This file is indexed.

postinst is in libslepc3.7.4-dev 3.7.4+dfsg1-2build8.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh -e

DEB_HOST_MULTIARCH=x86_64-linux-gnu

SONAME=3.7

SLEPC_VERSION=3.7.4
SLEPC_ARCH=${DEB_HOST_MULTIARCH}
SLEPC_REAL_ARCH=${SLEPC_ARCH}-real
SLEPC_VERSION_NUMBER=$( echo ${SLEPC_VERSION} | sed "s/\.//g" )

SLEPC_DIR_REAL=/usr/lib/slepcdir/${SLEPC_VERSION}/${SLEPC_REAL_ARCH}

# Make alternatives links
if [ "$1" = "configure" ]; then

# alternative libslepc.so.multiarch is deprecated
# test if libslepc.so.multiarch is still in use, so remove old slepc alternatives
# This should be safe since Conflicts are set up with the dev package versions using deprecated libslepc.so.multiarch.
if update-alternatives --query slepc | grep libslepc.so.multiarch > /dev/null ; then
  echo Removing deprecated slepc alternatives using libslepc.so.multiarch.
  for alt in `update-alternatives --list slepc`; do
    update-alternatives --remove slepc ${alt}
  done
fi

# alternative default slepc (e.g. real or complex)
update-alternatives --install /usr/lib/slepc slepc /usr/lib/slepcdir/${SLEPC_VERSION}/${SLEPC_REAL_ARCH} ${SLEPC_VERSION_NUMBER}77 \
  --slave /usr/lib/${DEB_HOST_MULTIARCH}/libslepc.so libslepc.so /usr/lib/${DEB_HOST_MULTIARCH}/libslepc_real.so.${SLEPC_VERSION} \
  --slave /usr/include/slepc slepcinclude /usr/lib/slepcdir/${SLEPC_VERSION}/${SLEPC_REAL_ARCH}/include \
  --slave /usr/lib/${DEB_HOST_MULTIARCH}/pkgconfig/SLEPc.pc SLEPc.pc /usr/lib/slepcdir/${SLEPC_VERSION}/${SLEPC_REAL_ARCH}/lib/pkgconfig/SLEPc.pc

# alternative base version of slepc real
update-alternatives --install /usr/lib/${DEB_HOST_MULTIARCH}/libslepc_real.so libslepc_real.so /usr/lib/${DEB_HOST_MULTIARCH}/libslepc_real.so.${SLEPC_VERSION} ${SLEPC_VERSION_NUMBER}77

# alternative slepc for this X.Y soname (e.g. real or complex)
update-alternatives --install /usr/lib/slepcdir/${SONAME} slepc${SONAME} ${SLEPC_DIR_REAL} ${SLEPC_VERSION_NUMBER}77

# alternative real slepc for this X.Y soname
update-alternatives --install /usr/lib/slepcdir/${SONAME}-real slepc${SONAME}-real ${SLEPC_DIR_REAL} ${SLEPC_VERSION_NUMBER}77

fi