How To Unzip Files in Mitto

How To Unzip Files in Mitto

It's inevitable that if you deal with enough data, especially exporting data from source systems, that you'll eventually need deal with .zip, .gz, or tar.gz files.

To get this into a database, you will likely need to unzip the file and use the decompressed files inside. The following steps will guide you through the process of unzipping a compressed file in Mitto, saving the decompressed files in Mitto, and preparing them to be loaded into a database.

  1. Make sure that the unzip utility is installed on the Mitto box sudo apt-get install unzip. If you are unsure how to SSH to your Mitto instance, or your instance is being hosted by Zuar, please file a ticket here!
  2. Create a command line job unzip with the following code:
{
    "cmd": "unzip /var/mitto/data/_filename_.zip -d /var/mitto/data",
    "cmd_env": {},
    "exec": false,
    "shell": true
}

The command is unzip follow by the location of the zip file in Mitto /var/mitto/data/filename.zip , ending with the destination to place the extracted files -d /var/mitto/data (Mitto's data folder).

These commands can be adjusted to target .gz files and tar.gz files, or gunzip or tar -xf filename.tar.gz respectively.

What if you want to unzip multiple files or create a wildcard match? Here is how to search for multiple files that are named something like data_2018.zip, data_2019.zip, data_2020.zip, data_2021.zip:

{
    "cmd": "unzip /var/mitto/data/'data_*.zip' -d /var/mitto/data",
    "cmd_env": {},
    "exec": false,
    "shell": true
}

Lastly, what if you need to automate this as the data continues to change and you must overwrite old files that are being decompressed? Add a simple overwrite command -o after the unzip command. The cmd line will then look like:

"cmd": "unzip -o /var/mitto/data/'data_*.zip' -d /var/mitto/data",

All together, the final solution will look like:

{
    "cmd": "unzip -o /var/mitto/data/'data_*.zip' -d /var/mitto/data",
    "cmd_env": {},
    "exec": false,
    "shell": true
}

This command will unzip all files that start with data_ and end with .zip , place them in Mitto's data folder and overwrite existing files with the same name.

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