replace direct calls to egrep with grep -E

The rest of the initial patch is not needed or incorrect in our usage.
Big changes for the dselect scripts seem unneeded as well as those are
hardly used by anyone anymore…

[commit message written by commiter]

Closes: 255577
Thanks: David Weinehall for initial patch

buildlib/libversion.mak

@@ -4,11 +4,11 @@
 # with each non-ABI break to the lib, please increase RELEASE.
 # The versionnumber is extracted from apt-pkg/macros.h - see also there.
 LIBAPTPKG_MAJOR=$(shell awk -v ORS='.' '/^\#define APT_PKG_M/ {print $$3}' $(BASE)/apt-pkg/contrib/macros.h | sed 's/\.$$//')
-LIBAPTPKG_RELEASE=$(shell grep -E '^\#define APT_PKG_RELEASE' $(BASE)/apt-pkg/contrib/macros.h | cut -d ' ' -f 3)
+LIBAPTPKG_RELEASE=$(shell grep '^\#define APT_PKG_RELEASE' $(BASE)/apt-pkg/contrib/macros.h | cut -d ' ' -f 3)
 
 # Version number of libapt-inst
 # Please increase MAJOR with each ABI break,
 # with each non-ABI break to the lib, please increase MINOR.
 # The versionnumber is extracted from apt-inst/makefile - see also there.
-LIBAPTINST_MAJOR=$(shell egrep '^MAJOR=' $(BASE)/apt-inst/makefile |cut -d '=' -f 2)
-LIBAPTINST_MINOR=$(shell egrep '^MINOR=' $(BASE)/apt-inst/makefile |cut -d '=' -f 2)
+LIBAPTINST_MAJOR=$(shell grep '^MAJOR=' $(BASE)/apt-inst/makefile |cut -d '=' -f 2)
+LIBAPTINST_MINOR=$(shell grep '^MINOR=' $(BASE)/apt-inst/makefile |cut -d '=' -f 2)

dselect/install

@@ -65,7 +65,7 @@ fi
 # Finished OK
 if [ $RES -eq 0 ]; then
 
-   if [ $(ls $ARCHIVES $ARCHIVES/partial | egrep -v "^lock$|^partial$" | wc -l) \
+   if [ $(ls $ARCHIVES $ARCHIVES/partial | grep -E -v "^lock$|^partial$" | wc -l) \
         -eq 0 ]; then
       exit 0
    fi

prepare-release

@@ -11,7 +11,7 @@ VERSION=$(dpkg-parsechangelog | sed -n -e '/^Version:/s/^Version: //p')
 DISTRIBUTION=$(dpkg-parsechangelog | sed -n -e '/^Distribution:/s/^Distribution: //p')
 
 LIBAPTPKGVERSION="$(awk -v ORS='.' '/^\#define APT_PKG_M/ {print $3}' apt-pkg/contrib/macros.h | sed 's/\.$//')"
-LIBAPTINSTVERSION="$(egrep '^MAJOR=' apt-inst/makefile |cut -d '=' -f 2)"
+LIBAPTINSTVERSION="$(grep '^MAJOR=' apt-inst/makefile |cut -d '=' -f 2)"
 
 librarysymbolsfromfile() {
 	local MISSING="$(grep '^+#MISSING' "$1")"

test/integration/test-apt-download-progress

@@ -13,7 +13,7 @@ changetohttpswebserver
 assertprogress() {
     T="$1"
     testsuccess grep "dlstatus:1:0:Retrieving file 1 of 1" "$T"
-    if ! egrep -q "dlstatus:1:[1-9][0-9](\..*)?:Retrieving file 1 of 1" "$T"; then
+    if ! grep -E -q "dlstatus:1:[1-9][0-9](\..*)?:Retrieving file 1 of 1" "$T"; then
         cat "$T"
         msgfail "Failed to detect download progress"
     fi