[glibc] Remove obscure uses of shell redirections.

[Carlos O'Donell]

commit 02e8252613ef6abf2d04c4e599037496d686e6df
Author: Carlos O'Donell <carlos at redhat.com>
Date:   Thu Jul 25 20:17:30 2013 -0400

    Remove obscure uses of shell redirections.
    
    This patch makes the spec file slightly more friendly to non-shell
    readers by changing "> foo" to "truncate -s 0 foo" and removes
    the use of ">> foo". The use of ">> foo" is perhaps the most
    interesting shell trick which is used to create a zero sized
    debuginfocommon.filelist, but only if it doesn't already exist.
    This allows the subsequent command to use debuginfocommon.filelist
    without requiring it be wrapped in a check for
    %{debuginfocommonarches}. That seems a little obtuse and certainly
    confusing to the reader who expects such a check for anything
    that is related to the debuginfo common package.

 glibc.spec |   24 +++++++++++++-----------
 1 files changed, 13 insertions(+), 11 deletions(-)
---
diff --git a/glibc.spec b/glibc.spec
index 0768f46..b307eb6 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -895,17 +895,17 @@ install -m 644 releng/nscd.service releng/nscd.socket $RPM_BUILD_ROOT/lib/system
 
 # Include ld.so.conf
 echo 'include ld.so.conf.d/*.conf' > $RPM_BUILD_ROOT/etc/ld.so.conf
-> $RPM_BUILD_ROOT/etc/ld.so.cache
+truncate -size 0 $RPM_BUILD_ROOT/etc/ld.so.cache
 chmod 644 $RPM_BUILD_ROOT/etc/ld.so.conf
 mkdir -p $RPM_BUILD_ROOT/etc/ld.so.conf.d
 %ifnarch %{auxarches}
 mkdir -p $RPM_BUILD_ROOT/etc/sysconfig
-> $RPM_BUILD_ROOT/etc/sysconfig/nscd
-> $RPM_BUILD_ROOT/etc/gai.conf
+truncate -size 0 $RPM_BUILD_ROOT/etc/sysconfig/nscd
+truncate -size 0 $RPM_BUILD_ROOT/etc/gai.conf
 %endif
 
 # Include %{_prefix}/%{_lib}/gconv/gconv-modules.cache
-> $RPM_BUILD_ROOT%{_prefix}/%{_lib}/gconv/gconv-modules.cache
+truncate -size 0 $RPM_BUILD_ROOT%{_prefix}/%{_lib}/gconv/gconv-modules.cache
 chmod 644 $RPM_BUILD_ROOT%{_prefix}/%{_lib}/gconv/gconv-modules.cache
 
 ##############################################################################
@@ -1083,7 +1083,7 @@ sed -i -e '\|%{_prefix}/bin|d' \
 ##############################################################################
 # Build the xen package file list (nosegneg.filelist)
 ##############################################################################
-> nosegneg.filelist
+truncate -size 0 nosegneg.filelist
 %if %{xenpackage}
 grep '/%{_lib}/%{nosegneg_subdir}' < rpm.filelist >> nosegneg.filelist
 sed -i -e '\|/%{_lib}/%{nosegneg_subdir}|d' rpm.filelist
@@ -1334,11 +1334,13 @@ rm -f $RPM_BUILD_ROOT%{_infodir}/dir
 
 # Delete files that we do not intended to ship with the auxarch.
 echo Cutting down the list of unpackaged files
->> debuginfocommon.filelist
 sed -e '/%%dir/d;/%%config/d;/%%verify/d;s/%%lang([^)]*) //;s#^/*##' \
-    common.filelist devel.filelist static.filelist headers.filelist \
-    utils.filelist nscd.filelist debuginfocommon.filelist |
-(cd $RPM_BUILD_ROOT; xargs --no-run-if-empty rm -f 2> /dev/null || :)
+	common.filelist devel.filelist static.filelist headers.filelist \
+	utils.filelist nscd.filelist \
+%ifarch %{debuginfocommonarches}
+	debuginfocommon.filelist \
+%endif
+	| (cd $RPM_BUILD_ROOT; xargs --no-run-if-empty rm -f 2> /dev/null || :)
 
 # The auxarch doesn't install pt_chown.
 rm -f $RPM_BUILD_ROOT%{_prefix}/libexec/pt_chown
@@ -1352,11 +1354,11 @@ touch $RPM_BUILD_ROOT/var/run/nscd/{socket,nscd.pid}
 %endif # %{auxarches}
 
 %ifnarch %{auxarches}
-> $RPM_BUILD_ROOT/%{_prefix}/lib/locale/locale-archive
+truncate -size 0 $RPM_BUILD_ROOT/%{_prefix}/lib/locale/locale-archive
 %endif
 
 mkdir -p $RPM_BUILD_ROOT/var/cache/ldconfig
-> $RPM_BUILD_ROOT/var/cache/ldconfig/aux-cache
+truncate -size 0 $RPM_BUILD_ROOT/var/cache/ldconfig/aux-cache
 
 %pre -p <lua>
 -- Check that the running kernel is new enough