}
switch (variable) {
case "workspaceRoot":
case "workspaceFolder":
return normalizeDriveLetter(folderUri.fsPath);
case "cwd":
return folderUri ? normalizeDriveLetter(folderUri.fsPath) : process.cwd();
case "workspaceRootFolderName":
case "workspaceFolderBasename":
return path.basename(folderUri.fsPath);
case "lineNumber":
const lineNumber = this.getLineNumber();
if (lineNumber) {
return lineNumber;
}
throw new Error(`canNotResolveLineNumber: '${match}' can not be resolved.` +
` Make sure to have a line selected in the active editor.`);
case "selectedText":
const selectedText = this.getSelectedText();
if (selectedText) {
return selectedText;
}
throw new Error(`canNotResolveSelectedText: '${match}' can not be resolved.` +
` Make sure to have some text selected in the active editor.`);
case "file":
return filePath;
case "relativeFile":
if (folderUri) {
return path.normalize(path.relative(folderUri.fsPath, filePath));
}
return filePath;
case "fileDirname":
return path.dirname(filePath);
case "fileExtname":
return path.extname(filePath);
case "fileBasename":
return path.basename(filePath);
case "fileBasenameNoExtension":
const basename = path.basename(filePath);
return basename.slice(0, basename.length - path.extname(basename).length);
case "execPath":
const ep = process.execPath;
if (ep) {
return ep;
}
return match;
default:
return match;
}
}
}
});
}
private getFilePath(): string | undefined {
const activeEditor = vscode.window.activeTextEditor;
if (activeEditor) {
const resource = activeEditor.document.uri;
if (resource.scheme === "file") {
return path.normalize(resource.fsPath);
}
}
return undefined;
}
private getSelectedText(): string | undefined {
const activeTextEditor = vscode.window.activeTextEditor;
if (activeTextEditor && activeTextEditor.selection) {
return activeTextEditor.document.getText(activeTextEditor.selection);
}
return undefined;
}
private getLineNumber(): string | undefined {
const activeTextEditor = vscode.window.activeTextEditor;
if (activeTextEditor && activeTextEditor.selection) {
return String(activeTextEditor.selection.start.line);
}
return undefined;
}
private getConfigurationValue(folderUri: vscode.Uri, suffix: string): string {
const configuration = vscode.workspace.getConfiguration(undefined, folderUri);
const configValue = configuration.get(suffix);
return String(configValue);
}
private getWorkspaceFolderCount(): number {
return vscode.workspace.workspaceFolders.length;
}
private getFolderUri(folderName: string): vscode.Uri {
const folder = vscode.workspace.workspaceFolders.filter((f) => f.name === folderName).pop();
return folder ? folder.uri : undefined;
}
}