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|
ask:
short: get user input
description: >
Gets a line of user input text with a prompt.
note: >
When a program is receiving input from a pipe or writing its
output to a pipe, this flag (which is enabled by default) forces the program
to write the prompt to `/dev/tty` and read the input from `/dev/tty`, which
circumvents the pipe. This means that `foo | ./tomo your-program | baz` will
still show a visible prompt and read user input, despite the pipes. Setting
this flag to `no` will mean that the prompt is written to `stdout` and input
is read from `stdin`, even if those are pipes.
return:
type: 'Text?'
description: >
A line of user input text without a trailing newline, or empty text if
something went wrong (e.g. the user hit `Ctrl-D`).
args:
prompt:
type: 'Text'
description: >
The text to print as a prompt before getting the input.
bold:
type: 'Bool'
default: 'yes'
description: >
Whether or not to print make the prompt appear bold on a console.
force_tty:
type: 'Bool'
default: 'yes'
description: >
Whether or not to force the use of /dev/tty.
example: |
assert ask("What's your name? ") == "Arthur Dent"
exit:
short: exit the program
description: >
Exits the program with a given status and optionally prints a message.
return:
type: 'Void'
description: >
This function never returns.
args:
message:
type: 'Text?'
default: 'none'
description: >
If nonempty, this message will be printed (with a newline) before
exiting.
status:
type: 'Int32'
default: 'Int32(1)'
description: >
The status code that the program with exit with.
example: |
exit(status=1, "Goodbye forever!")
getenv:
short: get an environment variable
description: >
Gets an environment variable.
return:
type: 'Text?'
description: >
If set, the environment variable's value, otherwise, `none`.
args:
name:
type: 'Text'
description: >
The name of the environment variable to get.
example: |
assert getenv("TERM") == "xterm-256color"
assert getenv("not_a_variable") == none
print:
short: print some text
description: >
Prints a message to the console (alias for say()).
return:
type: 'Void'
description: >
Nothing.
args:
text:
type: 'Text'
description: >
The text to print.
newline:
type: 'Bool'
default: 'yes'
description: >
Whether or not to print a newline after the text.
example: |
print("Hello ", newline=no)
print("world!")
say:
short: print some text
description: >
Prints a message to the console.
return:
type: 'Void'
description: >
Nothing.
args:
text:
type: 'Text'
description: >
The text to print.
newline:
type: 'Bool'
default: 'yes'
description: >
Whether or not to print a newline after the text.
example: |
say("Hello ", newline=no)
say("world!")
setenv:
short: set an environment variable
description: >
Sets an environment variable.
return:
type: 'Void'
description: >
Nothing.
args:
name:
type: 'Text'
description: >
The name of the environment variable to set.
value:
type: 'Text'
description: >
The new value of the environment variable.
example: |
setenv("FOOBAR", "xyz")
sleep:
short: wait for an interval
description: >
Pause execution for a given number of seconds.
return:
type: 'Void'
description: >
Nothing.
args:
seconds:
type: 'Num'
description: >
How many seconds to sleep for.
example: |
sleep(1.5)
fail:
short: abort the program
description: >
Prints a message to the console, aborts the program, and prints a stack trace.
return:
type: 'Abort'
description: >
Nothing, aborts the program.
args:
message:
type: 'Text'
description: >
The error message to print.
example: |
fail("Oh no!")
USE_COLOR:
short: whether to use colors
type: Bool
description: >
Whether or not the console prefers ANSI color escape sequences in the output.
|
