augustocdias · MarcelRobitaille · Jan 3, 2025 · Jan 3, 2025
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Change Log
 
+## [1.15.0] 2025-01-02
+
+- Add variable resolver for ${prompt} (#123)
+
 ## [1.14.1] 2024-12-24
 
 - Fix bug with multiselect active vs selected (#127)

diff --git a/README.md b/README.md
@@ -115,6 +115,10 @@ VSCode renders it like this:
 As of today, the extension supports variable substitution for:
 
 * a subset of predefined variables like `file`, `fileDirName`, `fileBasenameNoExtension`, `fileBasename`, `lineNumber`, `extension`, `workspaceFolder` and `workspaceFolderBasename`, pattern: `${variable}`
+* an arbitrary value via `prompt` (combine options using `&` like URL query strings):
+    * `${prompt}` to show an input box for an arbitrary value
+    * `${prompt:rememberPrevious=false}` to disable the default action of initializing the input box with the previous value
+    * `${prompt:prompt=Custom prompt text}` to configure the label of the input box to show `Custom prompt text`
 * the remembered value (the default value when `rememberPrevious` is true), available as `${rememberedValue}`
 * all config variables, pattern: `${config:variable}`
 * all environment variables (`tasks.json` `options.env` with fallback to parent process), pattern: `${env:variable}`

diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -3,7 +3,7 @@
   "displayName": "Tasks Shell Input",
   "description": "Use shell commands as input for your tasks",
   "icon": "icon.png",
-  "version": "1.14.1",
+  "version": "1.15.0",
   "publisher": "augustocdias",
   "repository": {
     "url": "https://github.com/augustocdias/vscode-shell-command"

diff --git a/src/extension.ts b/src/extension.ts
@@ -31,6 +31,8 @@ export function activate(this: any, context: vscode.ExtensionContext) {
 
     // Reimplementation of promptString that can be used from inputs.
     const handlePromptString = async () => {
+        vscode.window.showWarningMessage(
+            'shellCommand.promptString is deprecated. Please use `${prompt}`.');
         const inputValue = await vscode.window.showInputBox();
 
         return inputValue || '';

diff --git a/src/lib/CommandHandler.test.ts b/src/lib/CommandHandler.test.ts
@@ -7,6 +7,7 @@ import { describe, expect, test, vi, beforeEach } from 'vitest';
 import { ShellCommandOptions } from "./ShellCommandOptions";
 import { CommandHandler } from './CommandHandler';
 import { UserInputContext } from './UserInputContext';
+import { parseBoolean } from './options';
 import * as mockVscode from '../mocks/vscode';
 
 const mockExtensionContext = {
@@ -349,21 +350,21 @@ describe("Argument parsing", () => {
     });
 
     test("parseBoolean", () => {
-        expect(CommandHandler.parseBoolean(undefined, true)).toBe(true);
-        expect(CommandHandler.parseBoolean(undefined, false)).toBe(false);
+        expect(parseBoolean(undefined, true)).toBe(true);
+        expect(parseBoolean(undefined, false)).toBe(false);
 
-        expect(CommandHandler.parseBoolean(false, true)).toBe(false);
-        expect(CommandHandler.parseBoolean(true, false)).toBe(true);
+        expect(parseBoolean(false, true)).toBe(false);
+        expect(parseBoolean(true, false)).toBe(true);
 
-        expect(CommandHandler.parseBoolean("false", true)).toBe(false);
-        expect(CommandHandler.parseBoolean("fALse", true)).toBe(false);
-        expect(CommandHandler.parseBoolean("true", false)).toBe(true);
-        expect(CommandHandler.parseBoolean("tRUe", false)).toBe(true);
+        expect(parseBoolean("false", true)).toBe(false);
+        expect(parseBoolean("fALse", true)).toBe(false);
+        expect(parseBoolean("true", false)).toBe(true);
+        expect(parseBoolean("tRUe", false)).toBe(true);
 
         expect(mockVscode.window.getShowWarningMessageCalls().length).toBe(0);
 
-        expect(CommandHandler.parseBoolean(42, true)).toBe(true);
-        expect(CommandHandler.parseBoolean(42, false)).toBe(false);
+        expect(parseBoolean(42, true)).toBe(true);
+        expect(parseBoolean(42, false)).toBe(false);
 
         expect(mockVscode.window.getShowWarningMessageCalls().length).toBe(2);
     });

diff --git a/src/lib/CommandHandler.ts b/src/lib/CommandHandler.ts
@@ -5,6 +5,7 @@ import { VariableResolver, Input } from "./VariableResolver";
 import { ShellCommandException } from "../util/exceptions";
 import { UserInputContext } from "./UserInputContext";
 import { QuickPickItem } from "./QuickPickItem";
+import { parseBoolean } from "./options";
 
 function promisify<T extends unknown[], R>(fn: (...args: [...T, (err: Error | null, stdout: string, stderr: string) => void]) => R) {
     return (...args: [...T]) =>
@@ -67,40 +68,23 @@ export class CommandHandler {
 
     static resolveArgs(args: { [key: string]: unknown }): ShellCommandOptions {
         return {
-            useFirstResult: CommandHandler.parseBoolean(args.useFirstResult, false),
-            useSingleResult: CommandHandler.parseBoolean(args.useSingleResult, false),
-            rememberPrevious: CommandHandler.parseBoolean(args.rememberPrevious, false),
-            allowCustomValues: CommandHandler.parseBoolean(args.allowCustomValues, false),
-            warnOnStderr: CommandHandler.parseBoolean(args.warnOnStderr, true),
-            multiselect: CommandHandler.parseBoolean(args.multiselect, false),
+            useFirstResult: parseBoolean(args.useFirstResult, false),
+            useSingleResult: parseBoolean(args.useSingleResult, false),
+            rememberPrevious: parseBoolean(args.rememberPrevious, false),
+            allowCustomValues: parseBoolean(args.allowCustomValues, false),
+            warnOnStderr: parseBoolean(args.warnOnStderr, true),
+            multiselect: parseBoolean(args.multiselect, false),
             multiselectSeparator: args.multiselectSeparator ?? " ",
             stdio: ["stdout", "stderr", "both"].includes(args.stdio as string) ? args.stdio : "stdout",
             ...args,
         } as ShellCommandOptions;
     }
 
-    static parseBoolean(value: unknown, defaultValue: boolean): boolean {
-        if (value === undefined) {
-            return defaultValue;
-        }
-        if (typeof value === 'boolean') {
-            return value;
-        }
-        if (typeof value === 'string') {
-            if (value.toLowerCase() === 'true') {
-                return true;
-            } else if (value.toLowerCase() === 'false') {
-                return false;
-            }
-        }
-        vscode.window.showWarningMessage(`Cannot parse the boolean value: ${value}, use the default: ${defaultValue}`);
-        return defaultValue;
-    }
-
     protected async resolveArgs() {
         const resolver = new VariableResolver(
             this.input,
             this.userInputContext,
+            this.context,
             this.getDefault().join(this.args.multiselectSeparator));
 
         const command = await resolver.resolve(this.command);

diff --git a/src/lib/VariableResolver.test.ts b/src/lib/VariableResolver.test.ts
@@ -1,5 +1,6 @@
 import * as path from "path";
 
+import * as vscode from "vscode";
 import { expect, test } from 'vitest';
 
 import { VariableResolver } from './VariableResolver';
@@ -15,7 +16,13 @@ test('variable types', async () => {
     const input = {...tasksJson.inputs[0], workspaceIndex: 0};
     const rememberedValue = "Back in my day";
     const userInputContext = new UserInputContext();
-    const resolver = new VariableResolver(input, userInputContext, rememberedValue);
+    const context = {} as unknown as vscode.ExtensionContext;
+    const resolver = new VariableResolver(
+        input,
+        userInputContext,
+        context,
+        rememberedValue,
+    );
 
     for (const [key, value] of Object.entries({
         "workspaceFolder": workspaceFolder,

diff --git a/src/lib/VariableResolver.ts b/src/lib/VariableResolver.ts
@@ -1,6 +1,9 @@
 import * as vscode from 'vscode';
 import * as path from 'path';
+import * as querystring from 'querystring';
+
 import { UserInputContext } from './UserInputContext';
+import { parseBoolean } from './options';
 
 export type Input = {
     command: "shellCommand.execute";
@@ -17,6 +20,25 @@ export type Input = {
     env: Record<string, string>;
 }
 
+type PromptOptions = {
+    rememberPrevious: boolean;
+    prompt?: string;
+}
+
+function zip<A, B>(a: A[], b: B[]): [A, B][] {
+    return a.map(function(e, i) {
+        return [e, b[i]];
+    });
+}
+
+function resolvePromptOptions(queryString: string): PromptOptions {
+    const parsed = querystring.decode(queryString);
+    return {
+        prompt: (typeof parsed.prompt === "string") ? parsed.prompt : undefined,
+        rememberPrevious: parseBoolean(parsed.rememberPrevious, true),
+    };
+}
+
 export class VariableResolver {
     protected expressionRegex = /\$\{(.*?)\}/gm;
     protected workspaceIndexedRegex = /workspaceFolder\[(\d+)\]/gm;
@@ -26,24 +48,33 @@ export class VariableResolver {
     protected inputVarRegex = /input:(.+)/m;
     protected taskIdVarRegex = /taskId:(.+)/m;
     protected commandVarRegex = /command:(.+)/m;
+    protected promptVarRegex = /prompt(?::(.*)|)/m;
     protected rememberedValue?: string;
+    protected context: vscode.ExtensionContext;
     protected userInputContext: UserInputContext;
     protected input: Input;
 
     constructor(input: Input, userInputContext: UserInputContext,
+                context: vscode.ExtensionContext,
                 rememberedValue?: string) {
        this.userInputContext = userInputContext;
        this.rememberedValue = rememberedValue;
        this.input = input;
+       this.context = context;
     }
 
     async resolve(str: string): Promise<string | undefined> {
-        const promises: Promise<string | undefined>[] = [];
+        // Sort by index (descending)
+        // The indices will change once we start substituting the replacements,
+        // which are not necessarily the same length
+        const matches = [...str.matchAll(this.expressionRegex)]
+            .sort((a, b) => b.index - a.index);
 
         // Process the synchronous string interpolations
-        let result = str.replace(
-            this.expressionRegex,
-            (_: string, value: string): string => {
+        const data = await Promise.all(matches.map(
+            (match: RegExpExecArray): string | Thenable<string | undefined> => {
+                const value = match[1];
+
                 if (this.workspaceIndexedRegex.test(value)) {
                     return this.bindIndexedFolder(value);
                 }
@@ -59,27 +90,36 @@ export class VariableResolver {
 
                 const inputVar = this.inputVarRegex.exec(value);
                 if (inputVar) {
-                    return this.userInputContext.lookupInputValueByInputId(inputVar[1]) ?? '';
+                    return this.userInputContext
+                        .lookupInputValueByInputId(inputVar[1]) ?? '';
                 }
 
                 const taskIdVar = this.taskIdVarRegex.exec(value);
                 if (taskIdVar) {
-                    return this.userInputContext.lookupInputValueByTaskId(taskIdVar[1]) ?? '';
+                    return this.userInputContext
+                        .lookupInputValueByTaskId(taskIdVar[1]) ?? '';
                 }
 
                 if (this.commandVarRegex.test(value)) {
-                    // We don't replace these yet, they have to be done asynchronously
-                    promises.push(this.bindCommandVariable(value));
-                    return _;
+                    return this.bindCommandVariable(value);
+                }
+
+                const promptVar = this.promptVarRegex.exec(value);
+                if (promptVar) {
+                    return this.bindPrompt(
+                        resolvePromptOptions(promptVar[1]), match);
                 }
+
                 return this.bindConfiguration(value);
             },
-        );
+        ));
 
-        // Process the async string interpolations
-        const data = await Promise.all(promises) as string[];
-        result = result.replace(this.expressionRegex, () => data.shift() ?? '');
-        return result === '' ? undefined : result;
+        const result = zip(matches, data).reduce((str, [match, replacement]) => {
+            return str.slice(0, match.index) + replacement +
+                str.slice(match.index + match[0].length);
+        }, str);
+
+        return result;
     }
 
     protected async bindCommandVariable(value: string): Promise<string> {
@@ -93,6 +133,25 @@ export class VariableResolver {
         return result as string;
     }
 
+    protected async bindPrompt(
+        promptOptions: PromptOptions,
+        match: RegExpExecArray,
+    ): Promise<string> {
+        const taskId = this.input.args.taskId ?? this.input.id;
+        const promptId = `prompt/${taskId}_${match.index}`;
+        const prevValue = this.context.workspaceState.get<string>(promptId, '');
+        const initialValue = promptOptions.rememberPrevious ? prevValue : '';
+
+        const result = (await vscode.window.showInputBox({
+            value: initialValue,
+            prompt: promptOptions.prompt,
+        })) ?? '';
+
+        this.context.workspaceState.update(promptId, result);
+
+        return result;
+    }
+
     protected bindIndexedFolder(value: string): string {
         return value.replace(
             this.workspaceIndexedRegex,

diff --git a/src/lib/options.ts b/src/lib/options.ts
@@ -0,0 +1,19 @@
+import * as vscode from "vscode";
+
+export function parseBoolean(value: unknown, defaultValue: boolean): boolean {
+    if (value === undefined) {
+        return defaultValue;
+    }
+    if (typeof value === 'boolean') {
+        return value;
+    }
+    if (typeof value === 'string') {
+        if (value.toLowerCase() === 'true') {
+            return true;
+        } else if (value.toLowerCase() === 'false') {
+            return false;
+        }
+    }
+    vscode.window.showWarningMessage(`Cannot parse the boolean value: ${value}, use the default: ${defaultValue}`);
+    return defaultValue;
+}