CODEWITHSUNDEEP
rpmspecificationsrpmbuildrpm-spec
Bharani viswas
Bharani viswas

Reputation: 3

How do i delete a file that is installed from post installation of a rpm and is not needed in the upgrade of it?

Following is the first version of rpm spec 

    %post
    if [ "$1" = "1" ];
    then
        touch /usr/bin/item1.txt
        touch /usr/bin/item2.txt
        echo "i am in and this line is written from rpm 1-1">>/usr/bin/item1.txt
        echo "i am in and this line is written from rpm 1-1">>/usr/bin/item2.txt
    fi          
    %preun    
    if [ "$1" = "0" ];
    then
        sed -i "/i am in and this line is written from rpm 1-1 /d" /usr/bin/item1.txt
        sed -i "/i am in and this line is written from rpm 1-1 /d" /usr/bin/item2.txt
        rm -rf /usr/bin/item1.txt
        rm -rf /usr/bin/item2.txt
    fi
    if [ "$1" = "1" ];
    then
     # what should be here ?
    fi

The seacond version of rpm spec is as follows 

%post
if [ "$1" = "1" ];
then
    touch /usr/bin/item1.txt
    echo "xyz1" >> /usr/bin/item1.txt
    touch /usr/bin/item3.txt
    echo "xyz3" >> /usr/bin/item3.txt
fi

if [ "$1" = "2" ];
then
    # what should be here if i want to remove item2.txt file and add item3.txt
fi
%preun
if [ "$1" = "0" ];
then
# will i have to remove all the files item1 and item 2 along with item3.txt here 
fi

if [ "$1" = "1" ];
then
    ##
fi

i want to simply remove the file item2 which is already intalled in post install script of base rpm and install item3.txt file as part of upgrade.

Upvotes: 0

Views: 2081

Answers (1)

Chris Maes
Chris Maes

Reputation: 37802

It seems you have a wrong idea of how rpm packaging works. Hereis a sample workflow that would create package-1.0.0-0.spec and package-2.0.0-0.rpmfile:

create the two files that you want to package (these command happen outside the spec file, just like when you write code):

echo "i am in and this line is written from rpm 1" > item1.txt
echo "i am in and this line is written from rpm 1" > item2.txt

now create a spec file just beside with these parts:

Version: 1.0.0
Release: 0

%install
install -d -m 0755 "${RPM_BUILD_ROOT}/usr/bin/"
cp item1.txt ${RPM_BUILD_ROOT}/usr/bin/
cp item2.txt ${RPM_BUILD_ROOT}/usr/bin/

%files
/usr/bin/item1.txt
/usr/bin/item2.txt

this will create package-1.0.0-0.rpm containing item1.txt and item2.txt now suppose we want to create the next version; then:

echo "xyz1" >> item1.txt
echo "xyz3" >> item3.txt

the spec file should now contain:

Version: 2.0.0
Release: 0

%install
install -d -m 0755 "${RPM_BUILD_ROOT}/usr/bin/"
cp item1.txt ${RPM_BUILD_ROOT}/usr/bin/
cp item3.txt ${RPM_BUILD_ROOT}/usr/bin/

%files
/usr/bin/item1.txt
/usr/bin/item3.txt

which will create package-2.0.0-0.rpm. Upon upgrade, rpm will now remove /usr/bin/item2.txt and install the new versions of item1.txt and item3.txt

Upvotes: 0

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