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build: call ipkg-remove using xargs if #args>=512

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The wildcard call to clean up luci package (luci*) can pick up over
2,300 files when the full tree is built. Running make package/luci/clean
or a second run of make package/luci/compile would fail with an
'Argument list too long' error.

To avoid that, a maybe_use_xargs function was created that runs the
command straight as usual if the number of arguments is < 512, or saves
the list in a temporary file and feeds it to xargs otherwise.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
This commit is contained in:
Eneas U de Queiroz 2020-02-20 18:29:03 -03:00 committed by Petr Štetiar
parent 40acc13ca7
commit 78d1f3ac61
1 changed files with 11 additions and 1 deletions
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12
include/package-ipkg.mk
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@ -18,10 +18,20 @@ IPKG_REMOVE:= \
IPKG_STATE_DIR:=$(TARGET_DIR)/usr/lib/opkg
# 1: command and initial arguments
# 2: arguments list
# 3: tmp filename
define maybe_use_xargs
$(if $(word 512,$(2)), \
$(file >$(3),$(2)) $(XARGS) $(1) < "$(3)"; rm "$(3)", \
$(1) $(2))
endef
# 1: package name
# 2: candidate ipk files
define remove_ipkg_files
$(if $(strip $(2)),$(IPKG_REMOVE) $(1) $(2))
$(if $(strip $(2)), \
$(call maybe_use_xargs,$(IPKG_REMOVE) $(1),$(2),$(TMP_DIR)/$(1).in))
endef
# 1: package name