parse-my-command
Version:
Parse argv with Commander.js without executing the command
152 lines (148 loc) • 19.5 kB
JavaScript
// src/index.ts
import camelCase from "camelcase";
import {
Command,
Option
} from "commander";
// src/noop.ts
var noop = () => {};
// src/index.ts
var commandSettingKeys = [
"_allowExcessArguments",
"_allowUnknownOption",
"_combineFlagAndOptionalValue",
"_defaultCommandName",
"_enablePositionalOptions",
"_passThroughOptions"
];
var getOrThrow = (map, key) => {
const value = map.get(key);
if (value === undefined) {
throw new Error("Expected map value to be present");
}
return value;
};
var findMissingOptions = (command, providedOptionsByCommand) => {
const missingOptionsByCommand = new Map;
let currentCommand = command;
while (currentCommand) {
const missingOptions = new Set;
const providedOptions = providedOptionsByCommand.get(currentCommand);
for (const option of currentCommand.options) {
const optionName = option.negate ? option.long?.replace(/^--no-/, "") : option.long ?? option.short;
if (!optionName) {
continue;
}
const key = camelCase(optionName);
if (providedOptions?.[key] !== undefined) {
continue;
}
missingOptions.add(key);
}
missingOptionsByCommand.set(currentCommand, missingOptions);
currentCommand = currentCommand.parent;
}
return missingOptionsByCommand;
};
var copyCommandSettings = (source, target) => {
const sourcePrivateState = source;
const targetPrivateState = target;
for (const key of commandSettingKeys) {
targetPrivateState[key] = sourcePrivateState[key];
}
target.name(source.name());
target.aliases(source.aliases());
for (const argument of source.registeredArguments) {
target.addArgument(argument);
}
const version = source.version();
if (version) {
target.version(version, source.options.find((option) => option.attributeName() === sourcePrivateState._versionOptionName)?.flags);
}
};
var disableCommandOutput = (command) => {
command.configureOutput({
writeOut: noop,
writeErr: noop,
outputError: noop
});
};
var cloneOption = (option) => {
const newOption = new Option(option.flags, option.description);
newOption.makeOptionMandatory(false);
newOption.default(option.defaultValue, option.defaultValueDescription);
newOption.preset(option.presetArg);
newOption.env(option.envVar);
if (option.parseArg) {
newOption.argParser(option.parseArg);
}
if (option.argChoices) {
newOption.choices(option.argChoices);
}
newOption.conflicts(option.conflictsWith);
newOption.implied = option.implied;
return newOption;
};
var partialParse = (command, argv, options) => {
const providedOptions = new Map;
const providedOptionsSources = new Map;
const commandsMap = new Map;
let matchedCommand;
const setProvidedOptionSource = (command2, optionKey, source) => {
if (!source) {
return;
}
const sourcesMap = providedOptionsSources.get(command2) ?? new Map;
sourcesMap.set(optionKey, source);
providedOptionsSources.set(command2, sourcesMap);
};
const createParserCommand = (parserCommand2, command2) => {
commandsMap.set(parserCommand2, command2);
copyCommandSettings(command2, parserCommand2);
disableCommandOutput(parserCommand2);
parserCommand2.exitOverride();
for (const option of command2.options) {
if (parserCommand2.options.some((parserCommandOption) => parserCommandOption.flags === option.flags)) {
continue;
}
parserCommand2.addOption(cloneOption(option));
}
parserCommand2.hook("preSubcommand", (thisCommand, actionCommand) => {
for (const cmd of [thisCommand, actionCommand]) {
const originalCommand = getOrThrow(commandsMap, cmd);
providedOptions.set(originalCommand, cmd.opts());
for (const optionKey of Object.keys(cmd.opts())) {
setProvidedOptionSource(originalCommand, optionKey, cmd.getOptionValueSource(optionKey));
}
}
});
parserCommand2.action(() => {
const originalCommand = getOrThrow(commandsMap, parserCommand2);
providedOptions.set(originalCommand, parserCommand2.opts());
for (const optionKey of Object.keys(parserCommand2.opts())) {
setProvidedOptionSource(originalCommand, optionKey, parserCommand2.getOptionValueSource(optionKey));
}
matchedCommand = command2;
});
for (const subcommand of command2.commands) {
const parserSubcommand = parserCommand2.command(subcommand.name());
createParserCommand(parserSubcommand, subcommand);
}
return parserCommand2;
};
const parserCommand = createParserCommand(new Command, command);
parserCommand.parse(argv, options);
const missingOptions = matchedCommand ? findMissingOptions(matchedCommand, providedOptions) : new Map;
return {
matchedCommand,
missingOptions,
providedOptions,
providedOptionsSources
};
};
export {
partialParse,
findMissingOptions
};
//# debugId=0F2D30EA8353D1EC64756E2164756E21
//# sourceMappingURL=data:application/json;base64,{
  "version": 3,
  "sources": ["../src/index.ts", "../src/noop.ts"],
  "sourcesContent": [
    "import camelCase from \"camelcase\";\nimport {\n  Command,\n  Option,\n  type OptionValueSource,\n  type OptionValues,\n  type ParseOptions,\n} from \"commander\";\nimport { noop } from \"./noop.js\";\n\nconst commandSettingKeys = [\n  \"_allowExcessArguments\",\n  \"_allowUnknownOption\",\n  \"_combineFlagAndOptionalValue\",\n  \"_defaultCommandName\",\n  \"_enablePositionalOptions\",\n  \"_passThroughOptions\",\n] as const;\n\ntype CommandSettingKey = (typeof commandSettingKeys)[number];\ntype CommandPrivateState = Command &\n  Record<CommandSettingKey, unknown> & {\n    _versionOptionName?: string;\n  };\n\nconst getOrThrow = <Key, Value>(map: Map<Key, Value>, key: Key): Value => {\n  const value = map.get(key);\n  if (value === undefined) {\n    throw new Error(\"Expected map value to be present\");\n  }\n\n  return value;\n};\n\nexport const findMissingOptions = (\n  command: Command,\n  providedOptionsByCommand: Map<Command, OptionValues>,\n) => {\n  const missingOptionsByCommand = new Map<Command, Set<string>>();\n\n  let currentCommand: Command | undefined | null = command;\n\n  while (currentCommand) {\n    const missingOptions = new Set<string>();\n    const providedOptions = providedOptionsByCommand.get(currentCommand);\n    for (const option of currentCommand.options) {\n      const optionName = option.negate\n        ? option.long?.replace(/^--no-/, \"\")\n        : (option.long ?? option.short);\n      if (!optionName) {\n        continue;\n      }\n\n      const key = camelCase(optionName);\n\n      if (providedOptions?.[key] !== undefined) {\n        continue;\n      }\n\n      missingOptions.add(key);\n    }\n\n    missingOptionsByCommand.set(currentCommand, missingOptions);\n    currentCommand = currentCommand.parent;\n  }\n\n  return missingOptionsByCommand;\n};\n\nexport type PartialParseResult = {\n  /**\n   * The command whose action will be executed\n   */\n  matchedCommand: Command | undefined;\n  /**\n   * A map of commands to a set of missing options for that command\n   */\n  missingOptions: Map<Command, Set<string>>;\n  /**\n   * A map of commands to the options provided for that command\n   */\n  providedOptions: Map<Command, OptionValues>;\n  /**\n   * A map of commands to a map of option keys to the source of the option value\n   */\n  providedOptionsSources: Map<\n    Command,\n    Map<string, OptionValueSource | undefined>\n  >;\n};\n\nconst copyCommandSettings = (source: Command, target: Command) => {\n  const sourcePrivateState = source as CommandPrivateState;\n  const targetPrivateState = target as CommandPrivateState;\n\n  for (const key of commandSettingKeys) {\n    targetPrivateState[key] = sourcePrivateState[key];\n  }\n\n  target.name(source.name());\n  target.aliases(source.aliases());\n  for (const argument of source.registeredArguments) {\n    target.addArgument(argument);\n  }\n\n  const version = source.version();\n  if (version) {\n    target.version(\n      version,\n      source.options.find(\n        (option) =>\n          option.attributeName() === sourcePrivateState._versionOptionName,\n      )?.flags,\n    );\n  }\n};\n\nconst disableCommandOutput = (command: Command) => {\n  command.configureOutput({\n    writeOut: noop,\n    writeErr: noop,\n    outputError: noop,\n  });\n};\n\nconst cloneOption = (option: Option) => {\n  const newOption = new Option(option.flags, option.description);\n  newOption.makeOptionMandatory(false);\n  newOption.default(option.defaultValue, option.defaultValueDescription);\n\n  newOption.preset((option as Option & { presetArg: unknown }).presetArg);\n  newOption.env((option as Option & { envVar: string }).envVar);\n  if (option.parseArg) {\n    newOption.argParser(option.parseArg);\n  }\n\n  if (option.argChoices) {\n    newOption.choices(option.argChoices);\n  }\n\n  newOption.conflicts(\n    (option as Option & { conflictsWith: string[] }).conflictsWith,\n  );\n\n  (newOption as Option & { implied: unknown }).implied = (\n    option as Option & { implied: unknown }\n  ).implied;\n\n  return newOption;\n};\n\n/**\n * Partially parse argv for a command without executing the action. @see {@link Command.parse}\n *\n * @returns An object containing the matched command, the provided options, and the missing options.\n */\nexport const partialParse = (\n  command: Command,\n  argv: readonly string[],\n  options?: ParseOptions,\n): PartialParseResult => {\n  const providedOptions = new Map<Command, OptionValues>();\n  const providedOptionsSources = new Map<\n    Command,\n    Map<string, OptionValueSource | undefined>\n  >();\n  const commandsMap = new Map<Command, Command>();\n  let matchedCommand: Command | undefined;\n\n  const setProvidedOptionSource = (\n    command: Command,\n    optionKey: string,\n    source: OptionValueSource | undefined,\n  ) => {\n    if (!source) {\n      return;\n    }\n\n    const sourcesMap =\n      providedOptionsSources.get(command) ??\n      new Map<string, OptionValueSource>();\n    sourcesMap.set(optionKey, source);\n    providedOptionsSources.set(command, sourcesMap);\n  };\n\n  const createParserCommand = (parserCommand: Command, command: Command) => {\n    commandsMap.set(parserCommand, command);\n\n    copyCommandSettings(command, parserCommand);\n    disableCommandOutput(parserCommand);\n    parserCommand.exitOverride();\n\n    for (const option of command.options) {\n      // Skip adding the option if it's already registered\n      if (\n        parserCommand.options.some(\n          (parserCommandOption) => parserCommandOption.flags === option.flags,\n        )\n      ) {\n        continue;\n      }\n\n      parserCommand.addOption(cloneOption(option));\n    }\n\n    parserCommand.hook(\"preSubcommand\", (thisCommand, actionCommand) => {\n      for (const cmd of [thisCommand, actionCommand]) {\n        const originalCommand = getOrThrow(commandsMap, cmd);\n        providedOptions.set(originalCommand, cmd.opts());\n\n        for (const optionKey of Object.keys(cmd.opts())) {\n          setProvidedOptionSource(\n            originalCommand,\n            optionKey,\n            cmd.getOptionValueSource(optionKey),\n          );\n        }\n      }\n    });\n\n    parserCommand.action(() => {\n      const originalCommand = getOrThrow(commandsMap, parserCommand);\n      providedOptions.set(originalCommand, parserCommand.opts());\n\n      for (const optionKey of Object.keys(parserCommand.opts())) {\n        setProvidedOptionSource(\n          originalCommand,\n          optionKey,\n          parserCommand.getOptionValueSource(optionKey),\n        );\n      }\n\n      matchedCommand = command;\n    });\n\n    for (const subcommand of command.commands as Command[]) {\n      const parserSubcommand = parserCommand.command(subcommand.name());\n      createParserCommand(parserSubcommand, subcommand);\n    }\n\n    return parserCommand;\n  };\n\n  const parserCommand = createParserCommand(new Command(), command);\n  parserCommand.parse(argv, options);\n\n  const missingOptions = matchedCommand\n    ? findMissingOptions(matchedCommand, providedOptions)\n    : new Map<Command, Set<string>>();\n\n  return {\n    matchedCommand,\n    missingOptions,\n    providedOptions,\n    providedOptionsSources,\n  };\n};\n",
    "export const noop = () => {};\n"
  ],
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