slides.md

Agenda

My favourite sed tricks

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Search and replace

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Search and replace - one

$ echo orange orange orange | sed s/orange/apple/

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Search and replace - all

$ echo orange orange orange | sed s/orange/apple/g

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Search (no replace)

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Search (no replace)

grep = g/re/p

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Search (no replace)

$ cat pom.xml | sed -n /important/p
$ cat pom.xml | sed -n /important/Ip

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More advanced search and replace

$ cat pom.xml | sed -rn 's#<artifactId>(.*)</artifactId>#\1#p'

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Even more advanced search and replace

Working on blocks of text

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Even more advanced search and replace

cat pom.xml | sed -nr '/<plugin>/,/<\/plugin>/{
  s#<version>(.*)</version>#\1#p
}'

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If your sed starts growing

#! /bin/sed -rnf

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$ cat pom.xml | ./version.sed

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Summary

• Search and replace
• Great for searching too
• Line based
• Can work on blocks too

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Delve further

• GNU sed manual
• Handy one liners