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author | Luke Shumaker <lukeshu@sbcglobal.net> | 2017-01-30 18:42:31 -0500 |
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committer | Luke Shumaker <lukeshu@sbcglobal.net> | 2017-01-30 18:42:31 -0500 |
commit | 4f9203808ef9607ae27eba3cf77079bbe661fd95 (patch) | |
tree | 4bd6bd4cc388dedbbc74f2b987682b684344f023 /build-aux/Makefile.once.head/00-quote.mk | |
parent | 4abfdaa8c9fa4646f3ba7e9c1bb1f3eb47061f9d (diff) | |
parent | 16e8d3b92b5e35a5eaee40a7b7fc0279c342886a (diff) |
Merge remote-tracking branch 'autothing/v3/master'
Diffstat (limited to 'build-aux/Makefile.once.head/00-quote.mk')
-rw-r--r-- | build-aux/Makefile.once.head/00-quote.mk | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/build-aux/Makefile.once.head/00-quote.mk b/build-aux/Makefile.once.head/00-quote.mk new file mode 100644 index 0000000..94bc943 --- /dev/null +++ b/build-aux/Makefile.once.head/00-quote.mk @@ -0,0 +1,49 @@ +# Copyright (C) 2016 Luke Shumaker +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU Affero General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU Affero General Public License for more details. +# +# You should have received a copy of the GNU Affero General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. + +mod.quote.description = Macros to quote tricky strings +define mod.quote.doc +# Inputs: +# (none) +# Outputs: +# - Global variable: `quote.var` : GNU Make variables +# - Global variable: `quote.pattern` : GNU Make patterns +# - Global variable: `quote.ere` : POSIX Extended Regular Expressions +# - Global variable: `quote.bre` : POSIX Basic Regular Expressions +# - Global variable: `quote.shell` : POSIX sh(1) strings +# - Global variable: `quote.shell-each`: POSIX sh(1) strings +# +# Escaping/quoting things is hard! This module provides a number of +# functions to escape/quote strings for various contexts. +# +# `quote.shell-each` quotes each list-item separately (munging +# whitespace), while `quote.shell` keeps them as one string (preserving +# whitespace). +endef +mod.quote.doc := $(value mod.quote.doc) + +_quote.backslash = $(if $1,$(call _quote.backslash,$(wordlist 2,$(words $1),$1),$(subst $(firstword $1),\$(firstword $1),$2)),$2) + +quote.var = $(subst $(at.nl),\$(at.nl),$(subst $$,$$$$,$1)) +quote.pattern = $(call _quote.backslash, \ % ,$1) +quote.ere = $(call _quote.backslash, \ ^ . [ $$ ( ) | * + ? { ,$1) +quote.bre = $(call _quote.backslash, \ ^ . [ $$ * ,$1) + +quote.shell-each = $(foreach _quote.tmp,$1,$(call quote.shell,$(_quote.tmp))) + +# I put this as the last line in the file because it confuses Emacs +# syntax highlighting and makes the remainder of the file difficult to +# edit. +quote.shell = $(subst $(at.nl),'$$'\n'','$(subst ','\'',$1)') |