Fix history command error when input starts with dash

[Copilot]

Bash's history -s command interprets strings starting with - as options rather than arguments, causing errors when users enter expressions like -1 or --help in the shell REPL.

Changes

• src/WP_CLI/Shell/REPL.php: Added -- separator to history -s command to mark end of options
• features/shell.feature: Added test case for dash-prefixed input

Technical Details

# Before (line 140)
'history -s "$LINE"; '

# After
'history -s -- "$LINE"; '

The -- separator is the POSIX standard way to prevent option parsing of arguments.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

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Original prompt

---

This section details on the original issue you should resolve

<issue_title>When input prompt starts with '-': /bin/bash: line 1: history: -1: invalid option</issue_title>
<issue_description>## Bug Report

• Yes, I reviewed the contribution guidelines.
• Yes, more specifically, I reviewed the guidelines on how to write clear bug reports.

Describe the current, buggy behavior

Type something that starts with -, i.e. -1:

wp> -1
/bin/bash: line 1: history: -1: invalid option
history: usage: history [-c] [-d offset] [n] or history -anrw [filename] or history -ps arg [arg...]
=> int(-1)

Describe how other contributors can replicate this bug

$ wp shell
wp> -1
/bin/bash: line 1: history: -1: invalid option
history: usage: history [-c] [-d offset] [n] or history -anrw [filename] or history -ps arg [arg...]
=> int(-1)

Describe what you would expect as the correct outcome

If it's negative number in PHP, it should evaluate to negative number:

wp> -1
=> int(-1)

Let us know what environment you are running this on

OS:	Linux 5.10.0-31-amd64 wp-cli/shell-command#1 SMP Debian 5.10.221-1 (2024-07-14) x86_64
Shell:	/bin/bash
PHP binary:	/usr/local/php8.3/bin/php
PHP version:	8.3.24
php.ini used:	/usr/local/php8.3/conf/php.ini
MySQL binary:	/usr/bin/mariadb
MySQL version:	mariadb  Ver 15.1 Distrib 10.5.29-MariaDB, for debian-linux-gnu (x86_64) using  EditLine wrapper
SQL modes:	ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION
WP-CLI root dir:	phar://wp-cli.phar/vendor/wp-cli/wp-cli
WP-CLI vendor dir:	phar://wp-cli.phar/vendor
WP_CLI phar path:	phar:///usr/local/bin/wp
WP-CLI packages dir:
WP-CLI cache dir:	/root/.wp-cli/cache
WP-CLI global config:	/chroot/var/www/config/wp-cli.yml
WP-CLI project config:
WP-CLI version:	2.12.0

Provide a possible solution

Likely the input prompt in https://github.com/wp-cli/shell-command/blob/main/src/WP_CLI/Shell/REPL.php#L135-L144 need to be escaped?

Just leave this section out if you don't know how to fix it.

Provide additional context/Screenshots

Add any other context about the problem here.

If applicable, add screenshots to help explain (you can just drag&drop images into the Github issue).
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes When input prompt starts with '-': /bin/bash: line 1: history: -1: invalid option #75

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✅ All modified and coverable lines are covered by tests.

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[Copilot]

Pull request overview

This PR fixes a bug where the shell REPL throws an error when users input expressions starting with a dash (e.g., -1, --help). The issue occurred because bash's history -s command interprets strings starting with - as options rather than arguments.

Changes:

• Added -- separator to history -s command in REPL.php to mark end of options
• Added test case to verify dash-prefixed input works correctly

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/WP_CLI/Shell/REPL.php	Fixed history -s command by adding -- separator to prevent option parsing
features/shell.feature	Added test scenario to verify input starting with dash works correctly

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