Adapt the structure to parse the initial pip commands

packages/safe-chain/src/packagemanager/pip/createPipPackageManager.js

@@ -1,6 +1,11 @@
-import { ui } from "../../environment/userInteraction.js";
-import { safeSpawn } from "../../utils/safeSpawn.js";
-import { mergeSafeChainProxyEnvironmentVariables } from "../../registryProxy/registryProxy.js";
+import { commandArgumentScanner } from "./dependencyScanner/commandArgumentScanner.js";
+import { nullScanner } from "./dependencyScanner/nullScanner.js";
+import { runPip } from "./runPipCommand.js";
+import {
+  getPipCommandForArgs,
+  pipInstallCommand,
+  pipUninstallCommand,
+} from "./utils/pipCommands.js";
 
 /**
  * Creates a package manager interface for Python's pip package installer
@@ -8,28 +13,40 @@ import { mergeSafeChainProxyEnvironmentVariables } from "../../registryProxy/reg
  * @param {string} [command="pip"] - The pip command to use (e.g., "pip", "pip3") defaults to "pip"
  */
 export function createPipPackageManager(command = "pip") {
-  return {
-    runCommand: (args) => runPipCommand(command, args),
+  function isSupportedCommand(args) {
+    const scanner = findDependencyScannerForCommand(
+      commandScannerMapping,
+      args
+    );
+    return scanner.shouldScan(args);
+  }
 
-    // For pip, set proxy server
-    isSupportedCommand: () => false,
-    getDependencyUpdatesForCommand: () => [],
+  function getDependencyUpdatesForCommand(args) {
+    const scanner = findDependencyScannerForCommand(
+      commandScannerMapping,
+      args
+    );
+    return scanner.scan(args);
+  }
+
+  return {
+    runCommand: (args) => runPip(command, args),
+    isSupportedCommand,
+    getDependencyUpdatesForCommand,
   };
 }
 
-async function runPipCommand(command, args) {
-  try {
-    const result = await safeSpawn(command, args, {
-      stdio: "inherit",
-      env: mergeSafeChainProxyEnvironmentVariables(process.env),
-    });
-    return { status: result.status };
-  } catch (error) {
-    if (error.status) {
-      return { status: error.status };
-    } else {
-      ui.writeError("Error executing command:", error.message);
-      return { status: 1 };
-    }
+const commandScannerMapping = {
+  [pipInstallCommand]: commandArgumentScanner(),
+  [pipUninstallCommand]: nullScanner(), // Uninstall doesn't need scanning
+};
+
+function findDependencyScannerForCommand(scanners, args) {
+  const command = getPipCommandForArgs(args);
+  if (!command) {
+    return nullScanner();
   }
+
+  const scanner = scanners[command];
+  return scanner ? scanner : nullScanner();
 }

packages/safe-chain/src/packagemanager/pip/dependencyScanner/commandArgumentScanner.js

@@ -0,0 +1,27 @@
+/**
+ * Scanner for pip command arguments to detect package installations
+ * 
+ * @param {Object} options - Scanner options
+ * @param {boolean} [options.ignoreDryRun=false] - Whether to ignore dry-run flag
+ * @returns {Object} Scanner interface
+ */
+export function commandArgumentScanner(options = {}) {
+  const { ignoreDryRun = false } = options;
+
+  function shouldScan(args) {
+    // For now, pip scanning is not yet implemented
+    // This would need to detect 'install' commands and package arguments
+    return false;
+  }
+
+  function scan(args) {
+    // Future implementation would parse pip install arguments
+    // and return array of {name, version, type} objects
+    return [];
+  }
+
+  return {
+    shouldScan,
+    scan,
+  };
+}

packages/safe-chain/src/packagemanager/pip/dependencyScanner/nullScanner.js

@@ -0,0 +1,10 @@
+/**
+ * Null scanner that returns no dependencies
+ * Used when a command is not supported for scanning
+ */
+export function nullScanner() {
+  return {
+    shouldScan: () => false,
+    scan: () => [],
+  };
+}

packages/safe-chain/src/packagemanager/pip/parsing/parsePackagesFromInstallArgs.js

@@ -0,0 +1,62 @@
+/**
+ * Parses package specifications from pip install arguments
+ * 
+ * Pip supports various package specification formats:
+ * - package_name
+ * - package_name==version
+ * - package_name>=version
+ * - package_name~=version
+ * - git+https://...
+ * - -r requirements.txt
+ * - . (local directory)
+ * 
+ * @param {string[]} args - pip install command arguments
+ * @returns {Array<{name: string, version?: string, type: string}>} Array of package specifications
+ */
+export function parsePackagesFromInstallArgs(args) {
+  const packages = [];
+  let skipNext = false;
+
+  for (let i = 0; i < args.length; i++) {
+    const arg = args[i];
+
+    if (skipNext) {
+      skipNext = false;
+      continue;
+    }
+
+    // Skip the command itself (install, uninstall, etc.)
+    if (i === 0 && !arg.startsWith("-")) {
+      continue;
+    }
+
+    // Skip flags and their values
+    if (arg.startsWith("-")) {
+      // Some flags take a value, skip the next arg for those
+      if (arg === "-r" || arg === "--requirement" || 
+          arg === "-c" || arg === "--constraint" ||
+          arg === "-e" || arg === "--editable" ||
+          arg === "-t" || arg === "--target" ||
+          arg === "-i" || arg === "--index-url" ||
+          arg === "--extra-index-url") {
+        skipNext = true;
+      }
+      continue;
+    }
+
+    // TODO: Implement full parsing logic
+    // For now, this is a placeholder that would need to handle:
+    // - Version specifiers (==, >=, <=, ~=, !=, <, >)
+    // - VCS urls (git+, hg+, svn+, bzr+)
+    // - Local file paths
+    // - Requirements files (-r, --requirement)
+    // - Extras (package[extra1,extra2])
+
+    packages.push({
+      name: arg,
+      type: "add",
+    });
+  }
+
+  return packages;
+}

packages/safe-chain/src/packagemanager/pip/parsing/parsePackagesFromInstallArgs.spec.js

@@ -0,0 +1,40 @@
+import { describe, it } from "node:test";
+import assert from "node:assert";
+import { parsePackagesFromInstallArgs } from "./parsePackagesFromInstallArgs.js";
+
+describe("parsePackagesFromInstallArgs", () => {
+  it("should parse simple package name", () => {
+    const result = parsePackagesFromInstallArgs(["install", "requests"]);
+    assert.deepEqual(result, [
+      { name: "requests", type: "add" },
+    ]);
+  });
+
+  it("should parse package with version specifier", () => {
+    const result = parsePackagesFromInstallArgs(["install", "requests==2.28.0"]);
+    assert.deepEqual(result, [
+      { name: "requests==2.28.0", type: "add" },
+    ]);
+  });
+
+  it("should skip flags", () => {
+    const result = parsePackagesFromInstallArgs(["install", "--upgrade", "requests"]);
+    assert.deepEqual(result, [
+      { name: "requests", type: "add" },
+    ]);
+  });
+
+  it("should parse multiple packages", () => {
+    const result = parsePackagesFromInstallArgs(["install", "requests", "flask", "django==4.0"]);
+    assert.deepEqual(result, [
+      { name: "requests", type: "add" },
+      { name: "flask", type: "add" },
+      { name: "django==4.0", type: "add" },
+    ]);
+  });
+
+  it("should return empty array for no packages", () => {
+    const result = parsePackagesFromInstallArgs(["install", "--help"]);
+    assert.deepEqual(result, []);
+  });
+});

packages/safe-chain/src/packagemanager/pip/runPipCommand.js

@@ -0,0 +1,66 @@
+import { ui } from "../../environment/userInteraction.js";
+import { safeSpawn } from "../../utils/safeSpawn.js";
+import { mergeSafeChainProxyEnvironmentVariables } from "../../registryProxy/registryProxy.js";
+
+/**
+ * Runs a pip command with the specified arguments
+ * 
+ * @param {string} command - The pip command to use (e.g., "pip", "pip3")
+ * @param {string[]} args - Command arguments
+ * @returns {Promise<{status: number}>} Result object with status code
+ */
+export async function runPip(command, args) {
+  try {
+    const result = await safeSpawn(command, args, {
+      stdio: "inherit",
+      env: mergeSafeChainProxyEnvironmentVariables(process.env),
+    });
+    return { status: result.status };
+  } catch (error) {
+    if (error.status) {
+      return { status: error.status };
+    } else {
+      ui.writeError("Error executing command:", error.message);
+      return { status: 1 };
+    }
+  }
+}
+
+/**
+ * Runs a pip command in dry-run mode and captures output
+ * Note: pip doesn't have a native --dry-run flag, so this may need adjustment
+ * 
+ * @param {string} command - The pip command to use
+ * @param {string[]} args - Command arguments
+ * @returns {Promise<{status: number, output: string}>} Result with status and output
+ */
+export async function dryRunPipCommandAndOutput(command, args) {
+  try {
+    // Note: pip doesn't have a --dry-run flag like npm
+    // This would need to be implemented differently if dry-run functionality is needed
+    const result = await safeSpawn(
+      command,
+      args,
+      {
+        stdio: "pipe",
+        env: mergeSafeChainProxyEnvironmentVariables(process.env),
+      }
+    );
+    return {
+      status: result.status,
+      output: result.status === 0 ? result.stdout : result.stderr,
+    };
+  } catch (error) {
+    if (error.status) {
+      const output =
+        error.stdout?.toString() ??
+        error.stderr?.toString() ??
+        error.message ??
+        "";
+      return { status: error.status, output };
+    } else {
+      ui.writeError("Error executing command:", error.message);
+      return { status: 1 };
+    }
+  }
+}

packages/safe-chain/src/packagemanager/pip/utils/pipCommands.js

@@ -0,0 +1,29 @@
+/**
+ * Pip command constants
+ */
+export const pipInstallCommand = "install";
+export const pipUninstallCommand = "uninstall";
+export const pipListCommand = "list";
+export const pipShowCommand = "show";
+export const pipFreeze = "freeze";
+
+/**
+ * Gets the pip command from the arguments array
+ * 
+ * @param {string[]} args - Command line arguments
+ * @returns {string|null} The pip command or null if not found
+ */
+export function getPipCommandForArgs(args) {
+  if (!args || args.length === 0) {
+    return null;
+  }
+
+  // The first non-flag argument is typically the command
+  for (const arg of args) {
+    if (!arg.startsWith("-")) {
+      return arg;
+    }
+  }
+
+  return null;
+}