localheropro/mattermost-plugin-autolink

Automatically rewrite text matching a regular expression into a markdown link.

Autolink Plugin

This plugin creates regular expression (regexp) patterns that are reformatted into a Markdown link before the message is saved into the database.

Use it to add custom auto-linking on your Mattermost system, such as adding links to your issue tracker based on the regexp patterns.

Posting a message containing a Jira issue key..

..automatically links to the corresponding issue in the Jira project

Configuration

1. Go to System Console > Plugins > Management and click Enable to enable the Autolink plugin.

   • If you are running Mattermost v5.11 or earlier, you must first go to the releases page of this GitHub repository, download the latest release, and upload it to your Mattermost instance following this documentation.

2. Modify your config.json file to include the types of regexp patterns you wish to match, under the PluginSettings. See below for an example of what this should look like.

Usage

Autolinks have 2 parts: a Pattern which is a regular expression search pattern utilizing the Golang regexp library, and a Template that gets expanded. You can create variables in the pattern with the syntax (?P<name>...) which will then be expanded by the corresponding template.

In the template, a variable is denoted by a substring of the form $name or ${name}, where name is a non-empty sequence of letters, digits, and underscores. A purely numeric name like $1 refers to the submatch with the corresponding index. In the $name form, name is taken to be as long as possible: $1x is equivalent to ${1x}, not ${1}x, and, $10 is equivalent to ${10}, not ${1}0. To insert a literal $ in the output, use $$ in the template.

Below is an example of regexp patterns used for autolinking at https://community.mattermost.com, modified in the config.json file:

"PluginSettings": {
    ...
    "Plugins": {
        "mattermost-autolink": {
            "links": [
                {
                    "Pattern": "(LHS)",
                    "Template": "[LHS](https://docs.mattermost.com/process/training.html#lhs)",
                    "Scope": ["team/off-topic"]
                },
                {
                    "Pattern": "(RHS)",
                    "Template": "[RHS](https://docs.mattermost.com/process/training.html#rhs)",
                    "Scope": ["team/town-square"]
                },
                {
                    "Pattern": "(?i)(Mana)",
                    "Template": "[Mana](https://docs.mattermost.com/process/training.html#mana)"
                },
                {
                    "Pattern": "(?i)(ESR)",
                    "Template": "[ESR](https://docs.mattermost.com/process/training.html#esr)"
                },
                {
                    "Pattern": "((?P<level>0|1|2|3|4|5)/5)",
                    "Template": "[${level}/5](https://docs.mattermost.com/process/training.html#id8)"
                },
                {
                    "Pattern": "(MM)(-)(?P<jira_id>\\d+)",
                    "Template": "[MM-${jira_id}](https://mattermost.atlassian.net/browse/MM-${jira_id})"
                },
                {
                    "Pattern": "https://pre-release\\.mattermost\\.com/core/pl/(?P<id>[a-zA-Z0-9]+)",
                    "Template": "[<jump to convo>](https://pre-release.mattermost.com/core/pl/${id})"
                },
                {
                    "Pattern": "(https://mattermost\\.atlassian\\.net/browse/)(MM)(-)(?P<jira_id>\\d+)",
                    "Template": "[MM-${jira_id}](https://mattermost.atlassian.net/browse/MM-${jira_id})"
                },
                {
                    "Pattern": "https://github\\.com/mattermost/(?P<repo>.+)/pull/(?P<id>\\d+)",
                    "Template": "[pr-${repo}-${id}](https://github.com/mattermost/${repo}/pull/${id})"
                },
                {
                    "Pattern": "https://github\\.com/mattermost/(?P<repo>.+)/issues/(?P<id>\\d+)",
                    "Template": "[issue-${repo}-${id}](https://github.com/mattermost/${repo}/issues/${id})"
                },
                {
                    "Pattern": "(PLT)(-)(?P<jira_id>\\d+)",
                    "Template": "[PLT-${jira_id}](https://mattermost.atlassian.net/browse/PLT-${jira_id})"
                },
                {
                    "Pattern": "(https://mattermost\\.atlassian\\.net/browse/)(PLT)(-)(?P<jira_id>\\d+)",
                    "Template": "[PLT-${jira_id}](https://mattermost.atlassian.net/browse/PLT-${jira_id})"
                }
            ]
        },
    },
    ...
    "PluginStates": {
        ...
        "mattermost-autolink": {
            "Enable": true
        },
        ...
    }
},

Examples

1. Autolinking Ticket ####:text with alphanumberic characters and spaces to a ticket link. Use:

• Pattern: (?i)(ticket )(?P<ticket_id>.+)(:)(?P<ticket_info>.*), or if the ticket_id is a number, then (?i)(ticket )(?P<ticket_id>\d+)(:)(?P<ticket_info>.*)
• Template: [Ticket ${ticket_id}: ${ticket_info}](https://github.com/mattermost/mattermost-server/issues/${ticket_id})

2. Autolinking a link to a GitHub PR to a format "pr-repo-id". Use:

• Pattern: https://github\\.com/mattermost/(?P<repo>.+)/pull/(?P<id>\\d+)
• Template: [pr-${repo}-${id}](https://github.com/mattermost/${repo}/pull/${id})

3. Using autolinking to create group mentions. Use (note that clicking the resulting at-mention redirects to a broken page):

• Pattern: @customgroup*
• Template: [@customgroup]( \\* @user1 @user2 @user3 \\* )

4. For servers with multiple domains (like community and community-daily on the public Mattermost Server), a substitution of absolute conversation links to relative links is recommended to prevent issues in the mobile app. Add one pattern for each domain used:

• Pattern: https://community\\.mattermost\\.com/(?P\u003cteamname\u003e(?a-zA-Z0-9]+)/(?P\u003cid\u003e[a-zA-Z0-9]+)
• Template: [<jump to convo>](/${teamname}/pl/${id})/${id})

Development

This plugin contains a server portion.

Use make dist to build distributions of the plugin that you can upload to a Mattermost server. Use make check-style to check the style. Use make deploy to deploy the plugin to your local server.

For additional information on developing plugins, refer to our plugin developer documentation.