[tor-bugs] #33606 [Core Tor/sbws]: Catch common bash errors in sbws scripts

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#33606: Catch common bash errors in sbws scripts
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     Reporter:  teor           |      Owner:  (none)
         Type:  task           |     Status:  new
     Priority:  Medium         |  Milestone:
    Component:  Core Tor/sbws  |    Version:
     Severity:  Normal         |   Keywords:
Actual Points:                 |  Parent ID:
       Points:                 |   Reviewer:
      Sponsor:                 |
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 We're going to gradually update tor, chutney, and fallback-scripts bash
 scripts to catch more errors. sbws might also want to make similar
 changes.

 I'm not sure if sbws uses shellcheck already. Shellcheck helps catch
 errors while writing scripts.

 To catch more runtime failures, set these options at the start of each
 script:
 {{{
 set -e
 set -u
 set -o pipefail
 }}}

 You might also want to set:
 {{{
 IFS=$'\n\t'
 }}}
 But it can change how lists are processed.

 These settings help catch common errors in bash scripts at runtime:
 http://redsymbol.net/articles/unofficial-bash-strict-mode/

 But they can cause scripts to fail, so you should have good unit tests and
 CI for all your scripts, before making these changes.

 Follow-up to #33451.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33606>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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