README: Update

README.md

@@ -8,14 +8,24 @@ See:
 * https://www.dectris.com/features/features-eiger-x/hdf5-and-nexus
 * https://strucbio.biologie.uni-konstanz.de/xdswiki
 
-## Get Durin
+## Paul Scherrer Institute fork
+This fork is maintained by Paul Scherrer Institute.
+The plugin is based on the code developed by the Diamond Light Source and modified by Global Phasing.
+Modifications from PSI side:
+* Using CMake for building the plugin
+* HDF5 is built as part of the CMake process
+* Bitshuffle/LZ4 is updated to the latest version
+* HDF5 filter is automatically registered for virtual dataset HDF5 files
+* Docker image to build the plugin on x86/RH7 is provided.
+* Generated versioned shared library, so the used version can be tracked.
 
-Latest release at https://github.com/DiamondLightSource/durin/releases/tag/2019v1
+## Get Durin
+Linux x86 version is automatically built on RHEL 7 and available from the Gitea release page.
 
 ## Usage
 In your XDS.INP add:
 ```
-LIB=[path to durin-plugin.so]
+LIB=[path to libdurin-plugin.so]
 NAME_TEMPLATE_OF_DATA_FRAMES=[data_path]/data_images_??????.h5
 ```
 XDS will instruct the plugin to load `[data_path]/data_images_master.h5` and this must be the
@@ -27,55 +37,25 @@ the master file contains an `NXdata` or `NXdetector` group with either a dataset
 series of datasets named `data_000001`, `data_000002`, etc.
 
 
-## Requirements
-* HDF5 Library (https://www.hdfgroup.org/downloads)
-
-
 ## Building
-
-### Building HDF5 library
-The HDF5 library used when building durin must have been compiled with specific switches enabled
-to allow the durin plugin to be built and used.
-
-Download the HDF5 source code (https://www.hdfgroup.org/downloads/hdf5/source-code) and extract
-to any directory (referred to as `/hdf5_dir`), and run the following commands.
+Requires CMake version 3.19 or later + GCC compiler. There is no need to build HDF5 separately.
+To build:
 ```
-cd /hdf5_dir
 mkdir build
 cd build
-export CFLAGS=-fPIC
-../configure --enable-threadsafe --enable-deprecated-symbols --enable-hl --enable-unsupported
-make
-make check
-make install
+cmake ..
+make -j
 ```
-The hdf5 tools and libraries should now be located in `/hdf5_dir/build/hdf5`
-
-For reference, the plugin requires the thread-safe switch and the optimised chunk read function.
-The chunk read function may be defined in the high level library instead of the regular library,
-depending on the exact HDF5 version downloaded (hence the --enable-deprecated-symbols _and_ --enable-hl).
-The unsupported flag enables building with both threadsafe and high-level enabled.
-
-
-### Building durin plugin
-The plugin makefile will use the "h5cc" compiler wrapper, provided by the HDF5 library, which
-must be on your PATH.
-Download or clone the plugin source code (https://github.com/DiamondLightSource/durin)
-into any directory (referred to as `/durin_dir`) and run the following commands.
-```
-cd /durin_dir
-PATH=/hdf5_dir/build/hdf5/bin:$PATH
-make
-```
-The plugin is located at `/durin_dir/build/durin-plugin.so` and should be added to the
-XDS.INP file as `LIB=/durin_dir/build/durin-plugin.so`
-
 
+The plugin is located at `build/libdurin-plugin.so` and should be added to the
+XDS.INP file as `LIB=<CURRENT_DIRECTORY>/build/libdurin-plugin.so`.
+Alternatively, versioned copy is also provided, e.g. `libdurin-plugin.so.1.0.0`, allowing to track 
+the current version of the plugin.
 
 ## Example XDS.INP
 ```
 DETECTOR=PILATUS MINIMUM_VALID_PIXEL_VALUE=0 OVERLOAD=4096
-LIB=/opt/durin/build/durin-plugin.so
+LIB=/opt/durin/build/libdurin-plugin.so
 SENSOR_THICKNESS= 0.450
 !SENSOR_MATERIAL / THICKNESS Si 0.450
 !SILICON= 3.953379
@@ -95,6 +75,3 @@ TRUSTED_REGION= 0.0 1.41
 DATA_RANGE= 1 600
 JOB=XYCORR INIT COLSPOT IDXREF DEFPIX INTEGRATE CORRECT
 ```
-
-N.B. the master file is needed, not the .nxs one which follows the
-standard.