file_replace_lines

Ensure that a line in a file is replaced by another one.

⚙️ Compatible targets: Linux

Parameters

Name	Documentation
path	File name to edit (absolute path on the target node). This parameter is required.
line	Line to match in the file. This parameter is required.
replacement	Line to add in the file as a replacement. This parameter is required.

Outcome conditions

You need to replace ${path} with its actual canonified value.

✅ Ok: file_replace_lines_${path}_ok
- ☑️ Already compliant: file_replace_lines_${path}_kept
- 🟨 Repaired: file_replace_lines_${path}_repaired
❌ Error: file_replace_lines_${path}_error

Example

method: file_replace_lines
params:
  replacement: VALUE
  path: VALUE
  line: VALUE

Documentation

You can replace lines in a files, based on regular expression and captured pattern

Syntax

The content to match in the file is a PCRE regular expression, unanchored that you can replace with the content of replacement.

Content can be captured in regular expression, and be reused with the notation ${match.1} (for first matched content), ${match.2} for second, etc, and the special captured group ${match.0} for the whole text.

This regular expression must not match the string used as a replacement. For example, to set kernel.shmmax=5678, the regular expression would be kernel.shmmax=(?!5678$).* and the string used as replacement kernel.shmmax=5678 Note that if you want to replace a key-value line, method File key-value present is more suited.

Example

Here is an example to remove enclosing specific tags

file_replace_lines("/PATH_TO_MY_FILE/file", "<my>(.*)<pattern>", "my ${match.1} pattern")