Remove installed packages before pip install
The release of pip10 has shown up a few issues here Firstly, pip10 now refuses to overwrite distutils installed packages, which includes "python-virtualenv" on centos. History has shown us that we want the packages installed and overwritten, to avoid the packages coming back and messing things up. Pre-install all the packages, then list the files in the packages with "rpm" directly and remove them. This way pip is happy to install. We need to take better account of the package names for this; on Fedora things have switch to "python2-virtualenv" instead of "python-virtualenv" and we can't use an alias to list the package contents. This also highlighted that python2-pip is in EPEL for centos, so enable that when we install it. Make the epel element a no-op for non centos/rhe distros. There is a related change in recent fedora that python3 now installs binaries into /usr/local/bin. There are commented swizzles in here to ensure we retain the status quo of "pip" and "virtualenv" both being python2 based, with the python3 versions being called explicitly "pip3" and "virtualenv3" respectively. Change-Id: I2ffdd9f615ae6b00428c17249e4f216774991b99
This commit is contained in:
Ian Wienand
parent
0769bfd4aa
commit
b423292cd0
@ -5,7 +5,7 @@ epel
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This element installs the Extra Packages for Enterprise Linux (EPEL)
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repository GPG key as well as configuration for yum.
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Note this element only works with platforms that have EPEL support
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Note this element is only useful with platforms that have EPEL support
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such as CentOS and RHEL
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DIB_EPEL_MIRROR:
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16
diskimage_builder/elements/epel/pkg-map
Normal file
16
diskimage_builder/elements/epel/pkg-map
Normal file
@ -0,0 +1,16 @@
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{
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"distro": {
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"centos7": {
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"wget": "wget",
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"yum-utils": "yum-utils"
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},
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"rhel7": {
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"wget": "wget",
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"yum-utils": "yum-utils"
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}
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},
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"default": {
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"wget": "",
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"yum-utils": ""
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}
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}
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@ -25,7 +25,8 @@ else
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;;
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*)
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echo "$DISTRO_NAME is not supported"
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exit 1
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# Not really a failure; we just don't do anything
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exit 0
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;;
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esac
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PKG_NAME=$(wget -q $URL -O - |grep -oE "(href=\"epel-release-$RELEASE-[0-9,.].*)" | cut -d'"' -f2)
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@ -1,4 +1,5 @@
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dib-python
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epel
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install-types
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package-installs
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source-repositories
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@ -8,12 +8,31 @@ set -o pipefail
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if [[ $DISTRO_NAME =~ (opensuse|fedora|centos|centos7|rhel7) ]]; then
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# Default packages
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_do_py3=0
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packages="python-virtualenv python-pip python-setuptools"
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if [[ $DISTRO_NAME =~ (fedora) ]]; then
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_do_py3=1
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packages+=" python3-virtualenv python3-pip python3-setuptools"
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fi
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_extra_repo=''
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case "$DISTRO_NAME" in
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centos*|rhel7)
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# note python2-pip in epel
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_extra_repo="--enablerepo=epel"
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packages="python-virtualenv python2-pip python-setuptools"
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;;
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fedora)
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_do_py3=1
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packages="python2-virtualenv python2-pip python2-setuptools"
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packages+=" python3-virtualenv python3-pip python3-setuptools"
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;;
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opensuse)
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case "$DIB_RELEASE" in
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42*)
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packages="python-virtualenv python-pip python-setuptools"
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;;
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tumbleweed)
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# XXX: python3?
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packages="python2-virtualenv python2-pip python2-setuptools"
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;;
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esac
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esac
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# force things to happen so our assumptions hold
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pip_args="-U --force-reinstall"
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@ -30,36 +49,49 @@ if [[ $DISTRO_NAME =~ (opensuse|fedora|centos|centos7|rhel7) ]]; then
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if [[ $DISTRO_NAME = opensuse ]]; then
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zypper -n install $packages
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else
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${YUM:-yum} install -y $packages
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${YUM:-yum} ${_extra_repo} install -y $packages
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fi
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# pip10 (unlike earlier versions) will not uninstall distutils
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# installed packages (note this is only a subset of packages that
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# don't use setuptools for various reasons). We give it a little
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# help by clearing out the files from the packages we are about to
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# re-install so pip doesn't think anything is installed. See:
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# https://github.com/pypa/pip/issues/4805
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for pkg in $packages; do
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rpm -ql $pkg | xargs rm -rf
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done
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# install the latest python2 pip; this overwrites packaged pip
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python /tmp/get-pip.py ${pip_args}
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# pip and setuptools are closely related; we want to ensure the
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# latest for sanity. Because distro packages don't include enough
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# info in the egg for pip to be certain it has fully uninstalled
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# the old package, for safety we clear it out by hand (this seems
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# to have been a problem with very old to new updates,
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# e.g. centos6 to current-era, but less so for smaller jumps).
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# There is a bit of chicken-and-egg problem with pip in that it
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# requires setuptools for some operations, such as wheel creation.
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# But just installing setuptools shouldn't require setuptools
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# itself, so we are safe for this small section.
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rm -rf /usr/lib/python2.7/site-packages/setuptools*
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# Install latest setuptools; there is a slight chicken-egg issue in
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# that pip requires setuptools for some operations like building a
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# wheel. But this simple install should be fine.
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pip install ${pip_args} setuptools
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if [[ $_do_py3 -eq 1 ]]; then
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# Repeat above for python3
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# python2 on fedora always installs into /usr/bin. Move pip2
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# binary out, as we want "pip" in the final image to be
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# python2 for historical reasons.
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mv /usr/bin/pip /usr/bin/pip2
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# You would think that installing python3 bits first, then
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# python2 would work -- alas get-pip.py doesn't seem to leave
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# python3 alone:
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# https://github.com/pypa/pip/issues/4435
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python3 /tmp/get-pip.py ${pip_args}
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rm -rf /usr/lib/python3.?/site-packages/setuptools*
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pip3 install ${pip_args} setuptools
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# reclaim /usr/bin/pip back to pip2
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# on < 27, this installed pip3 to /usr/bin/pip. On >=27 it's
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# /usr/local/bin/pip. reclaim /usr/bin/pip back to pip2 and
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# remove the /usr/local/bin/pip (i.e. python3 version) if it
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# exists, so that "pip" calls pip2 always. if we want pip3 we
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# call it explicitly.
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ln -sf /usr/bin/pip2 /usr/bin/pip
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rm -f /usr/local/bin/pip
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fi
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# now install latest virtualenv. it vendors stuff it needs so
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@ -67,14 +99,27 @@ if [[ $DISTRO_NAME =~ (opensuse|fedora|centos|centos7|rhel7) ]]; then
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# python[2|3]-virtualenv package has installed versioned scripts
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# (/usr/bin/virtualenv-[2|3]) but upstream does not! (see [2]).
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# For consistency, clear them out and then reinstall so we're just
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# left with python2's version
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# [2] http://pkgs.fedoraproject.org/cgit/rpms/python-virtualenv.git/tree/python-virtualenv.spec#n116)
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rm /usr/bin/virtualenv*
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# For consistency, reinstall so we're just left with python2's
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# version. Note this is a rather moot point, the usual way we get
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# a python3 environment is to call "virtualenv -p python3 foo" and
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# that works to create a python3 virtualenv, even if using
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# python2's version. Thus we probably don't *really* need to
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# "pip3 install virtualenv". What we don't want is "virtualenv
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# foo" creating a python3 virtualenv by default, because that
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# confuses a lot of legacy code.
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#
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#[2] http://pkgs.fedoraproject.org/cgit/rpms/python-virtualenv.git/tree/python-virtualenv.spec#n116)
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pip install ${pip_args} virtualenv
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mv /usr/bin/virtualenv /usr/bin/virtualenv2
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if [[ $_do_py3 -eq 1 ]]; then
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pip3 install ${pip_args} virtualenv
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fi
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pip install ${pip_args} virtualenv
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# Reclaim virtualenv to virtualenv2; similar to above, on fedora
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# >27 the pip3 version has gone into /usr/local/bin; remove it so
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# only /usr/bin/virtualenv exists
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ln -sf /usr/bin/virtualenv2 /usr/bin/virtualenv
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rm -f /usr/local/bin/virtualenv
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# at this point, we should have the latest
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# pip/setuptools/virtualenv packages for python2 & 3, and
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