mirror of https://github.com/flokoe/bash-hackers-wiki.git synced 2024-11-01 23:03:05 +01:00

Hanson Char b75c3a588b Fix hyperlinks of markdown pages at depth 3

find docs/ -depth 3  -name '*.md' | xargs grep '(.*/' -l | \
  xargs -I{} \
  sed -i '' \
  -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../../\1/\2.md)%g' \
  -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([a-zA-Z_-][0-9a-zA-Z_-]*\))%(../../\1/\2.md#\3)%g' \
  -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../../\1/\2/\3.md)%g' \
  -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([a-zA-Z_-][0-9a-zA-Z_-]*\))%(../../\1/\2/\3.md#\4)%g' \
  -e 's%](\([^:.>)#][^:.>)#]*\))%](../../\1.md)%g' \
  -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../../\1.md#\2)%g' \
  {}

Related to https://github.com/flokoe/bash-hackers-wiki/issues/10

2024-01-28 17:26:57 -08:00

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Grouping commands in a subshell

Synopsis

( <LIST> )

Description

The list <LIST> is executed in a separate shell - a subprocess. No changes to the environment (variables etc...) are reflected in the "main shell".

Examples

Execute a command in a different directory.

echo "$PWD"
( cd /usr; echo "$PWD" )
echo "$PWD" # Still in the original directory.

Portability considerations

The subshell compound command is specified by POSIX.
Avoid ambiguous syntax.

(((1+1))) # Equivalent to: (( (1+1) ))

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