prereq-build: replace relative symlinks only if broken

Some programs installed to staging_dir/host/bin
also install some symlinks to itself
for an alternative name.

Some of those new symlinks are overwriting
symlinks that were installed by prereq stage.

If prereq stage were to somehow be run again,
it should not be overwriting symlinks
that point to programs that are already built.

To filter that out, catch all symlinks
after first catching all symlinks
that have an absolute target
after all other cases in the case statement,
make sure it is not broken, and if so exit successfully.

Suggested-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Signed-off-by: Michael Pratt <mcpratt@pm.me>
This commit is contained in:
Michael Pratt 2023-05-29 05:38:33 -04:00 committed by Petr Štetiar
parent 729909c07f
commit b890e2fbf9
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GPG Key ID: 58EE120F30CC02D3

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@ -114,6 +114,11 @@ define SetupHostCommand
find "$(STAGING_DIR_HOST)/stamp" | grep $(strip $(1)) && \
[ -x "$(STAGING_DIR_HOST)/bin/$(strip $(1))" ] && exit 0 \
;; \
*" -> /"*) \
;; \
*" -> "*) \
[ -x "$(STAGING_DIR_HOST)/bin/$(strip $(1))" ] && exit 0 \
;; \
esac; \
ln -sf "$$$$$$$$bin" "$(STAGING_DIR_HOST)/bin/$(strip $(1))"; \
exit 1; \