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pkg-utils.mk: add utility functions find*clauses and notfirstword

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This patch adds a few utility functions to pkg-utils.mk.

Functions finddirclauses and findfileclauses help in building a find command
that skips a set of directories and performs operations on a set of files.
This pattern can for example be used to keep certain files or directories from
being stripped, or to remove certain files from a package installation.

The notfirstword function is the inverse of the 'firstword' function in make:
it returns all but the first word.

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Acked-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
This commit is contained in:
Thomas De Schampheleire 2012-06-21 19:34:49 +00:00 committed by Peter Korsgaard
parent f86391fc07
commit 75f18de67e
1 changed files with 9 additions and 0 deletions
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9
package/pkg-utils.mk
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@ -76,6 +76,15 @@ MESSAGE = echo "$(TERM_BOLD)>>> $($(PKG)_NAME) $($(PKG)_VERSION) $(1)$(TERM_RESE
TERM_BOLD := $(shell tput smso)
TERM_RESET := $(shell tput rmso)
# Utility functions for 'find'
# findfileclauses(filelist) => -name 'X' -o -name 'Y'
findfileclauses = $(call notfirstword,$(patsubst %,-o -name '%',$(1)))
# finddirclauses(base, dirlist) => -path 'base/dirX' -o -path 'base/dirY'
finddirclauses = $(call notfirstword,$(patsubst %,-o -path '$(1)/%',$(2)))
# Miscellaneous utility functions
# notfirstword(wordlist): returns all but the first word in wordlist
notfirstword = $(wordlist 2,$(words $(1)),$(1))
# Needed for the foreach loops to loop over the list of hooks, so that
# each hook call is properly separated by a newline.