That would probably work fine for a majority of cases, where the shell script for environment setup tends to be pretty simple and explicit. It's a good-enough solution when you know enough about the shell script to trust that it will work.

But I can easily imagine (and have seen) examples where the value assigned to a relevant exported variable refers to some other shell variable that was set previously in the same file (and not necessarily exported), or is the output of some back-ticked command, or other arcane cleverness. For shell scripts like that, you really don't want this approach.

In reply to Re^2: How to change a script's environment after the script is already run, based on shell sourcing ? by graff
in thread How to change a script's environment after the script is already run, based on shell sourcing ? by ronbarak

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.