[dev] libcloud pull request: [RFC] Command line utility for updating pricing file

[Kami <gi...@git.apache.org>]

GitHub user Kami opened a pull request:

    https://github.com/apache/libcloud/pull/127

    [RFC] Command line utility for updating pricing file

    This branch adds a command line tool for updating pricing file (as discussed in the last design day). It includes the following changes:
    
    1. Modifies the pricing code, to read pricing data from `~/.libcloud/pricing.json` file, if it exists. If it doesn't it reads it from a pricing file which is bundled with a libcloud distribution.
    2. Adds a command line tool to download the latest pricing file from our git repository and saves it to `~/.libcloud/pricing.json` 
    
    Example CLI tool usage:
    
    ```bash
    $ libcloud update-pricing [--file-path=~/.libcloud/pricing.json] [--file-url=...]
    ```
    
    The tool is non-interactive (so it can be used in a cronjob, etc) and it's very simple. It doesn't perform any update checks and it simply overwrites  the file at `~/.libcloud/pricing.json`. 
    
    Since the pricing file is small, the current approach is imo totally fine. Adding extra code to handle "only update if necessary" by using hash comparison / modified-at or similar approach would imo just add unnecessary complexity with very little benefit.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/Kami/libcloud pricing_file_changes

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/libcloud/pull/127.patch

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