# FastAPI CLI

**FastAPI CLI** 是一個命令列程式，能用來運行你的 FastAPI 應用程式、管理你的 FastAPI 專案等。

當你安裝 FastAPI（例如使用 `pip install "fastapi[standard]"`），它會包含一個叫做 `fastapi-cli` 的套件，這個套件提供了 `fastapi` 命令。

要運行你的 FastAPI 應用程式來進行開發，你可以使用 `fastapi dev` 命令：

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

import com.google.common.jimfs.Jimfs;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.DefaultParser;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.maven.Maven;
import org.apache.maven.api.Constants;
import org.apache.maven.cli.transfer.ConsoleMavenTransferListener;

 -----
 Hervé Boutemy
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 2025-11-16
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Maven 4 API - CLI

 This is the {{{./apidocs/org/apache/maven/api/cli/package-summary.html}API}} for Maven's command-line interface and
 tools:

   * <<<{{{./apidocs/org/apache/maven/api/cli/mvn/package-summary.html}mvn}}>>>, the Maven build tool,

   * <<<{{{./apidocs/org/apache/maven/api/cli/mvnenc/package-summary.html}mvnenc}}>>>, the Maven Password Encryption tool,

Wrapper SPDX-License-Identifier: Apache-2.0 Main-Class: org.gradle.wrapper.GradleWrapperMain Enable-Native-Access: ALL-UNNAMED org/gradle/cli/CommandLineArgumentE.class package org.gradle.cli; public final class CommandLineArgumentE extends RuntimeException { public void CommandLineArgumentE(String); } org/gradle/cli/CommandLineOption.class package org.gradle.cli; public final class CommandLineOption { public final java.util.HashSet options; public Class argumentType; public String description; public...

 * <p>The main components are:</p>
 * <ul>
 *   <li>{@link org.apache.maven.api.cli.Invoker} - Base interface for executing Maven tools</li>
 *   <li>{@link org.apache.maven.api.cli.Parser} - Processes command-line arguments into invoker requests</li>
 *   <li>{@link org.apache.maven.api.cli.Options} - Represents Maven configuration options</li>
 *   <li>{@link org.apache.maven.api.cli.extensions.CoreExtensions} - Manages Maven core extensions</li>
 * </ul>
 *

import java.util.Optional;
import java.util.function.Consumer;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.ParseException;
import org.apache.maven.api.annotations.Nonnull;
import org.apache.maven.api.cli.Options;
import org.apache.maven.api.cli.ParserRequest;
import org.apache.maven.api.cli.mvnup.UpgradeOptions;
import org.apache.maven.cling.invoker.CommonsCliOptions;

/**

import java.io.InputStream;
import java.io.OutputStream;

import org.apache.maven.api.annotations.Nullable;
import org.apache.maven.api.cli.Invoker;
import org.apache.maven.api.cli.InvokerException;
import org.apache.maven.api.cli.Parser;
import org.apache.maven.api.cli.ParserRequest;
import org.apache.maven.api.services.MessageBuilderFactory;
import org.apache.maven.cling.invoker.logging.SystemLogger;

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-api</artifactId>
    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-api-cli</artifactId>
  <name>Maven 4 API :: CLI</name>
  <description>Maven 4 API - CLI.</description>

  <dependencies>
    <dependency>
      <groupId>org.apache.maven</groupId>
      <artifactId>maven-api-annotations</artifactId>
    </dependency>

  <parent>
    <groupId>org.apache.maven</groupId>
    <artifactId>maven-impl-modules</artifactId>
    <version>4.1.0-SNAPSHOT</version>
  </parent>

  <artifactId>maven-cli</artifactId>

  <name>Maven 4 CLI</name>
  <description>Maven 4 CLI component, with CLI and logging support.</description>

  <dependencies>
    <!--  Maven4 API -->
    <dependency>
      <groupId>org.apache.maven</groupId>

 * under the License.
 */
package org.apache.maven.cling.invoker.mvnsh;

import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.ParseException;
import org.apache.maven.api.cli.Options;
import org.apache.maven.api.cli.mvnsh.ShellOptions;
import org.apache.maven.cling.invoker.CommonsCliOptions;

/**
 * Implementation of {@link ShellOptions} (base + shell).
 */