Using sed to add a line after a specific string, can't make it work for strings involving ' ( / etc

Question

Im trying to use sed to add a line after a specific string in a file. Can anyone help?

File name:

example.js

Existing line:

localeData: require('react-intl/locale-data/en'),

Desired output:

localeData: require('react-intl/locale-data/en'),
messages: require('../locale/messages_en'),

UPDATE: Some progress, this command replaces the string being searched with the string I want appended.I don't want it replaced:

sed 's/react-intl\/locale-data\/en/..\/locale\/messages_en/g' example.js

updated @anubhava no not limited to using sed, any command that required no manual intervention (this is part of a script). Sed is just the overwhelming majority of results when searching 'how to add a line after a specific string in a file' — Jay.F, Sep 10 '20 at 17:29
Does this answer your question? [Insert line after first match using sed](https://stackoverflow.com/questions/15559359/insert-line-after-first-match-using-sed) — thanasisp, Sep 10 '20 at 18:50

score 2 · Accepted Answer · answered Sep 10 '20 at 17:34

2

You may use this non-regex way using awk:

awk -v s="localeData: require('react-intl/locale-data/en')," \
    -v r="messages: require('../locale/messages_en')," '
1
index($0, s) {
   print r
}' file

answered Sep 10 '20 at 17:34

anubhava

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score 0 · Answer 2 · answered Sep 10 '20 at 18:40

Use a operator to insert a line after a matched line in sed:

sed '/react-intl\/locale-data\/en/a messages:   require('..\/locale\/messages_en'),' example.js

react-intl\/locale-data\/en matches a line with react-intl/locale-data/en string in it, and a messages: require('..\/locale\/messages_en'), inserts messages: require('../locale/messages_en'), right below.

Using sed to add a line after a specific string, can't make it work for strings involving ' ( / etc

2 Answers2