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Sed: replace multiline

I am trying to do a multi-line replacement using sed on OSX (zsh). My input file (Unity Asset file) looks like this:

...
displaySetting: 0
 applicationIdentifier:
  Android: com.appid.name
  Standalone: com.appid.name
  Tizen: com.appid.name
  iOS: com.appid.name
  tvOS: com.appid.name
buildNumber:
 iOS: 190
someOtherID: 190
moreIDsOverHere: 978987
...

I want to replace

buildNumber:
 iOS: 190

from

buildNumber:
 iOS: myBuildNumber

using the following command:

sed "N;s/^\\(.*buildNumber:.*.*$^.*iOS: \\)[0-9]*.*$/\\1myBuildNumber/;P;D" file.asset

This works except it also deletes the last line. I suspect it has something to do with my use of the stencil buffer, but I can't seem to find a solution.

Help would be greatly appreciated!

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2 answers


You don't need to use hold here. Try the following:

sed "/^[[:space:]]*buildNumber/{n;s/\(iOS: \)[0-9]*/\1myBuildNumber/;}" file

When buildNumber

found, n

reads the next line and searches iOS:

, followed by numbers. If found, the template is replaced with iOS

(using the backlink) and then myBuildNumber

.



Edit:

To edit the file under OSX, add the flag -i

:

sed -i '' "/^[[:space:]]*buildNumber/{n;s/\(iOS: \)[0-9]*/\1myBuildNumber/;}" file
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Better to use awk for multi-line editing of records like:



awk '/buildNumber:/{p=NR} NR==p+1 && /iOS: [0-9]+/{sub(/iOS.*/, "iOS: myBuildNumber")} 1' file

dsplaySetting: 0
 applicationIdentifier:
  Android: com.appid.name
  Standalone: com.appid.name
  Tizen: com.appid.name
  iOS: com.appid.name
  tvOS: com.appid.name
buildNumber:
  iOS: myBuildNumber
someOtherID: 190
moreIDsOverHere: 978987
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