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Item7751: Bootstrapping TWiki with the PSGI engine fails with "Template oopsattention not found"

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AppliesTo: Component: Priority: CurrentState: WaitingFor: TargetRelease ReleasedIn
Engine PSGIEngineContrib Low Closed TWiki:Main.HaraldJoerg    

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Detail

The PSGI engine should be able to bootstrap itself even when there's no initial LocalSite.cfg. But when I keep all default settings as provided and go to the "TWiki front page" as soon as this option is offered, then TWiki fails with "Template 'oopsattention' not found".

To reproduce in SVN checkout,

  1. Delete (or better: play it safe and rename smile ) lib/LocalSite.cfg
  2. Start the PSGI engine with plackup -Ilib psgi/twiki.psgi (of course, you need to have plackup available and TWiki:Plugins.PSGIEngineContrib pseudo-installed)
  3. Point your browser to http://localsite:5000
  4. Enter configure passwords and hit "Next"
  5. On the next screen, keep all settings and hit "Next"
  6. On the next screen, follow the link "Go to the TWiki front page"
  7. Ouch!
A workaround is to "Return to configuration" once more, and again hit "Next" without changing anything. After hitting "Next" the front page just works.

Root cause: In the initial configuration TWiki.spec the {TemplatePath} variable references $TWiki::cfg{TemplateDir} which doesn't get evaluated in the first round of configuration, when TWiki just tries to get the directory paths right. On the second round the directory paths are set, and {TemplatePath} is evaluated.

Action item: The engine should figure out when it is safe to evaluate {TemplatePath} and just do it before saving LocalSite.cfg.

BTW: The Windows personal edition is based on PSGI but doesn't have this problem since it ships with an initial LocalSite.cfg.

-- TWiki:Main/HaraldJoerg - 2016-08-11

ItemTemplate
Summary Bootstrapping TWiki with the PSGI engine fails with "Template oopsattention not found"
ReportedBy TWiki:Main.HaraldJoerg
Codebase ~twiki4, 6.0.2
SVN Range TWiki-6.0.2-trunk, Fri, 29 Jul 2016, build 30222
AppliesTo Engine
Component PSGIEngineContrib
Priority Low
CurrentState Closed
WaitingFor TWiki:Main.HaraldJoerg
Checkins TWikirev:30387
TargetRelease

ReleasedIn

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Topic revision: r3 - 2017-09-06 - HaraldJoerg
 
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