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89 lines
3.1 KiB
Bash
89 lines
3.1 KiB
Bash
#
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# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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#
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#
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##
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## @fn 800-configure-features.sh
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##
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## Automatically checks all environment variables currently set and performs
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## configuration tasks related to those variabels, including installing any
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## extensions and external libraries associated with those variables to
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## GUACAMOLE_HOME. Only environment variable prefixes are considered; this
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## script is not aware of whether an extension actually uses an environment
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## variable.
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##
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##
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## Returns whether the feature associated with a particular environment
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## variable prefix has configuration values set. Only the presence of
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## environment variables having that prefix is checked. Features can also be
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## entirely enabled/disabled through setting the [PREFIX_]ENABLED variable to
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## true/false respectively, where "[PREFIX_]" is the specified environment
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## variable prefix (including trailing underscore).
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##
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## @param VAR_BASE
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## The environment variable prefix to check, including trailing underscore.
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##
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## @returns
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## Zero if the feature associated with the given environment variable
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## prefix is enabled, non-zero otherwise.
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##
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is_feature_enabled() {
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local VAR_BASE="$1"
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# Allow any feature to be explicitly enabled/disabled using a
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# [PREFIX_]ENABLED variable
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local ENABLED_VAR="${VAR_BASE}ENABLED"
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if [ "${!ENABLED_VAR}" = "true" ]; then
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return 0
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elif [ "${!ENABLED_VAR}" = "false" ]; then
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return 1
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fi
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# Lacking an explicit request to enable/disable the feature, rely on
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# implicit enable/disable via presence of any other variables having the
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# given prefix
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awk 'BEGIN{for(v in ENVIRON) print v}' | grep "^${VAR_BASE}" > /dev/null
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}
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# Search environment for enabled extensions/features based on environment
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# variable prefixes
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for VAR_BASE in /opt/guacamole/environment/*; do
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# Skip any directories without at least one corresponding environment
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# variable set
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is_feature_enabled "$(basename "$VAR_BASE")" || continue
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# Execute any associated configuration script
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[ ! -e "$VAR_BASE/configure.sh" ] || source "$VAR_BASE/configure.sh"
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# Add any required links for extensions/libraries associated with the
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# configured extension
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for SUBDIR in lib extensions; do
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if [ -d "$VAR_BASE/$SUBDIR" ]; then
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mkdir -p "$GUACAMOLE_HOME/$SUBDIR/"
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ln -s "$VAR_BASE/$SUBDIR"/* "$GUACAMOLE_HOME/$SUBDIR/"
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fi
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done
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done
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