#PSG (PS1 Generator) -- a better powerline for bash

PSG provides a means of providing structured colors to bash prompts so that properly blended powerlines work.

PSG reads a configuration from stdin in the form of a json strucure like the following:

{
    "style": {
        "powerline": "minimal"
    },
    "elements": [
        {
            "name" : "<a name in quotes>",
            "forground": "<256 color terminal color>",
            "background": "<256 color terminal color>",
            "default": "<any quoted text>", //optional
            "options" : {
                "match" : {
                    "from": "/",
                    "to": "\\"
                }
            }
        }
        ...
    ]
}

The "style" and "elements" sections are necessary, any other sections may be ignored however. Valid JSON syntax is a MUST.

Each object in the "elements" array consists of between 3 to 5 properties. The "name", "forground", and "background" properties are required. The "forground" and "background" properties are each given an 8bit color code. These codes and their corresponding colors can be shown by running the 'colors' binary built by 'make'.

The "default" property is not required, but any text provided in this property will be shown if none is provided on the command line.

The "options" property is currently only used for replacing single characters within each element's displayed text. In the example provided, all forward slashes are replaced with a backslash (unicode characters are valid replacements).

If an element has no text associated with it at runtime, it will not be displayed. Text becomes associated with an element either through the default property, or through assignment on the command line, as follows:

cat ~/.psg.json | psg user="$USER" path="${PWD/$HOME/\~}"

This will assign the contents of the $USER variable to the element named 'user' and the contents of the $PWD variable to the element named 'path'.

The powerline property defined the type of powerline status to generate. The options are "minimal" and "full". Example screenshots are provided: