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authorJohannes Stoelp <johannes.stoelp@gmail.com>2024-05-01 14:57:52 +0200
committerJohannes Stoelp <johannes.stoelp@gmail.com>2024-05-01 14:57:52 +0200
commitb737cc8ca5bb8ca5e07cd0151d678a7b4b10d5cb (patch)
tree86814d8fb3557ea2cbf73892dd0ec4e590e854de /src/tools/sed.md
parent50e07a8bca68d2f568df44166fa94383141c2696 (diff)
downloadnotes-b737cc8ca5bb8ca5e07cd0151d678a7b4b10d5cb.tar.gz
notes-b737cc8ca5bb8ca5e07cd0151d678a7b4b10d5cb.zip
cli: add new group for cli foo tools
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-# sed(1)
-
-```
-sed [opts] [script] [file]
- opts:
- -i edit file in place
- -i.bk edit file in place and create backup file
- (with .bk suffix, can be specified differently)
- --follow-symlinks
- follow symlinks when editing in place
- -e SCRIPT add SCRIPT to commands to be executed
- (can be specified multiple times)
- -f FILE add content of FILE to command to be executed
-
- --debug annotate program execution
-```
-
-## Examples
-### Delete lines
-```sh
-# Delete two lines.
-echo -e 'aa\nbb\ncc\ndd' | sed '1d;3d'
-# bb
-# dd
-
-# Delete last ($) line.
-echo -e 'aa\nbb\ncc\ndd' | sed '$d'
-# aa
-# bb
-# cc
-
-# Delete range of lines.
-echo -e 'aa\nbb\ncc\ndd' | sed '1,3d'
-# dd
-
-# Delete lines matching pattern.
-echo -e 'aa\nbb\ncc\ndd' | sed '/bb/d'
-# aa
-# cc
-# dd
-
-# Delete lines NOT matching pattern.
-echo -e 'aa\nbb\ncc\ndd' | sed '/bb/!d'
-# bb
-```
-
-### Insert lines
-```sh
-# Insert before line.
-echo -e 'aa\nbb' | sed '2iABC'
-# aa
-# ABC
-# bb
-
-# Insert after line.
-echo -e 'aa\nbb' | sed '2aABC'
-# aa
-# bb
-# ABC
-
-# Replace line.
-echo -e 'aa\nbb' | sed '2cABC'
-# aa
-# ABC
-
-# Insert before pattern match.
-echo -e 'aa\nbb' | sed '/bb/i 123'
-# aa
-# 123
-# bb
-```
-
-### Substitute lines
-```sh
-# Substitute by regex.
-echo -e 'aafooaa\ncc' | sed 's/foo/MOOSE/'
-# aaMOOSEaa
-# cc
-```
-
-### Multiple scripts
-```sh
-echo -e 'foo\nbar' | sed -e 's/foo/FOO/' -e 's/FOO/BAR/'
-# BAR
-# bar
-```
-
-### Edit inplace through symlink
-```sh
-touch file
-ln -s file link
-ls -l link
-# lrwxrwxrwx 1 johannst johannst 4 Feb 7 23:02 link -> file
-
-sed -i --follow-symlinks '1iabc' link
-ls -l link
-# lrwxrwxrwx 1 johannst johannst 4 Feb 7 23:02 link -> file
-
-sed -i '1iabc' link
-ls -l link
-# -rw-r--r-- 1 johannst johannst 0 Feb 7 23:02 link
-```