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Adjust "wp-config.php" behavior to be skipped if configuration is not provided #206

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Merged
merged 1 commit into from
Feb 9, 2017
Merged

Adjust "wp-config.php" behavior to be skipped if configuration is not provided #206

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202 changes: 114 additions & 88 deletions docker-entrypoint.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -24,31 +24,14 @@ file_env() {
}

if [[ "$1" == apache2* ]] || [ "$1" == php-fpm ]; then
file_env 'WORDPRESS_DB_HOST' 'mysql'
# if we're linked to MySQL and thus have credentials already, let's use them
file_env 'WORDPRESS_DB_USER' "${MYSQL_ENV_MYSQL_USER:-root}"
if [ "$WORDPRESS_DB_USER" = 'root' ]; then
file_env 'WORDPRESS_DB_PASSWORD' "${MYSQL_ENV_MYSQL_ROOT_PASSWORD:-}"
else
file_env 'WORDPRESS_DB_PASSWORD' "${MYSQL_ENV_MYSQL_PASSWORD:-}"
fi
file_env 'WORDPRESS_DB_NAME' "${MYSQL_ENV_MYSQL_DATABASE:-wordpress}"
if [ -z "$WORDPRESS_DB_PASSWORD" ]; then
echo >&2 'error: missing required WORDPRESS_DB_PASSWORD environment variable'
echo >&2 ' Did you forget to -e WORDPRESS_DB_PASSWORD=... ?'
echo >&2
echo >&2 ' (Also of interest might be WORDPRESS_DB_USER and WORDPRESS_DB_NAME.)'
exit 1
fi

if ! [ -e index.php -a -e wp-includes/version.php ]; then
echo >&2 "WordPress not found in $(pwd) - copying now..."
echo >&2 "WordPress not found in $PWD - copying now..."
if [ "$(ls -A)" ]; then
echo >&2 "WARNING: $(pwd) is not empty - press Ctrl+C now if this is an error!"
echo >&2 "WARNING: $PWD is not empty - press Ctrl+C now if this is an error!"
( set -x; ls -A; sleep 10 )
fi
tar cf - --one-file-system -C /usr/src/wordpress . | tar xf -
echo >&2 "Complete! WordPress has been successfully copied to $(pwd)"
echo >&2 "Complete! WordPress has been successfully copied to $PWD"
if [ ! -e .htaccess ]; then
# NOTE: The "Indexes" option is disabled in the php:apache base image
cat > .htaccess <<-'EOF'
Expand All @@ -69,54 +52,9 @@ if [[ "$1" == apache2* ]] || [ "$1" == php-fpm ]; then

# TODO handle WordPress upgrades magically in the same way, but only if wp-includes/version.php's $wp_version is less than /usr/src/wordpress/wp-includes/version.php's $wp_version

# version 4.4.1 decided to switch to windows line endings, that breaks our seds and awks
# https://github.com/docker-library/wordpress/issues/116
# https://github.com/WordPress/WordPress/commit/1acedc542fba2482bab88ec70d4bea4b997a92e4
sed -ri -e 's/\r$//' wp-config*

if [ ! -e wp-config.php ]; then
awk '/^\/\*.*stop editing.*\*\/$/ && c == 0 { c = 1; system("cat") } { print }' wp-config-sample.php > wp-config.php <<'EOPHP'
// If we're behind a proxy server and using HTTPS, we need to alert Wordpress of that fact
// see also http://codex.wordpress.org/Administration_Over_SSL#Using_a_Reverse_Proxy
if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https') {
$_SERVER['HTTPS'] = 'on';
}

EOPHP
chown www-data:www-data wp-config.php
fi

# see http://stackoverflow.com/a/2705678/433558
sed_escape_lhs() {
echo "$@" | sed -e 's/[]\/$*.^|[]/\\&/g'
}
sed_escape_rhs() {
echo "$@" | sed -e 's/[\/&]/\\&/g'
}
php_escape() {
php -r 'var_export(('$2') $argv[1]);' -- "$1"
}
set_config() {
key="$1"
value="$2"
var_type="${3:-string}"
start="(['\"])$(sed_escape_lhs "$key")\2\s*,"
end="\);"
if [ "${key:0:1}" = '$' ]; then
start="^(\s*)$(sed_escape_lhs "$key")\s*="
end=";"
fi
sed -ri -e "s/($start\s*).*($end)$/\1$(sed_escape_rhs "$(php_escape "$value" "$var_type")")\3/" wp-config.php
}

set_config 'DB_HOST' "$WORDPRESS_DB_HOST"
set_config 'DB_USER' "$WORDPRESS_DB_USER"
set_config 'DB_PASSWORD' "$WORDPRESS_DB_PASSWORD"
set_config 'DB_NAME' "$WORDPRESS_DB_NAME"

# allow any of these "Authentication Unique Keys and Salts." to be specified via
# environment variables with a "WORDPRESS_" prefix (ie, "WORDPRESS_AUTH_KEY")
UNIQUES=(
uniqueEnvs=(
AUTH_KEY
SECURE_AUTH_KEY
LOGGED_IN_KEY
Expand All @@ -126,31 +64,110 @@ EOPHP
LOGGED_IN_SALT
NONCE_SALT
)
for unique in "${UNIQUES[@]}"; do
uniqVar="WORDPRESS_$unique"
file_env "$uniqVar"
if [ "${!uniqVar}" ]; then
set_config "$unique" "${!uniqVar}"
else
# if not specified, let's generate a random value
current_set="$(sed -rn -e "s/define\((([\'\"])$unique\2\s*,\s*)(['\"])(.*)\3\);/\4/p" wp-config.php)"
if [ "$current_set" = 'put your unique phrase here' ]; then
set_config "$unique" "$(head -c1m /dev/urandom | sha1sum | cut -d' ' -f1)"
fi
envs=(
WORDPRESS_DB_HOST
WORDPRESS_DB_USER
WORDPRESS_DB_PASSWORD
WORDPRESS_DB_NAME
"${uniqueEnvs[@]/#/WORDPRESS_}"
WORDPRESS_TABLE_PREFIX
WORDPRESS_DEBUG
)
haveConfig=
for e in "${envs[@]}"; do
file_env "$e"
if [ -z "$haveConfig" ] && [ -n "${!e}" ]; then
haveConfig=1
fi
done

file_env 'WORDPRESS_TABLE_PREFIX'
if [ "$WORDPRESS_TABLE_PREFIX" ]; then
set_config '$table_prefix' "$WORDPRESS_TABLE_PREFIX"
# linking backwards-compatibility
if [ -n "${!MYSQL_ENV_MYSQL_*}" ]; then
haveConfig=1
# host defaults to "mysql" below if unspecified
: "${WORDPRESS_DB_USER:=${MYSQL_ENV_MYSQL_USER:-root}}"
if [ "$WORDPRESS_DB_USER" = 'root' ]; then
: "${WORDPRESS_DB_PASSWORD:=${MYSQL_ENV_MYSQL_ROOT_PASSWORD:-}}"
else
: "${WORDPRESS_DB_PASSWORD:=${MYSQL_ENV_MYSQL_PASSWORD:-}}"
fi
: "${WORDPRESS_DB_NAME:=${MYSQL_ENV_MYSQL_DATABASE:-}}"
fi

file_env 'WORDPRESS_DEBUG'
if [ "$WORDPRESS_DEBUG" ]; then
set_config 'WP_DEBUG' 1 boolean
fi
# only touch "wp-config.php" if we have environment-supplied configuration values
if [ "$haveConfig" ]; then
: "${WORDPRESS_DB_HOST:=mysql}"
: "${WORDPRESS_DB_USER:=root}"
: "${WORDPRESS_DB_PASSWORD:=}"
: "${WORDPRESS_DB_NAME:=wordpress}"

# version 4.4.1 decided to switch to windows line endings, that breaks our seds and awks
# https://github.com/docker-library/wordpress/issues/116
# https://github.com/WordPress/WordPress/commit/1acedc542fba2482bab88ec70d4bea4b997a92e4
sed -ri -e 's/\r$//' wp-config*

if [ ! -e wp-config.php ]; then
awk '/^\/\*.*stop editing.*\*\/$/ && c == 0 { c = 1; system("cat") } { print }' wp-config-sample.php > wp-config.php <<'EOPHP'
// If we're behind a proxy server and using HTTPS, we need to alert Wordpress of that fact
// see also http://codex.wordpress.org/Administration_Over_SSL#Using_a_Reverse_Proxy
if (isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https') {
$_SERVER['HTTPS'] = 'on';
}

EOPHP
chown www-data:www-data wp-config.php
fi

# see http://stackoverflow.com/a/2705678/433558
sed_escape_lhs() {
echo "$@" | sed -e 's/[]\/$*.^|[]/\\&/g'
}
sed_escape_rhs() {
echo "$@" | sed -e 's/[\/&]/\\&/g'
}
php_escape() {
php -r 'var_export(('$2') $argv[1]);' -- "$1"
}
set_config() {
key="$1"
value="$2"
var_type="${3:-string}"
start="(['\"])$(sed_escape_lhs "$key")\2\s*,"
end="\);"
if [ "${key:0:1}" = '$' ]; then
start="^(\s*)$(sed_escape_lhs "$key")\s*="
end=";"
fi
sed -ri -e "s/($start\s*).*($end)$/\1$(sed_escape_rhs "$(php_escape "$value" "$var_type")")\3/" wp-config.php
}

TERM=dumb php -- "$WORDPRESS_DB_HOST" "$WORDPRESS_DB_USER" "$WORDPRESS_DB_PASSWORD" "$WORDPRESS_DB_NAME" <<'EOPHP'
set_config 'DB_HOST' "$WORDPRESS_DB_HOST"
set_config 'DB_USER' "$WORDPRESS_DB_USER"
set_config 'DB_PASSWORD' "$WORDPRESS_DB_PASSWORD"
set_config 'DB_NAME' "$WORDPRESS_DB_NAME"

for unique in "${uniqueEnvs[@]}"; do
uniqVar="WORDPRESS_$unique"
if [ -n "${!uniqVar}" ]; then
set_config "$unique" "${!uniqVar}"
else
# if not specified, let's generate a random value
currentVal="$(sed -rn -e "s/define\((([\'\"])$unique\2\s*,\s*)(['\"])(.*)\3\);/\4/p" wp-config.php)"
if [ "$currentVal" = 'put your unique phrase here' ]; then
set_config "$unique" "$(head -c1m /dev/urandom | sha1sum | cut -d' ' -f1)"
fi
fi
done

if [ "$WORDPRESS_TABLE_PREFIX" ]; then
set_config '$table_prefix' "$WORDPRESS_TABLE_PREFIX"
fi

if [ "$WORDPRESS_DEBUG" ]; then
set_config 'WP_DEBUG' 1 boolean
fi

TERM=dumb php -- <<'EOPHP'
<?php
// database might not exist, so let's try creating it (just to be safe)

Expand All @@ -160,16 +177,19 @@ $stderr = fopen('php://stderr', 'w');
// "hostname:port"
// https://codex.wordpress.org/Editing_wp-config.php#MySQL_Sockets_or_Pipes
// "hostname:unix-socket-path"
list($host, $socket) = explode(':', $argv[1], 2);
list($host, $socket) = explode(':', getenv('WORDPRESS_DB_HOST'), 2);
$port = 0;
if (is_numeric($socket)) {
$port = (int) $socket;
$socket = null;
}
$user = getenv('WORDPRESS_DB_USER');
$pass = getenv('WORDPRESS_DB_PASSWORD');
$dbName = getenv('WORDPRESS_DB_NAME');

$maxTries = 10;
do {
$mysql = new mysqli($host, $argv[2], $argv[3], '', $port, $socket);
$mysql = new mysqli($host, $user, $pass, '', $port, $socket);
if ($mysql->connect_error) {
fwrite($stderr, "\n" . 'MySQL Connection Error: (' . $mysql->connect_errno . ') ' . $mysql->connect_error . "\n");
--$maxTries;
Expand All @@ -180,14 +200,20 @@ do {
}
} while ($mysql->connect_error);

if (!$mysql->query('CREATE DATABASE IF NOT EXISTS `' . $mysql->real_escape_string($argv[4]) . '`')) {
if (!$mysql->query('CREATE DATABASE IF NOT EXISTS `' . $mysql->real_escape_string($dbName) . '`')) {
fwrite($stderr, "\n" . 'MySQL "CREATE DATABASE" Error: ' . $mysql->error . "\n");
$mysql->close();
exit(1);
}

$mysql->close();
EOPHP
fi

# now that we're definitely done writing configuration, let's clear out the relevant envrionment variables (so that stray "phpinfo()" calls don't leak secrets from our code)
for e in "${envs[@]}"; do
unset "$e"
done
fi

exec "$@"
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