termtest

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Published: May 5, 2023 License: Apache-2.0 Imports: 3 Imported by: 0

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Functions

func StripANSICommands

func StripANSICommands(s string, opts ...ansiterm.Option) (string, error)

StripANSICommands attempts to strip ANSI console escape and control sequences from s, returning a string containing only the final printed characters which would be visible onscreen if the string was to be processed by a terminal emulator. Basic cursor positioning and screen erase control sequences are parsed and processed such that the output of simple CLI commands passed through a Windows Pseudoterminal and then this function yields the same string as if the output of those commands was redirected to a file.

The only correct way to represent the result of processing ANSI console output would be a two-dimensional array of an emulated terminal's display buffer. That would be awkward to test against, so this function instead attempts to render to a one-dimensional string without extra padding. This is an inherently lossy process, and any attempts to render a string containing many cursor positioning commands are unlikely to yield satisfactory results. Handlers for several ANSI control sequences are also unimplemented; attempts to parse a string containing one will panic.

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