03804bb996
promote-to-main.sh checks out main. The tooling lives only on the site branch,
so that checkout removes tools/promote-to-main.sh while the script is still
running - and bash reads a script lazily, by file offset, so it would carry on
executing whatever bytes happen to land there. While manipulating branches.
Not theoretical: main does not have tools/ right now, so the first real use
would have hit it.
Both versions now copy themselves to a temp file and re-exec from there. The
bash copy unlinks itself immediately, since the open handle keeps working. The
Windows copy has the same hazard for the same reason - cmd.exe re-seeks the
batch file after every command - and two extra traps worth naming: the copy runs
from %TEMP%, so the repository root has to travel with it rather than being
derived from %~dp0, and %errorlevel% inside a parenthesised block is expanded
when the block is PARSED, before the call it is meant to report on.
Scope: product
(cherry picked from commit 6d42110a91)
5.5 KiB
5.5 KiB