[Buildbot-devel] Global Environment

[Dustin J. Mitchell]

On Thu, Dec 11, 2008 at 1:35 PM, Razvan Lupusoru
<lupusoru at cse.ohio-state.edu> wrote:
> compileAndBuildFactory.addStep(ShellCommand(description='Checking
> environment', command=["/bin/env"], env={'INSTALL_PATH':
> '/srv/export/testing/$NOWINSTALLPATH/`svnversion`'}))
>
> There are four problems with this solution:

> 1) I cannot add an environment variable without explicitly running a command
> 2) The INSTALL_PATH variable is not existent for the rest of the steps

Even if the variable assignment worked as you'd like, it would only
set the environment variable for that invocation of env, which, of
course, terminates immediately.  That value would not be present for
the next step.

> 3) The $NOWINSTALLPATH variable is treated as a string instead of
> actually using a previously declared variable
> 4) `svnversion` is also treated as a string and does not run as a command

Yep - buildbot just puts those strings into the environment, rather
than invoking the shell on them.

> Ideas on how I can fix any of these problems?

Run each of your steps that need this environment variable as strings
that are passed to the shell, and set the variable at that point.

compileAndBuildFactory.addStep(ShellCommand(command="""
  INSTALL_PATH=/srv/export/testing/$NOWINSTALLPATH/`svnversion`
  /bin/env
  /do/my/thing
"""))

If this would produce a lot of code duplication, you can use a
SetProperty step to get the value once, and then substitute it into
later steps:

compileAndBuildFactory.addStep(SetProperty(property="install_path",
command="""
  echo /srv/export/testing/$NOWINSTALLPATH/`svnversion`
"""))
compileAndBuildFactory.addStep(ShellCommand(
command=WithProperties("""
  INSTALL_PATH="%(install_path)s"
  /bin/env
  /do/my/thing
""")))

Dustin

-- 
Storage Software Engineer
http://www.zmanda.com