mirror of
https://github.com/nushell/nushell
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105 lines
3.7 KiB
Markdown
105 lines
3.7 KiB
Markdown
# which
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Finds a program file.
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Usage:
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> which <application> {flags}
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## Parameters
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- application: the name of the command to find the path to
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## Flags
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- --all: list all executables
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## Examples
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`which` finds the location of an executable:
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```shell
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> which python
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─────────┬─────────────────
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arg │ python
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path │ /usr/bin/python
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builtin │ false
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─────────┴─────────────────
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```
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```shell
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> which cargo
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─────────┬────────────────────────────
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arg │ cargo
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path │ /home/bob/.cargo/bin/cargo
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builtin │ false
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─────────┴────────────────────────────
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```
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`which` will identify nushell commands:
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```shell
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> which ls
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─────────┬──────────────────────────
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arg │ ls
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path │ nushell built-in command
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builtin │ true
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─────────┴──────────────────────────
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```
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```shell
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> which which
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─────────┬──────────────────────────
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arg │ which
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path │ nushell built-in command
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builtin │ true
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─────────┴──────────────────────────
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```
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Passing the `all` flag identifies all instances of a command or binary
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```shell
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> which ls --all
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───┬─────┬──────────────────────────┬─────────
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# │ arg │ path │ builtin
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───┼─────┼──────────────────────────┼─────────
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0 │ ls │ nushell built-in command │ true
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1 │ ls │ /bin/ls │ false
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───┴─────┴──────────────────────────┴─────────
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```
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`which` will also identify local binaries
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```shell
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> touch foo
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> chmod +x foo
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> which ./foo
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─────────┬────────────────────────────────
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arg │ ./foo
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path │ /Users/josephlyons/Desktop/foo
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builtin │ false
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─────────┴────────────────────────────────
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```
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`which` also identifies aliases
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```shell
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> alias e = echo
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> which e
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───┬─────┬───────────────┬─────────
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# │ arg │ path │ builtin
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───┼─────┼───────────────┼─────────
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0 │ e │ Nushell alias │ false
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───┴─────┴───────────────┴─────────
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```
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and custom commands
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```shell
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> def my_cool_echo [arg] { echo $arg }
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> which my_cool_echo
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───┬──────────────┬────────────────────────┬─────────
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# │ arg │ path │ builtin
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───┼──────────────┼────────────────────────┼─────────
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0 │ my_cool_echo │ Nushell custom command │ false
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───┴──────────────┴────────────────────────┴─────────
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```
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