diskimage-builder/elements/dib-python/pre-install.d/01-dib-python

#!/bin/bash

if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail

python_path=$(command -v python${DIB_PYTHON_VERSION})
if [ -z "$python_path" ]; then
    echo "Could not find python${DIB_PYTHON_VERSION} executable."
    exit 1
fi

ln -sf $python_path /usr/local/bin/dib-python
Add dib-python element Creating an element which we can use in #! lines to refer to either python2 or python3 depending on what it available. Change-Id: Ic47e18ad21c33ab9f0d11c04260a33725aeee814 2015-12-10 19:38:53 +00:00			`#!/bin/bash`

			`if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then`
			`set -x`
			`fi`
			`set -eu`
			`set -o pipefail`

Make dib-python use the default python for distro Right now dib-python works by trying to find any python on a system in an order of precedence. A much better way is if we are explicit about the python we intend to be there which will allow us to make better decisions in other elements (such as allowing for package-installs to take into account DIB_PYTHON_VERSION) as well as allow for users to specify a preferred python version. Co-Authored-By: Adam Harwell <flux.adam@gmail.com> Change-Id: Ie609de51cc5fcde701296c9474e315981d9778a2 2016-12-07 20:26:43 +00:00			`python_path=$(command -v python${DIB_PYTHON_VERSION})`
Add dib-python element Creating an element which we can use in #! lines to refer to either python2 or python3 depending on what it available. Change-Id: Ic47e18ad21c33ab9f0d11c04260a33725aeee814 2015-12-10 19:38:53 +00:00			`if [ -z "$python_path" ]; then`
Make dib-python use the default python for distro Right now dib-python works by trying to find any python on a system in an order of precedence. A much better way is if we are explicit about the python we intend to be there which will allow us to make better decisions in other elements (such as allowing for package-installs to take into account DIB_PYTHON_VERSION) as well as allow for users to specify a preferred python version. Co-Authored-By: Adam Harwell <flux.adam@gmail.com> Change-Id: Ie609de51cc5fcde701296c9474e315981d9778a2 2016-12-07 20:26:43 +00:00			`echo "Could not find python${DIB_PYTHON_VERSION} executable."`
Add dib-python element Creating an element which we can use in #! lines to refer to either python2 or python3 depending on what it available. Change-Id: Ic47e18ad21c33ab9f0d11c04260a33725aeee814 2015-12-10 19:38:53 +00:00			`exit 1`
			`fi`

Force dib-python symlink creation The undercloud actually has dib run twice on it - once to create the instack image, and again when we run instack itself. The first run creates the dib-python symlink, and the second blows up because the link already exists. Force the link creation so the script is idempotent. Change-Id: I78f9e6f5afcf8ebe6d7911a7a434525ba7c737cf 2016-01-21 19:25:33 +00:00			`ln -sf $python_path /usr/local/bin/dib-python`