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0bb368d550
Add example of only defining functions if the supporting program is present. Signed-off-by: Joe Block <jpb@unixorn.net>
38 lines
3.9 KiB
Markdown
38 lines
3.9 KiB
Markdown
# Writing Plugins and Themes
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Here are some suggestions to make installing and using your plugin/theme as simple as possible for end users, no matter what ZSH framework (if any) they are using.
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1. Make using your plugin easier for end users and put the plugin file at the root level of your plugin repository instead of hiding it in a subdirectory. This allows [oh-my-zsh](https://github.com/robbyrussell/oh-my-zsh) users to install it with a simple `git clone git@github.com:you/yourplugin.git` in their `custom/plugins` directory and also lets [Antigen](https://github.com/zsh-users/antigen) and [zgenom](https://github.com/jandamm/zgenom) users let the framework automatically clone the repository without having to specify a subdirectory path.
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2. Only put one plugin or theme in a repository. This makes using it a simple `git clone` for [oh-my-zsh](https://github.com/robbyrussell/oh-my-zsh) users, and simpler for other framework users as well - they won't have to specify a subdirectory, just username/reponame.
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3. Only oh-my-zsh sets the `${ZSH_CUSTOM}` variable. Relying on your plugin being in `${ZSH_CUSTOM}/yourPluginName` will make your plugin not work with anything but oh-my-zsh. `$(dirname $0)` will tell you what directory your plugin is actually installed in, is cross-framework and won't break when a user inevitably renames your plugin directory.
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4. Don't assume your plugin will be checked out into a directory with the same name you gave the plugin. This is another case where `$(dirname ${0})` will work and `${ZSH_CUSTOM}/hardcoded-directory-name` will fail miserably.
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5. Use `yourplugin.plugin.zsh` for the main plugin file. This is what [oh-my-zsh](https://github.com/robbyrussell/oh-my-zsh) looks for. [Antigen](https://github.com/zsh-users/antigen), [zgenom](https://github.com/jandamm/zgenom) and most other ZSH frameworks will also automatically find and load that filename.
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6. If you’re making a theme, include a screenshot so prospective users can see what it looks like without having to install it. If it relies on Powerline-compatible fonts or Nerdfonts, put that in the readme.
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7. If your plugin adds any of its subdirectories to the user's `fpath`, make sure those subdirectories only contain function definition files. This allows for frameworks to correctly [zcompile all functions](http://zsh.sourceforge.net/Doc/Release/Functions.html#Autoloading-Functions). Please don't make your plugin add its root directory to the `fpath` - this will cause problems with `zcompile`.
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8. If your plugin adds aliases or functions that rely on a given program to be installed, check for the program and only add them when it's present. Same if it only works on one OS - check for the OS first. Example:
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```sh
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function has_command() {
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which "$@" > /dev/null 2>&1
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}
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if has_command pbcopy; then
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# On macOS, make ^Y yank the selection to the system clipboard. On Linux you can alias pbcopy to `xclip -selection clipboard` or corresponding tool.
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fzf_default_opts+=("--bind 'ctrl-y:execute-silent(echo {+} | pbcopy)'")
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fi
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```
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9. Leave ZSH settings alone.
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- If you're using `setopt` to override the user's existing settings, you _will_ break someone's workflow. If you feel you absolutely must tweak `setopt` settings, make sure there's an easy way to disable your overrides - consider looking for a file named `~/.YOURPLUGIN_disable_SETTINGSNAME`.
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- If you're touching the magic ZSH settings variables like `HISTSIZE`, _only do it if the variable is unset_. Wrap it in a `if [[ -z "$VARNAME" ]]; then` block so you don't step on a user's existing settings.
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10. Don't forget to add a license. A lot of people won't use anything that doesn't have a license. [choosealicense.com](https://choosealicense.com) is a good tool to help you pick one if you don't already have something specific in mind.
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11. Submit a PR or add an issue here at [awesome-zsh-plugins](https://github.com/unixorn/awesome-zsh-plugins) so your plugin is easy for users to find :-)
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