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fish_for_bash_users: Put explanation on subshells first

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and *then* explain things that aren't subshells.
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Fabian Boehm 2024-05-15 22:44:07 +02:00
parent b6bebec513
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doc_src/fish_for_bash_users.rst
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@ -417,6 +417,8 @@ This includes things like:
baz & baz &
done done
Fish does not currently have subshells. You will have to find a different solution. The isolation can usually be achieved by just scoping variables (with ``set -l``), but if you really do need to run your code in a new shell environment you can use ``fish -c 'your code here'`` to do so explicitly.
``()`` subshells are often confused with ``{}`` grouping, which does *not* use a subshell. When you just need to group, you can use ``begin; end`` in fish:: ``()`` subshells are often confused with ``{}`` grouping, which does *not* use a subshell. When you just need to group, you can use ``begin; end`` in fish::
(foo; bar) | baz (foo; bar) | baz
@ -437,8 +439,6 @@ The pipe will simply be run in the same process, so ``while read`` loops can set
Subshells are also frequently confused with :ref:`command substitutions <bash-command-substitutions>`, which bash writes as ```command``` or ``$(command)`` and fish writes as ``$(command)`` or ``(command)``. Bash also *uses* subshells to implement them. Subshells are also frequently confused with :ref:`command substitutions <bash-command-substitutions>`, which bash writes as ```command``` or ``$(command)`` and fish writes as ``$(command)`` or ``(command)``. Bash also *uses* subshells to implement them.
The isolation can usually be achieved by just scoping variables (with ``set -l``), but if you really do need to run your code in a new shell environment you can always use ``fish -c 'your code here'`` to do so explicitly.
Builtins and other commands Builtins and other commands
--------------------------- ---------------------------