diskimage-builder/elements/ubuntu
Ian Wienand 36b59c001c Standarise tracing for scripts
There is a wide variety of tracing options through the various shell
scripts.  Some use "set -eux", others explicity set xtrace and others
do nothing.  There is a "-x" option to bin/disk-image-create but it
doesn't flow down to the many scripts it calls.

This adds a global integer variable set by disk-image-create
DIB_DEBUG_TRACE.  All scripts have a stanza added to detect this and
turn on tracing.  Any other tracing methods are rolled into this.  So
the standard header is

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

Multiple -x options can be specified to dib-create-image, which
increases the value of DIB_DEBUG_TRACE.  If script authors feel their
script should only trace at higher levels, they should modify the
"-gt" value.  If they feel it should trace by default, they can modify
the default value also.

Changes to pachset 16 : scripts which currently trace themselves by
default have retained this behaviour with DIB_DEBUG_TRACE defaulting
to "1".  This was done by running [1] on patch set 15.  See the thread
beginning at [2]

dib-lint is also updated to look for the variable being matched.

[1] https://gist.github.com/ianw/71bbda9e6acc74ccd0fd
[2] http://lists.openstack.org/pipermail/openstack-dev/2014-November/051575.html

Change-Id: I6c5a962260741dcf6f89da9a33b96372a719b7b0
2015-02-12 10:41:32 +11:00
..
bin Standarise tracing for scripts 2015-02-12 10:41:32 +11:00
environment.d Merge "Only use Ec2 cloud-init data source for Ubuntu" 2014-06-10 23:06:27 +00:00
install.d Standarise tracing for scripts 2015-02-12 10:41:32 +11:00
pre-install.d Standarise tracing for scripts 2015-02-12 10:41:32 +11:00
root.d Standarise tracing for scripts 2015-02-12 10:41:32 +11:00
element-deps Only use Ec2 cloud-init data source for Ubuntu 2014-06-03 16:27:41 -07:00
element-provides Use provides to note an element provides an OS 2014-04-10 14:42:04 +01:00
package-installs.yaml Use package-installs for ubuntu and base elements 2015-02-06 10:13:08 -08:00
README.rst Create docs site containing element READMEs 2015-02-10 11:45:35 -08:00

======
ubuntu
======

Use Ubuntu cloud images as the baseline for built disk images.

Overrides:

 * To use a non-default URL for downloading base Ubuntu cloud images,
   use the environment variable DIB\_CLOUD\_IMAGES
 * To download a non-default release of Ubuntu cloud images, use the
   environment variable DIB\_RELEASE
 * To use different mirrors rather than the default of archive.ubuntu.com and
   security.ubuntu.com, use the environment variable DIB\_DISTRIBUTION\_MIRROR