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cli: clarify spec

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Simon Michael 2014-04-27 23:33:13 -07:00
parent f3c90a1351
commit dbd35fbe3e
1 changed files with 27 additions and 26 deletions
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53
tests/command-line.test
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@ -2,38 +2,39 @@
#
# Quick guide to terms used here:
#
# - flag: generally a synonym for option. Or sometimes, just the first
# part of an option: a hyphen followed by a letter (short flag) or a
# word (long flag).
# - flag: a synonym for option. Or, just the first part of an option,
# which can be either a short flag (hyphen followed by a letter) or
# a long flag (double hyphen followed by a word).
#
# - option: a command modifier. An option consists of a short flag, a
# long flag, or both, and possibly an optional or required value.
# Each option has some effect on program execution, and is described
# in the command line help.
#
# - argument:
# - raw command line arguments: everything following the program
# name on the command line, ie what is returned by getArgs
# - parsed arguments: all raw command line arguments that are not
# options (flags or values).
# - (sub)command arguments: all parsed arguments except the first
# (which is the subcommand's name)
# - raw arguments: everything following the program name on the
# command line, ie what is returned by getArgs.
#
# - RawOpts: the command, options and arguments as parsed by cmdargs,
# as an assocation list. Eg:
# - parsed arguments: all raw arguments that are not options.
#
# - command arguments: all parsed arguments after the first, which is
# the command name.
#
# - RawOpts: the command name, options, and arguments parsed by cmdargs,
# as an assocation list of strings. Eg:
# [("command","register"),("args","a"),("debug",""),("help","")]
#
# - CliOpts: the command, options and arguments from cmdargs, plus
# additional cleanup, in a more convenient data structure used
# throughout the hledger CLI code.
# - CliOpts: a RawOpts, plus the same information with some additional
# cleanup in a more convenient data structure. Used throughout the
# hledger CLI code.
#
# - command:
# - command line, shell command: what you type in the shell/terminal window to start a program
# - hledger command, subcommand: one of hledger's several modes of operation,
# usually selected by the first command-line argument that isn't an option.
# Commands are listed in the general command line help. There are two kinds:
# - internal commands: built in to the main hledger executable
# - external commands, or add-ons: any other hledger-* executables in the users's PATH
# - command line, shell command: what you type in the shell or
# terminal window to start a program.
#
# - hledger command, subcommand: one of hledger's modes of operation,
# named and selected by the first parsed argument. There are two kinds:
# - internal or built-in commands are part of the main hledger executable.
# - external or add-on commands are provided by hledger-* executables in
# the PATH.
#
# Description of existing/expected behaviour as of 2013/9/16:
#
@ -42,8 +43,8 @@
# - commands are internal (built in to the main hledger executable) or external (any hledger-* executables found in the PATH)
# - some internal commands have aliases, which are displayed in the general help
# - there are also a few hidden internal commands
# - COMMAND is an exact command or alias name, or any unique prefix of one (eg reg for register)
# - when COMMAND is a non-unique prefix, matching commands will be listed, including hidden ones (eg hledger c)
# - COMMAND is an exact command (balance), an alias (bal), or any unique command prefix (inc)
# - when COMMAND is a non-unique prefix, all matched commands will be listed, including hidden ones (eg hledger c)
# - an unrecognised command shows an error and gives non-zero exit status
#
# - usually the command must come first, followed by options and arguments in any order
@ -52,9 +53,9 @@
# - if the command is external, options and arguments after the command are handled by that executable, not hledger
#
# - the --help flag has highest priority
# - --help before the command, or no command, shows general help, including available commands
# - --help before the command (or no command) shows general help, including the commands list
# - --help after an internal command shows command-specific help, including command and general flags
# - there is no built-in "help" command
# - there is no internal "help" command
# version