import Foundation
let pattern = ##"^((\s+|)(\/\/|#)|$)"##
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = ###################################################################"""
##################################################################
#### /etc/apt/apt.conf.d/50unattended-upgrades ###
// Automatically upgrade packages from these (origin:archive) pairs
//
// Note that in Ubuntu security updates may pull in new dependencies
// from non-security sources (e.g. chromium). By allowing the release
// pocket these get automatically pulled in.
Unattended-Upgrade::Allowed-Origins {
"${distro_id}:${distro_codename}";
"${distro_id}:${distro_codename}-security";
// Extended Security Maintenance; doesn't necessarily exist for
// every release and this system may not have it installed, but if
// available, the policy for updates is such that unattended-upgrades
// should also install from here by default.
"${distro_id}ESMApps:${distro_codename}-apps-security";
"${distro_id}ESM:${distro_codename}-infra-security";
// "${distro_id}:${distro_codename}-updates";
// "${distro_id}:${distro_codename}-proposed";
// "${distro_id}:${distro_codename}-backports";
};
// Python regular expressions, matching packages to exclude from upgrading
Unattended-Upgrade::Package-Blacklist {
// The following matches all packages starting with linux-
// "linux-";
// Use $ to explicitely define the end of a package name. Without
// the $, "libc6" would match all of them.
// "libc6$";
// "libc6-dev$";
// "libc6-i686$";
// Special characters need escaping
// "libstdc\+\+6$";
// The following matches packages like xen-system-amd64, xen-utils-4.1,
// xenstore-utils and libxenstore3.0
// "(lib)?xen(store)?";
// For more information about Python regular expressions, see
// https://docs.python.org/3/howto/regex.html
};
// This option controls whether the development release of Ubuntu will be
// upgraded automatically. Valid values are "true", "false", and "auto".
Unattended-Upgrade::DevRelease "auto";
##################################################################
#### /etc/cron.weekly/man-db ###
#!/bin/sh
#
# man-db cron weekly
set -e
if [ -d /run/systemd/system ]; then
# Skip in favour of systemd timer.
exit 0
fi
iosched_idle=
# Don't try to change I/O priority in a vserver or OpenVZ.
if ! egrep -q '(envID|VxID):.*[1-9]' /proc/self/status && \
([ ! -d /proc/vz ] || [ -d /proc/bc ]); then
iosched_idle='--iosched idle'
fi
if ! [ -d /var/cache/man ]; then
# Recover from deletion, per FHS.
install -d -o man -g man -m 0755 /var/cache/man
fi
# regenerate man database
if [ -x /usr/bin/mandb ]; then
# --pidfile /dev/null so it always starts; mandb isn't really a daemon,
# but we want to start it like one.
start-stop-daemon --start --pidfile /dev/null \
--startas /usr/bin/mandb --oknodo --chuid man \
$iosched_idle \
-- --quiet
fi
exit 0
"""###################################################################
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression