Module InferBase__CommandLineOption

Print to stderr in case of error, fails in strict mode

mk_set variable value defines a command line option which sets variable to value.

mk_bool long short doc defines a bool ref set by the command line flag --long (and -s), and cleared by the flag --no-long (and -S). If long already has a "no-" prefix, or s is capital, then the existing prefixes will instead be removed. The default value is false unless overridden by ~default:true. The doc string will be prefixed with either "Activates:" or "Deactivates:", so should be phrased accordingly.

mk_bool_group children not_children behaves as mk_bool with the addition that all the children are also set and the no_children are unset. A child can be unset by including "--no-child" later in the arguments.

An option "--long-reset" is automatically created that resets the reference to None when found on the command line, unless mk_reset is false.

mk_string_list defines a string list ref, initialized to [] unless overridden by ~default. Each argument of an occurrence of the option will be prepended to the list, so the final value will be in the reverse order they appeared on the command line.

An option "--long-reset" is automatically created that resets the list to when found on the command line.

like mk_string but will resolve the string into an absolute path so that children processes agree on the absolute path that the option represents

analogous of mk_string_opt with the extra feature of mk_path

analogous of mk_string_list with the extra feature of mk_path

mk_symbol long symbols defines a command line flag --long <symbol> where (<symbol>,_) is an element of symbols.

mk_symbol_opt is similar to mk_symbol but defaults to None. If mk_reset is false then do not create an additional --long-reset option to reset the value of the option to None.

mk_symbol_seq long symbols defines a command line flag --long <symbol sequence> where <symbol sequence> is a comma-separated sequence of <symbol>s such that (<symbol>,_) is an element of symbols.

mk_anon () defines a string list ref of the anonymous command line arguments, in the reverse order they appeared on the command line.

mk_rest_actions doc ~usage command_to_parse_mode defines a string list ref of the command line arguments following "--", in the reverse order they appeared on the command line. usage is the usage message in case of parse errors or if --help is passed. For example, calling mk_action and parsing exe -opt1 -opt2 -- arg1 arg2 will result in the returned ref containing arg2; arg1. Additionally, the first arg following "--" is passed to command_to_parse_mode to obtain the parse action that will be used to parse the remaining arguments.

mk_command_doc ~title ~section ~version ~short_description ~synopsis ~description ~see_also command_exe records information about a command that is used to create its man page. A lot of the concepts are taken from man-pages(7).

• command_exe is the name of the command, preferably an executable that selects the command
• title will be the title of the manual
• section will be the section of the manual (the number 7 in man-pages(7))
• version is the version string of the command
• date is the date of the last modification of the manual
• short_description is a one-line description of the command
• options can be either `Replace blocks, which populates the OPTIONS section with blocks, or `Prepend blocks, in which case the options from the command are used, prepended by blocks. If unspecified it defaults to `Prepend [].
• All the other section_name options correspond to the contents of the section section_name. Some are mandatory and some are not.

mk_subcommand command ~long command_doc defines the subcommand command. A subcommand is activated by passing name, and by passing --deprecated_long if specified. A man page is automatically generated for command based on the information in command_doc, if available (otherwise the command is considered internal). on_unknown_arg is the action taken on unknown anonymous arguments; it is `Reject by default.

environment variable use to pass arguments from parent to child processes

separator of argv elements when encoded into environment variables

extend_env_args args appends args to those passed via args_env_var

parse ~usage parse_mode command parses command line arguments as specified by preceding calls to the mk_* functions, and returns:

• the command selected by the user on the command line, except if command is not None in which case it is considered "pre-selected" for the user;
• a function that prints the usage message and help text then exits with the code passed as argument.

The decoded values of the inferconfig file config_file, if provided, are parsed, followed by the decoded values of the environment variable args_env_var, followed by Sys.argv if parse_mode is one that should parse command line arguments (this is defined in the implementation of this module). Therefore arguments passed on the command line supersede those specified in the environment variable, which themselves supersede those passed via the config file.

WARNING: An argument will be interpreted as many times as it appears in all of the config file, the environment variable, and the command line. The args_env_var is set to the set of options parsed in args_env_var and on the command line.

is_env_var_set var is true if $var=1

Display the manual of command to the user, or command_doc if command is None. format is used as for Cmdliner.Manpage.print. If internal_section is specified, add a section titled internal_section about internal (hidden) options.