[bug #63948] envsubst: Support option -s for "strict"

[Thomas Güttler]

URL:
  <https://savannah.gnu.org/bugs/?63948>

                 Summary: envsubst: Support option -s for "strict"
                   Group: GNU gettext
               Submitter: guettli
               Submitted: Mon 20 Mar 2023 01:27:27 PM UTC
                Category: Programmer tools
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any


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Follow-up Comments:


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Date: Mon 20 Mar 2023 01:27:27 PM UTC By: Thomas Güttler <guettli>
It would be nice, if envsubst would support the `-s` (strict) option. This
option makes the command fail, if a variable is not existing in the list of
environment variables.

Related tools support this. For example: 

https://github.com/kreuzwerker/envplate









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