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$ ~/parse-with-help-from-git.sh data --game-tag foo
Hi from the data command
INPUT_FILE=
DATASET=
GAME_TAG=foo
[amit.bakshi@gii1302greendog bin (master)]
$ ~/parse-with-help-from-git.sh data --bad-arg foo
error: unknown option `bad-arg'
usage:     parse-with-help-from-git subcommand <options>
    subcommands:
    data                 - download a dataset

    -h, --help            show help
    -d, --debug           debug output
    -v, --verbose         verbose output
    -f, --file ...        input file

options for data
    --dataset ...         specify dataset to download (eg, 20140219_26816) (default: latest)
    -g, --game-tag ...    specify game-tag (default: GAME_TAG env or hc)