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User Software
Code repository
- Checking out code / Read access
Organization of the repository
lus.lofar.org/svn |-- code | |-- branches | `-- trunk | | |-- build | | |-- data | | |-- external | | `-- src `-- documents |-- branches `-- trunk
Checking out code
As read-only access to the repository is not restricted in any ways, you can obtain a working copy of the source code by running
svn co http://lus.lofar.org/svn/code/trunk lofarsoft
In case you not only want a working version of the source code, but also of the various documents, you do have two options to options of retrieval:
- Check out everything in a single go:
svn co http://lus.lofar.org/svn usg
- Check out a slightly cleaned-up version, omitting the
trunk
directories from your working version:mkdir usg cd usg svn co http://lus.lofar.org/svn/code/trunk code svn co http://lus.lofar.org/svn/documents/trunk docs
Updating your working copy
Go to the build
directory and type
make update
In the simplest case this might be nothing but a wrapper around the update
command of Subversion, but further actions might carried out if necessary.
Then build your target, for example “dal” with
make dal
You can also just build the target folder leaving everything else untouched using
cd dal make rebuild_cache && make && make install
Write access to the repository
While (by design) the user software repository is world-wide readable, write access is being restricted to a list of registered users. The basic procedure for getting added to that list – which basically relies on a combination of a username
and MD5 encrypted password
– is described below:
The information which needs to be provided by the user is a combination of username
and password
, where the latter is being hashed using the MD5 algorithm. The encryption of the password can be done in a number of ways, depending on the tools available to the user requesting access:
- Using
htpasswd
:htpasswd -nbm <username> <password>
- Using
openssl
:openssl passwd -apr1 <password>
If none of the above mentioned tools are available, use can be made of an online htpasswd generator.
Depending on the command line tool being used, the output will contain the full string to be entered into the password file or the encrypted password only (in which case the username needs to be prepended):
lbaehren:$apr1$ziNPu...$YYKeohAqIiIzfz4YA12345 ## htpasswd $apr1$9H8IBSvy$yswI9jLosDkDx1a6.12345 ## openssl
Software packages
- The Data Access Library (DAL) is a library that abstracts the underlying file format from the user when working with radio astronomy data. Underlying formats may include HDF5, AIPS++/CASA tables, FITS or specific raw formats. This library is available to both the C/C++ developer and the Python user via the “pydal” module.