RFR: 8253034: Update symbol generation to accomodate Git as the SCM

[Aditya Mandaleeka]

On Mon, 14 Sep 2020 23:41:52 GMT, Joe Darcy <darcy at openjdk.org> wrote:

> The symbol generation script assumed Mercurial was being used as the SCM. This should now be updated to Git.

make/scripts/generate-symbol-data.sh line 66:

> 64: fi;
> 65:
> 66: if [ "`git status -s .`x" != "x" ] ; then

Just a suggestion: perhaps you want to use the porcelain format here instead of short?
https://git-scm.com/docs/git-status#Documentation/git-status.txt---porcelainltversiongt

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PR: https://git.openjdk.java.net/jdk/pull/161