This is pre-publication software that is currently under active development. Use it at your own risk. Bug reports are welcome, but user support is not provided at this time.

Antimicrobial Resistance Identification By Assembly

For how to use ARIBA, please see the ARIBA wiki page.

ARIBA has the following dependencies, which need to be installed:

• Python3 version >= 3.3.2
• Bowtie2 version >= 2.1.0
• CD-HIT version >= 4.6
• MUMmer version >= 3.23

Once the dependencies are installed, install ARIBA using pip:

pip3 install ariba

ARIBA also depends on several Python packages, all of which are available via pip, so the above command will get those automatically if they are not installed. The packages are dendropy >= 4.2.0, matplotlib (no minimum version required, but only tested on 2.0.0), pyfastaq >= 3.12.0, pysam >= 0.9.1, and pymummer >= 0.10.1.

Alternatively, you can download the latest release from this github repository, or clone the repository. Then run the tests:

python3 setup.py test

If the tests all pass, install:

python3 setup.py install

ARIBA can be run in a Docker container. First of all install Docker, then to install ARIBA run:

docker pull sangerpathogens/ariba

To use ARIBA you would use a command such as this (substituting in your directories), where your files are assumed to be stored in /home/ubuntu/data:

docker run --rm -it -v /home/ubuntu/data:/data sangerpathogens/ariba ariba -h

ARIBA is available in the latest version of Debian, and over time will progressively filter through to Ubuntu and other distributions which use Debian. To install it as root:

sudo apt-get install ariba

By default, ARIBA will look for the dependencies in your $PATH, using the names in the table below. This behaviour can be overridden and point ARIBA to a specific program using environment variables. The environment variable is checked first and is used if it is set. Otherwise ARIBA looks in your $PATH for the default name. This applies to the following dependencies.

For example, you could specify an exact version of a bowtie2 executable that you compiled and downloaded in your home directory (assuming BASH):

export ARIBA_BOWTIE2=$HOME/bowtie2-2.1.0/bowtie2

Note that ARIBA also runs bowtie2-build, for which it uses the bowtie2 executable with -build appended. So in this case it would try to use

$HOME/bowtie2-2.1.0/bowtie2-build

### Temporary files

ARIBA can temporarily make a large number of files whilst running, which are put in a temporary directory made by ARIBA. The total size of these files is small, but there can be a many of them. This can be a problem when running large numbers (100s or 1000s) of jobs simultaneously on the same file system. The parent directory of the temporary directory is determined in the following order of precedence:

1. The value of the option --tmp_dir (if that option was used)
2. The environment variable $ARIBA_TMPDIR (if it is set)
3. The environment variable $TMPDIR (if it is set)
4. If none of the above is found, then use the run's output directory.

Each temporary directory is unique to one run of ARIBA, and is automatically deleted at the end of the run (even if ARIBA was killed by the user or crashed). For example,

export $ARIBA_TMPDIR=/tmp

will result in the creation of a new directory inside /tmp, which will have a name of the form

/tmp/ariba.tmp.abcdef

where the suffix abcdef is a random string of characters, chosen such that /tmp/ariba.tmp.abcdef does not already exist.

The exception to the above is if the option --noclean is used. This forces the temporary directory to be placed in the output directory, and temporary files are kept. It is intended for debugging.

Please read the ARIBA wiki page for usage instructions.

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