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-rw-r--r--lib/substvars.sh106
1 files changed, 0 insertions, 106 deletions
diff --git a/lib/substvars.sh b/lib/substvars.sh
deleted file mode 100644
index d69c693..0000000
--- a/lib/substvars.sh
+++ /dev/null
@@ -1,106 +0,0 @@
-# Functions for setting and substituting variables
-#
-# Copyright (C) 2012, 2014 Patrick "P. J." McDermott
-#
-# This file is part of the ProteanOS Development Kit.
-#
-# The ProteanOS Development Kit is free software: you can redistribute
-# it and/or modify it under the terms of the GNU General Public License
-# as published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
-#
-# The ProteanOS Development Kit 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 General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with the ProteanOS Development Kit. If not, see
-# <http://www.gnu.org/licenses/>.
-
-[ "x${_SUBSTVARS_SM+set}" = 'xset' ] && return 0
-_SUBSTVARS_SM=1
-
-substvars_max_depth=50
-
-set_substvar()
-{
- local name="${1}"
- local value="${2}"
-
- # Convert variable name to lower case and validate.
- name="$(printf '%s\n' "${name}" | tr 'A-Z-' 'a-z_')"
- case "${name:- }" in
- *[!a-z0-9_]*)
- warn "$(get_msg 'substvar_invalid')" "${name}"
- return 1
- ;;
- esac
-
- # Trim leading and trailing newline characters from value.
- value="$(printf '%s\n' "${value}" | sed -n '
- H; # Store each input line in the hold space.
- ${ # At the last line of input:
- g; # Restore the hold space into the pattern space.
- s/^[\n]*//; # Remove leading newline characters.
- s/[\n]*$//; # Remove trailing newline characters.
- p; # Print the results.
- };
- ')"
-
- # Escape single quotes in value.
- value="$(printf '%s\n' "${value}" | sed "s/'/'\\\\''/g")"
-
- eval "substvar_${name}='${value}'"
-
- return 0
-}
-
-substvars()
-{
- local string="${1}"
- local depth=
- local lhs=
- local name=
- local rhs=
- local old_rhs=
- local value=
-
- # Logic inspired by that of dpkg's Dpkg::Substvars::substvars()
- # subroutine.
-
- depth=0
-
- while :; do
- lhs="${string%%\$\{*}"
- if [ ${#lhs} -eq ${#string} ]; then
- # No "${" was found.
- break
- fi
- string="${string#*\$\{}"
- name="${string%%\}*}"
- rhs="${string#*\}}"
-
- if [ ${#rhs} -lt ${#old_rhs} ]; then
- # Reset the nesting counter if we've advanced the right
- # side of the matched space.
- depth=0
- fi
- if [ ${depth} -ge ${substvars_max_depth} ]; then
- # Warn of possible recursion.
- warn "$(get_msg 'substvar_deep_nesting')"
- return 1
- fi
- old_rhs="${rhs}"
-
- # Perform the substitution.
- name="$(printf '%s\n' "${name}" | tr 'A-Z-' 'a-z_')"
- value="$(eval "printf '%s\n' \"\${substvar_${name}}\"")"
- string="${lhs}${value}${rhs}"
- depth=$(($depth + 1))
- done
-
- printf '%s\n' "${string}"
-
- return 0
-}