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a command line interface to jinja;

Project description


a command line interface to jinja;

this program renders a jinja template using input data; data may be read from a file, environment variables, or command line arguments; either template or data file may be read from stdin; output file may be written to stdout;

supported data formats: ini, json, xml, yaml;


pip install jinja-cli


to render a jinja template with data in json format:

# jinja -d {data} {template}

to use a different data format:

# jinja -d {data} -f {data_format} {template}

to read template from stdin:

# jinja -d {data} < {template}

to read data from stdin:

# jinja -d - {template} < {data}

to read data from command line arguments:

# jinja -D {key} {value} [ -D {key} {value} ... ] {template}

to read data from environment variables:

# jinja -E {key} [ -E {key} ... ] {template}

to read data from environment variables using regex:

# jinja -X {regex} {template}

to output to a file:

# jinja -d {data} -o {output} {template}


template file example.j2:

sheep eat {{ }};

data file example.json:

    "sheep": {
        "eat": "grass"

any of these commands:

# jinja -d example.json example.j2
# jinja -d example.json < example.j2
# jinja -d - -f json example.j2 < example.json


sheep eat grass;

data priority

data priority from low to high:

  • environment variables: -E, --env, -X, --env-regex;

  • data file: -d, --data;

  • command line arguments: -D, --define;

undefined variables

option -u, --undefined sets how undefined variables are handled:

  • '': an undefined variable can be printed and iterated over; this is the default;

  • 'chainable': an undefined variable is chainable;

  • 'debug': an undefined variable returns debug info when printed;

  • 'strict': an undefined variable barks on print, iteration, boolean tests and comparisons;


Copyright (C) 2018-2021 Cyker Way

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see

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