Overview

The mysql CLI depends on the --defaults-file=foo argument being the very first argument. This change provides a new 'PrependArgs' method and uses it for the mysql plugin.

From the mysql CLI help text:

The following groups are read: mysql client
The following options may be given as the first argument:
--print-defaults        Print the program argument list and exit.
--no-defaults           Don't read default options from any option file,
                        except for login file.
--defaults-file=#       Only read default options from the given file #.
--defaults-extra-file=# Read this file after the global files are read.
--defaults-group-suffix=#
                        Also read groups with concat(group, suffix)
--login-path=#          Read this path from the login file.

Type of change

• Created a new plugin
• Improved an existing plugin
• Fixed a bug in an existing plugin
• Improved contributor utilities or experience

Related Issue(s)

• Resolves: 1Password mysql shell plugin breaks additional CLI arguments #406

How To Test

Build the plugin locally and run op plugin run mysql -- --host=foo using a credential with no host field. Before this PR, it results in the error: mysql: [ERROR] unknown variable 'defaults-file=... because the MySQL treats unknown arguments in the form --variable-name=foo as MySQL configuration variable. After the PR, additional command-line arguments are appended after --defaults-file that is injected by the mysql plugin.

Changelog

• The mysql CLI depends on the --defaults-file=foo argument being the very first argument