forked from extern/nushell
63 lines
1.7 KiB
Markdown
63 lines
1.7 KiB
Markdown
# alias
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This command allows you to define shortcuts for other common commands.
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The command expects three parameters:
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* the name of alias
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* the parameters as a space-separated list (`[a b ...]`), can be empty (`[]`)
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* the body of the alias as a `{...}` block
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## Examples
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Define a custom `myecho` command as an alias:
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```shell
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> alias myecho [msg] { echo $msg }
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> myecho "hello world"
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hello world
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```
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Since the parameters are well defined, calling the command with the wrong number of parameters will fail properly:
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```shell
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> myecho hello world
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error: myecho unexpected world
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- shell:1:18
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1 | myecho hello world
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| ^^^^^ unexpected argument (try myecho -h)
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```
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The suggested help command works!
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```shell
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> myecho -h
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Usage:
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> myecho ($msg) {flags}
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parameters:
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($msg)
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flags:
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-h, --help: Display this help message
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```
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## Persistent aliases
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Aliases are most useful when they are persistent. For that, add them to your startup config:
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```
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> config --set [startup ["alias myecho [msg] { echo $msg }"]]
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```
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This is fine for the first alias, but since it overwrites the startup config, you need a different approach for additional aliases.
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To add a 2nd alias:
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```
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config --get startup | append "alias s [] { git status -sb }" | config --set_into startup
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```
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This first reads the `startup` config (a table of strings), then appends another alias, then sets the `startup` config with the output of the pipeline.
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To make this process easier, you could define another alias:
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```
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> alias addalias [alias-string] { config --get startup | append $alias-string | config --set_into startup }
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```
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Then use that to add more aliases:
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```
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addalias "alias s [] { git status -sb }"
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```
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