我在 bash 中创建了一个函数，当我调用它时，它崩溃有unbound variable错误。我不明白，因为据说是变量不受约束的被宣布。而且，它似乎是随机触发的，比如有时在第 66 行崩溃，有时在第 76 行崩溃，有时在第 86 行崩溃。
这是函数：
#!/usr/bin/env bash
function setConfigLS() {
declare DFLT_CFG_FILE="${WEB_DOCUMENT_ROOT}/application/config/config.php"
declare DFLT_ARRAY='config'
declare cfgFile="$DFLT_CFG_FILE"
declare array="$DFLT_ARRAY"
declare value key arg
declare -a args=()
while (( $# > 0 )); do
arg="$1" && shift
case "$arg" in
--file=*)
cfgFile="${arg#*=}"
;;
-f|--file)
cfgFile="$1"
shift
;;
--value=*)
value="${arg#*=}"
;;
-v|--value)
value="$1"
shift
;;
--key=*)
key="${arg#*=}"
;;
-k|--key)
key="$1"
shift
;;
--array=*)
array="${arg#*=}"
;;
-a|--array)
array="$1"
shift
;;
-h|--help)
echo >&2 'Set a LimeSurvey configuration option.'
echo >&2 ''
echo >&2 'Usage:'
echo >&2 ' setConfigLS [options...] <KEY> <VALUE>'
echo >&2 ' setConfigLS [options...] --value=<VALUE> --key=<KEY>'
echo >&2 ''
echo >&2 'Options:'
echo >&2 ' --file, -f <CONFIG_FILE> LimeSurvey configuration file.'
echo >&2 " Default: ${DFLT_CFG_FILE}"
echo >&2 ' --array, -a <ARRAY> Name of array containing the configuration.'
echo >&2 " Default: ${DFLT_ARRAY}"
echo >&2 ' --key, --k <KEY> Key of the configuration option to set. (required)'
echo >&2 ' --value, -v <VALUE> Value of the configuration option. (required)'
echo >&2 ' --help, -h Prints this message.'
echo >&2 ''
return 0
;;
*)
args+=( "$arg" )
;;
esac
done
if [ -z "$key" ]; then # line 66: key: unbound variable
if (( ${#args} > 0 )); then
key="${args[0]}"
args=( "${args[@]:1}" )
else
echo 'Error: `--key` is required' >&2
return 1
fi
fi
if [ -z "$value" ]; then # line 76: value: unbound variable
if (( ${#args} > 0 )); then
value="${args[0]}"
args=( "${args[@]:1}" )
else
echo 'Error: `--value` is required' >&2
return 1
fi
fi
if (( ${#args} > 0 )); then # line 86: args: unbound variable
echo 'Error: too many arguments' >&2
return 1
fi
array="${array//\//\\\/}"
value="${value//$'\n'/\\$'\n'}"
ssed -Ri "$cfgFile" \
-e 's~^(\s*)('"${array}"'\s*=>\s*array\s*\()((?:\([^)]*\)|[^)])+)~\1\2\n\1 \3\n\1~'
ssed -Ri "$cfgFile" \
-e '/^\s*'"${array}"'\s*=>\s*array\s*\([^)]*$/ {
:a
n
s~^((?:\s*(?:[^,/\s]|/[^/]))+)(\s*//.*)?$~\1,\2~
s~^(\s*)//\s*('"${key//~/\\~}"'\s*=>)~\1\2~
/^\s*\)/ {
i \ '"${key}"'=>'"${value}"',
bq
}
/^\s*'"${key//\//\\\/}"'\s*=>/ {
s~>.*~>'"${value//~/\\~}"',~
bq
}
ba
:q
}'
}
我尝试更换declare value key arg为...
declare value=
declare key=
declare arg=
……但这并没有改变什么。
我有点困惑！我错过了什么？有什么我没看到的吗？
编辑1
该函数是从基于 ubuntu 18.04 的 docker 映像的入口点脚本调用的。事实上，我用这个图片。
该函数的文件被复制到/opt/docker/functions/set-config-ls.sh.
这是调用该函数的脚本：
#!/usr/bin/env bash
set -eu
declare FUNC_DIR='/opt/docker/functions'
declare APP_DIR="${WEB_DOCUMENT_ROOT}"
declare DB_SETUP_PHP="/opt/docker/db_setup.php"
source "${FUNC_DIR}/tty-loggers.sh"
source "${FUNC_DIR}/yes-no.sh"
source "${FUNC_DIR}/file-env.sh"
source "${FUNC_DIR}/set-config-ls.sh"
source "${FUNC_DIR}/env-list-vars.sh"
####################################################################
########################## Setup Variables #########################
fileEnv 'LIMESURVEY_DB_TYPE' 'mysql'
fileEnv 'LIMESURVEY_DB_HOST' 'mysql'
fileEnv 'LIMESURVEY_DB_PORT' '3306'
fileEnv 'LIMESURVEY_TABLE_PREFIX' ''
fileEnv 'LIMESURVEY_ADMIN_NAME' 'Lime Administrator'
fileEnv 'LIMESURVEY_ADMIN_EMAIL' '[email protected]'
fileEnv 'LIMESURVEY_ADMIN_USER' ''
fileEnv 'LIMESURVEY_ADMIN_PASSWORD' ''
fileEnv 'LIMESURVEY_DEBUG' '0'
fileEnv 'LIMESURVEY_SQL_DEBUG' '0'
fileEnv 'MYSQL_SSL_CA' ''
fileEnv 'LIMESURVEY_USE_INNODB' ''
# if we're linked to MySQL and thus have credentials already, let's use them
fileEnv 'LIMESURVEY_DB_NAME' "${MYSQL_ENV_MYSQL_DATABASE:-limesurvey}"
fileEnv 'LIMESURVEY_DB_USER' "${MYSQL_ENV_MYSQL_USER:-root}"
if [ "${LIMESURVEY_DB_USER}" = 'root' ]; then
fileEnv 'LIMESURVEY_DB_PASSWORD' "${MYSQL_ENV_MYSQL_ROOT_PASSWORD:-}"
else
fileEnv 'LIMESURVEY_DB_PASSWORD' "${MYSQL_ENV_MYSQL_PASSWORD:-}"
fi
if [ -z "${LIMESURVEY_DB_PASSWORD}" ]; then
logError 'error: missing required LIMESURVEY_DB_PASSWORD environment variable' >&2
logError ' Did you forget to -e LIMESURVEY_DB_PASSWORD=... ?' >&2
logError '' >&2
logError ' (Also of interest might be LIMESURVEY_DB_USER and LIMESURVEY_DB_NAME.)' >&2
exit 1
fi
declare -A CONNECTION_STRINGS=(
[mysql]="mysql:host=${LIMESURVEY_DB_HOST};port=${LIMESURVEY_DB_PORT};dbname=${LIMESURVEY_DB_NAME};"
[dblib]="dblib:host=${LIMESURVEY_DB_HOST};dbname=${LIMESURVEY_DB_NAME}"
[pgsql]="pgsql:host=${LIMESURVEY_DB_HOST};port=${LIMESURVEY_DB_PORT};user=${LIMESURVEY_DB_USER};password=${LIMESURVEY_DB_PASSWORD};dbname=${LIMESURVEY_DB_NAME};"
[sqlsrv]="sqlsrv:Server=${LIMESURVEY_DB_HOST};Database=${LIMESURVEY_DB_NAME}"
)
if [ -z "${CONNECTION_STRINGS[${LIMESURVEY_DB_TYPE}]}" ]; then
logError "error: invalid database type: ${LIMESURVEY_DB_TYPE}" >&2
logError " LIMESURVEY_DB_TYPE must be either \"mysql\", \"dblib\", \"pgsql\" or \"sqlsrv\"." >&2
exit 1
fi
####################################################################
######################## Download LimeSurvey #######################
if [ ! -f "${APP_DIR}/.RELEASE_${LIMESURVEY_GIT_RELEASE}" ] || isYes "${LIMESURVEY_FORCE_FETCH}"; then
find "$APP_DIR" -maxdepth 1 -type f -name '.RELEASE_*' -delete
logInfo "Retrieving LimeSurvey... (this operation may take a while)" >&2
wget -O "/tmp/lime.tar.gz" \
--progress="$( [ -t 1 ] && echo 'bar:noscroll' || echo 'dot:mega' )" \
"https://github.com/LimeSurvey/LimeSurvey/archive/${LIMESURVEY_GIT_RELEASE}.tar.gz"
logInfo "Extracting files from archive..." >&2
tar -xzf "/tmp/lime.tar.gz" \
--strip-components=1 \
--keep-newer-files \
--exclude-vcs \
--to-command='sh -c '\''
mkdir -p "$(dirname "'"${APP_DIR}"'/$TAR_FILENAME")" &&
touch "'"${APP_DIR}"'/$TAR_FILENAME" &&
dd of="'"${APP_DIR}"'/$TAR_FILENAME" >/dev/null 2>&1 &&
echo "'"${APP_DIR}"'/$TAR_FILENAME" '\' |
xargs -I '{}' touch -t 195001010000 '{}'
chown -R "${APPLICATION_USER}:${APPLICATION_GROUP}" "$APP_DIR"
rm "/tmp/lime.tar.gz"
touch ".RELEASE_${LIMESURVEY_GIT_RELEASE}"
fi
####################################################################
######################### LimeSurvey Setup #########################
# Install BaltimoreCyberTrustRoot.crt.pem
if [ ! -f "${APP_DIR}/BaltimoreCyberTrustRoot.crt.pem" ]; then
logInfo "Downloading BaltimoreCyberTrustroot.crt.pem..."
curl -fsSLo "${APP_DIR}/BaltimoreCyberTrustRoot.crt.pem" \
"https://www.digicert.com/CACerts/BaltimoreCyberTrustRoot.crt.pem"
fi
if [ ! -f "${APP_DIR}/application/config/config.php" ]; then
logWarn "No config file for LimeSurvey"
logWarn " Copying default config file..."
# Copy default config file but also allow for the addition of attributes
echo " 'attributes' => array()," |
awk '/lime_/ && c == 0 { c = 1; system("cat") } { print }' \
"${APP_DIR}/application/config/config-sample-${LIMESURVEY_DB_TYPE}.php" \
> "${APP_DIR}/application/config/config.php"
fi
# Set LimeSurvey configs
setConfigLS -a 'db' -k 'connectionString' "'${CONNECTION_STRINGS[${LIMESURVEY_DB_TYPE}]}'"
setConfigLS -a 'db' -k 'tablePrefix' "'${LIMESURVEY_TABLE_PREFIX}'"
setConfigLS -a 'db' -k 'username' "'${LIMESURVEY_DB_USER}'"
setConfigLS -a 'db' -k 'password' "'${LIMESURVEY_DB_PASSWORD}'"
setConfigLS -a 'urlManager' -k 'urlFormat' "'path'"
setConfigLS -k 'debug' "${LIMESURVEY_DEBUG}"
setConfigLS -k 'debugsql' "${LIMESURVEY_SQL_DEBUG}"
if [ -n "${MYSQL_SSL_CA}" ]; then
setConfigLS -a 'db' 'attributes' \
"array(PDO::MYSQL_ATTR_SSL_CA => '${APP_DIR//\//\\\/}\/${MYSQL_SSL_CA}',
PDO::MYSQL_ATTR_SSL_VERIFY_SERVER_CERT => false)"
fi
declare cfg key val
for ENV_VAR in $(envListVars "limesurvey\."); do
val="$(envGetValue "$ENV_VAR")"
cfg="${ENV_VAR#limesurvey.}"
cfg="${cfg%%.*}"
key="${ENV_VAR#limesurvey.*.}"
setConfigLS -a "$cfg" "$key" "$val"
done
mkdir -p "${APP_DIR}/upload/surveys"
chown -R "${APPLICATION_USER}:${APPLICATION_GROUP}" \
"${APP_DIR}/tmp" "${APP_DIR}/upload" "${APP_DIR}/application/config"
####################################################################
#################### LimeSurvey Database Setup #####################
if [ -n "${LIMESURVEY_USE_INNODB}" ]; then
# If you want to use INNODB - remove MyISAM specification from LimeSurvey code
sed -i "/ENGINE=MyISAM/s/\(ENGINE=MyISAM \)//1" \
"${APP_DIR}/application/core/db/MysqlSchema.php"
fi
logInfo "Waiting for database..." >&2
while ! curl -sL "${LIMESURVEY_DB_HOST}:${LIMESURVEY_DB_PORT:-3306}"; do sleep 1; done
DBSTATUS=$(TERM=dumb php -f "$DB_SETUP_PHP" -- \
"${LIMESURVEY_DB_HOST}" "${LIMESURVEY_DB_USER}" "${LIMESURVEY_DB_PASSWORD}" \
"${LIMESURVEY_DB_NAME}" "${LIMESURVEY_TABLE_PREFIX}" "${MYSQL_SSL_CA}" \
"${APP_DIR}") &>/dev/null
if [ "${DBSTATUS}" != "DBEXISTS" ] && [ -n "${LIMESURVEY_ADMIN_USER}" ] && [ -n "${LIMESURVEY_ADMIN_PASSWORD}" ]; then
logInfo 'Database not yet populated - installing Limesurvey database' >&2
su - "${APPLICATION_USER}" \
-c php -f "${APP_DIR}/application/commands/console.php" -- \
install "${LIMESURVEY_ADMIN_USER}" "${LIMESURVEY_ADMIN_PASSWORD}" \
"${LIMESURVEY_ADMIN_NAME}" "${LIMESURVEY_ADMIN_EMAIL}" verbose
fi
if [ -f "${APP_DIR}/application/commands/UpdateDbCommand.php" ]; then
logInfo 'Updating database...' >&2
su - "${APPLICATION_USER}" -c php "${APP_DIR}/application/commands/console.php" updatedb
else
logWarn 'WARNING: Manual database update may be required!' >&2
fi
if [ -n "${LIMESURVEY_ADMIN_USER}" ] && [ -n "${LIMESURVEY_ADMIN_PASSWORD}" ]; then
logInfo 'Updating password for admin user...' >&2
su - "${APPLICATION_USER}" \
-c php -f "${APP_DIR}/application/commands/console.php" -- \
resetpassword "${LIMESURVEY_ADMIN_USER}" "${LIMESURVEY_ADMIN_PASSWORD}"
fi
这是输出bash --version：
GNU bash, version 4.4.20(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
编辑2
我把能做的都放在github上了。这里是犯罪。
我不完全确定，但我认为如果您克隆存储库并运行启动脚本，它应该可以工作。
答案1
这不会为value,key或中的任何一个设置值arg：
declare value key arg
因此，如果未达到keyin 的分配：case
while (( $# > 0 )); do
arg="$1" && shift
case "$arg" in
--key=*)
key="${arg#*=}"
;;
thenkey在循环之后仍然会被取消设置（“未绑定”），并且由于脚本具有set -u，所以在使用它时会抛出错误。
if [ -z "$key" ]; then # line 66: key: unbound variable
将变量初始化为空字符串（与 一样declare key= value= arg=）可以消除该问题。
但是，您还可以参考以下内容args：
if [ -z "$key" ]; then # line 66: key: unbound variable
if (( ${#args} > 0 )); then
请注意，它指的是args，而不是args[@]，您正在获取数组的第零个元素的长度args，而不是其中的元素数量。但如果args为空，则第零个元素不存在，再次出现错误。