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[python] Add a CLI command to import pip requirements.txt (#652)
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examples/applications/python-processor-exclamation/python/requirements.txt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| uvicorn==0.12.2 | ||
| fastapi==0.63.0 |
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langstream-cli/src/main/java/ai/langstream/cli/commands/RootPythonCmd.java
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| /* | ||
| * Copyright DataStax, Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package ai.langstream.cli.commands; | ||
|
|
||
| import ai.langstream.cli.commands.python.LoadPythonDependenciesCmd; | ||
| import lombok.Getter; | ||
| import picocli.CommandLine; | ||
|
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| @CommandLine.Command( | ||
| name = "python", | ||
| header = "Tools for Python developers", | ||
| subcommands = {LoadPythonDependenciesCmd.class}) | ||
| @Getter | ||
| public class RootPythonCmd { | ||
| @CommandLine.ParentCommand private RootCmd rootCmd; | ||
| } |
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langstream-cli/src/main/java/ai/langstream/cli/commands/python/BasePythonCmd.java
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| /* | ||
| * Copyright DataStax, Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package ai.langstream.cli.commands.python; | ||
|
|
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| import ai.langstream.cli.commands.BaseCmd; | ||
| import ai.langstream.cli.commands.RootCmd; | ||
| import ai.langstream.cli.commands.RootPythonCmd; | ||
| import picocli.CommandLine; | ||
|
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| public abstract class BasePythonCmd extends BaseCmd { | ||
|
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| @CommandLine.ParentCommand private RootPythonCmd rootPythonCmd; | ||
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| @Override | ||
| protected RootCmd getRootCmd() { | ||
| return rootPythonCmd.getRootCmd(); | ||
| } | ||
| } |
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...stream-cli/src/main/java/ai/langstream/cli/commands/python/LoadPythonDependenciesCmd.java
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|---|---|---|
| @@ -0,0 +1,203 @@ | ||
| /* | ||
| * Copyright DataStax, Inc. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package ai.langstream.cli.commands.python; | ||
|
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| import ai.langstream.cli.commands.VersionProvider; | ||
| import ai.langstream.cli.util.DockerImageUtils; | ||
| import java.io.File; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.time.Duration; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.concurrent.CompletableFuture; | ||
| import java.util.concurrent.Executors; | ||
| import java.util.concurrent.atomic.AtomicReference; | ||
| import lombok.SneakyThrows; | ||
| import org.apache.commons.io.input.Tailer; | ||
| import org.apache.commons.io.input.TailerListener; | ||
| import picocli.CommandLine; | ||
|
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| @CommandLine.Command( | ||
| name = "load-pip-requirements", | ||
| header = "Process python dependencies in requirements.txt") | ||
| public class LoadPythonDependenciesCmd extends BasePythonCmd { | ||
|
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| private static final AtomicReference<ProcessHandle> dockerProcess = new AtomicReference<>(); | ||
|
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| @CommandLine.Option( | ||
| names = {"-app", "--application"}, | ||
| description = "Application directory path", | ||
| required = true) | ||
| private String appPath; | ||
|
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| @CommandLine.Option( | ||
| names = {"--docker-args"}, | ||
| description = "Additional docker arguments") | ||
| private List<String> dockerAdditionalArgs = new ArrayList<>(); | ||
|
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| @CommandLine.Option( | ||
| names = {"--docker-command"}, | ||
| description = "Command to run docker") | ||
| private String dockerCommand = "docker"; | ||
|
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| @CommandLine.Option( | ||
| names = {"--langstream-runtime-version"}, | ||
| description = "Version of the LangStream runtime to use") | ||
| private String dockerImageVersion = VersionProvider.getMavenVersion(); | ||
|
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| @CommandLine.Option( | ||
| names = {"--langstream-runtime-docker-image"}, | ||
| description = "Docker image of the LangStream runtime to use") | ||
| private String dockerImageName; | ||
|
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| @Override | ||
| @SneakyThrows | ||
| public void run() { | ||
|
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| DockerImageUtils.DockerImage dockerImage = | ||
| DockerImageUtils.computeDockerImage(dockerImageVersion, dockerImageName); | ||
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| if (appPath == null || appPath.isEmpty()) { | ||
| throw new IllegalArgumentException("application files are required"); | ||
| } | ||
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| final File appDirectory = new File(appPath); | ||
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| log("Using docker image: " + dockerImage.getFullName()); | ||
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| downloadDependencies(appDirectory.toPath(), getClient(), this::log); | ||
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| Runtime.getRuntime().addShutdownHook(new Thread(this::cleanEnvironment)); | ||
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| executeOnDocker(appDirectory, dockerImage); | ||
| } | ||
|
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| private void cleanEnvironment() { | ||
| if (dockerProcess.get() != null) { | ||
| dockerProcess.get().destroyForcibly(); | ||
| } | ||
| } | ||
|
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| private void executeOnDocker(File appDirectory, DockerImageUtils.DockerImage dockerImage) | ||
| throws Exception { | ||
| final File appTmp = appDirectory; | ||
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| File pythonDirectory = new File(appDirectory, "python"); | ||
| if (!pythonDirectory.isDirectory()) { | ||
| throw new IllegalArgumentException( | ||
| "Directory " + pythonDirectory.getAbsolutePath() + " not found"); | ||
| } | ||
| File requirementsFile = new File(pythonDirectory, "requirements.txt"); | ||
| if (!requirementsFile.isFile()) { | ||
| throw new IllegalArgumentException( | ||
| "File " | ||
| + requirementsFile.getAbsolutePath() | ||
| + " not found in " | ||
| + pythonDirectory); | ||
| } | ||
|
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| String imageName = dockerImage.getFullName(); | ||
| List<String> commandLine = new ArrayList<>(); | ||
| commandLine.add(dockerCommand); | ||
|
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| /* | ||
| docker run --rm \ | ||
| -v $(pwd):/app-code-download \ | ||
| --entrypoint "" \ | ||
| -w /app-code-download/python ghcr.io/langstream/langstream-runtime:0.1.0 \ | ||
| /bin/bash -c 'pip3 install --target ./lib --upgrade --prefer-binary -r requirements.txt' | ||
| */ | ||
|
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| commandLine.add("run"); | ||
| commandLine.add("--rm"); | ||
| commandLine.add("--entrypoint"); | ||
| commandLine.add("/bin/bash"); | ||
| commandLine.add("-w"); | ||
| commandLine.add("/code/application/python"); | ||
|
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| commandLine.add("-v"); | ||
| commandLine.add(appTmp.getAbsolutePath() + ":/code/application"); | ||
|
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| if (dockerAdditionalArgs != null) { | ||
| commandLine.addAll(dockerAdditionalArgs); | ||
| } | ||
|
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| commandLine.add(imageName); | ||
|
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| if (getRootCmd().isVerbose()) { | ||
| System.out.println("Executing:"); | ||
| System.out.println(String.join(" ", commandLine)); | ||
| } | ||
|
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| commandLine.add("-c"); | ||
| commandLine.add( | ||
| "pip3 install --target ./lib --upgrade --prefer-binary -r requirements.txt"); | ||
|
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| final Path outputLog = Files.createTempFile("langstream", ".log"); | ||
| log("Logging to file: " + outputLog.toAbsolutePath()); | ||
| ProcessBuilder processBuilder = | ||
| new ProcessBuilder(commandLine) | ||
| .redirectErrorStream(true) | ||
| .redirectOutput(outputLog.toFile()); | ||
| Process process = processBuilder.start(); | ||
| dockerProcess.set(process.toHandle()); | ||
| CompletableFuture.runAsync( | ||
| () -> tailLogSysOut(outputLog), Executors.newSingleThreadExecutor()); | ||
|
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| final int exited = process.waitFor(); | ||
| // wait for the log to be printed | ||
| Thread.sleep(1000); | ||
| if (exited != 0) { | ||
| throw new RuntimeException("Process exited with code " + exited); | ||
| } | ||
| } | ||
|
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| private void tailLogSysOut(Path outputLog) { | ||
|
|
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| TailerListener listener = | ||
| new TailerListener() { | ||
| @Override | ||
| public void fileNotFound() {} | ||
|
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| @Override | ||
| public void fileRotated() {} | ||
|
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| @Override | ||
| public void handle(Exception e) {} | ||
|
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| @Override | ||
| public void handle(String s) { | ||
| log(s); | ||
| } | ||
|
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| @Override | ||
| public void init(Tailer tailer) {} | ||
| }; | ||
| try (final Tailer tailer = | ||
| Tailer.builder() | ||
| .setTailerListener(listener) | ||
| .setStartThread(false) | ||
| .setDelayDuration(Duration.ofMillis(100)) | ||
| .setFile(outputLog.toFile()) | ||
| .get(); ) { | ||
| while (true) { | ||
| tailer.run(); | ||
| } | ||
| } | ||
| } | ||
| } |
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