Merge pull request #31 from asteven/issue-28

Robuster implementation of __key_value
This commit is contained in:
telmich 2012-02-10 07:16:20 -08:00
commit 1025ed5897
7 changed files with 102 additions and 71 deletions

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@ -0,0 +1,53 @@
#!/bin/sh
#
# 2011 Steven Armstrong (steven-cdist at armstrong.cc)
#
# This file is part of cdist.
#
# cdist 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.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#
key="$(cat "$__object/parameter/key" 2>/dev/null \
|| echo "$__object_id")"
state="$(cat "$__object/parameter/state" 2>/dev/null \
|| echo "present")"
file="$(cat "$__object/parameter/file")"
delimiter="$(cat "$__object/parameter/delimiter")"
value="$(cat "$__object/parameter/value" 2>/dev/null \
|| echo "__CDIST_NOTSET__")"
case "$state" in
absent)
if grep -q -E "^$key$delimiter+" "$file"; then
# if the key exists, with whatever value, we will have to remove it
# so report it as present
echo present
else
# key does not exist
echo absent
fi
;;
present)
if grep -q -E "^$key$delimiter+$value$" "$file"; then
# key exists and value is same
echo present
elif grep -q -E "^$key$delimiter+" "$file"; then
# key exists, but value is empty or different
echo wrongvalue
else
# key does not exist
echo absent
fi
;;
esac

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@ -1,37 +0,0 @@
#!/bin/sh
#
# 2011 Steven Armstrong (steven-cdist at armstrong.cc)
#
# This file is part of cdist.
#
# cdist 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.
#
# cdist 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 cdist. If not, see <http://www.gnu.org/licenses/>.
#
#
# Get the current value of key or __NOTSET__ if the key doesn't exist.
#
if [ -f "$__object/parameter/key" ]; then
key="$(cat "$__object/parameter/key")"
else
key="$__object_id"
fi
file="$(cat "$__object/parameter/file")"
delimiter="$(cat "$__object/parameter/delimiter")"
awk -F "$delimiter" '
BEGIN { found=0 }
/^'$key'/ { print $2; found=1 }
END { if (found) exit 0; else exit 1 }' "$file" \
|| echo "__NOTSET__"

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@ -18,35 +18,40 @@
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
value_is="$(cat "$__object/explorer/value")"
value_should="$(cat "$__object/parameter/value")"
key="$(cat "$__object/parameter/key")"
file="$(cat "$__object/parameter/file")"
delimiter="$(cat "$__object/parameter/delimiter")"
value="$(cat "$__object/parameter/value")"
if [ "$value_is" != "$value_should" ]; then
case "$value_is" in
__NOTSET__)
# add key and value
echo "echo \"${key}${delimiter}${value_should}\" >> \"$file\""
;;
*)
if [ "$value_should" = '__NOTSET__' ]; then
# remove key and value
cat << DONE
sed -i '/^${key}/d' "$file"
DONE
else
# change value
cat << DONE
awk -F "$delimiter" '
/${key}${delimiter}*/{gsub("$value_is", "$value_should")};{print}' "$file" > "${file}+" \
&& mv "${file}+" "$file"
state_is="$(cat "$__object/explorer/state")"
state_should="$(cat "$__object/parameter/state")"
DONE
fi
;;
esac
if [ "$state_is" = "$state_should" ]; then
# nothing to do
exit 0
fi
case "$state_should" in
absent)
# remove lines starting with key
echo "sed -i '/^$key\($delimiter\+\)/d' \"$file\""
;;
present)
case "$state_is" in
absent)
# add new key and value
echo "echo \"${key}${delimiter}${value}\" >> \"$file\""
;;
wrongvalue)
# change exisiting value
echo "sed -i \"s|^$key\($delimiter\+\).*|$key\1$value|\" \"$file\""
;;
*)
echo "Unknown explorer state: $state_is" >&2
exit 1
esac
;;
*)
echo "Unknown state: $state_should" >&2
exit 1
esac

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@ -16,9 +16,6 @@ file.
REQUIRED PARAMETERS
-------------------
value::
The value for the key. Setting the value to `__NOTSET__` will remove the key
from the file.
file::
The file to operate on.
delimiter::
@ -27,8 +24,13 @@ delimiter::
OPTIONAL PARAMETERS
-------------------
state::
present or absent, defaults to present. If present, sets the key to value,
if absent, removes the key from the file.
key::
The key to change. Defaults to object_id.
value::
The value for the key. Optional if state=absent, required otherwise.
EXAMPLES
@ -45,6 +47,9 @@ __key_value my-fancy-id --file /etc/login.defs --key SYS_UID_MAX --value 666 \
# Enable packet forwarding
__key_value net.ipv4.ip_forward --file /etc/sysctl.conf --value 1 \
--delimiter '='
# Remove existing key/value
__key_value LEGACY_KEY --file /etc/somefile --state absent --delimiter '='
--------------------------------------------------------------------------------

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@ -18,9 +18,13 @@
# along with cdist. If not, see <http://www.gnu.org/licenses/>.
#
if [ -f "$__object/parameter/key" ]; then
key="$(cat "$__object/parameter/key")"
else
echo "$__object_id" > "$__object/parameter/key"
fi
# set defaults
key="$(cat "$__object/parameter/key" 2>/dev/null \
|| echo "$__object_id" | tee "$__object/parameter/key")"
state="$(cat "$__object/parameter/state" 2>/dev/null \
|| echo "present" | tee "$__object/parameter/state")"
if [ "$state" = "present" -a ! -f "$__object/parameter/value" ]; then
echo "Missing required parameter 'value'" >&2
exit 1
fi

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@ -1 +1,3 @@
key
value
state

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@ -1,3 +1,2 @@
value
file
delimiter