Set key with value on a line in a file, if not exists between specific lines, or set specific value

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                          Given the following configuration file:

        shape {
            visible: true
            type: rectangle
            ...
        }
        
        shape {
            type: circle
            visible: isRound === "true"
            ...
        }
        
        shape {
            // comment: "visible" not set, default "true" 
        }

How to set using bash all the values for visible key (property) to false, without touching the comments, but keeping the old value as a comment?
The new content should be:

        shape {
            visible: false
            type: rectangle
            ...
        }
        
        shape {
            type: circle
            visible: false // visible: isRound === "true"
            // ideally, above, the old value is kept as a comment...
            ...
        }
        
        shape {
            visible: false
            // comment: "visible" not set, default "true" 
        }

The file is not just a list of shape structures, may contain other entries too. This should be **QML** compliant.

awk shows:

    awk --version
    GNU Awk 5.2.1, API 3.2
    Copyright (C) 1989, 1991-2022 Free Software Foundation.

**Edit**

I think I can use this PCRE regex: 

    (\s*shape\s*\{\n)(\s*)(.*?)(visible\:.*\n?)?(.*?)(\n\s*\})

with replace expression as:

    $1$2visible: false // $4\n$2$5$6

or

    \1\2visible: false // \4\n\2\5\6

but I need a tool to apply it. It is not perfect, still needs to not comment twice.
                        

Asked by mike (123 rep)

Feb 19, 2023, 03:42 PM
Last activity: Feb 26, 2023, 11:41 AM

Set key with value on a line in a file, if not exists between specific lines, or set specific value

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