fasterthanlime/cron.daily

## cron.daily
#!/bin/sh
#
# Copyright (c) 2015 Slack Technologies. Original version from Google Chrome,
# license is below.
#
# Copyright (c) 2009 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# It creates the repository configuration file for package updates, and it
# monitors that config to see if it has been disabled by the overly aggressive
# distro upgrade process (e.g.  intrepid -> jaunty). When this situation is
# detected, the respository will be re-enabled. If the respository is disabled
# for any other reason, this won't re-enable it.
#
# This functionality can be controlled by creating the $DEFAULTS_FILE and
# setting "repo_add_once" and/or "repo_reenable_on_distupgrade" to "true" or
# "false" as desired. An empty $DEFAULTS_FILE is the same as setting both values
# to "false".

# System-wide package configuration.
DEFAULTS_FILE="/etc/default/slack"

APT_GET="`which apt-get 2> /dev/null`"
APT_CONFIG="`which apt-config 2> /dev/null`"

SOURCES_PREAMBLE="### THIS FILE IS AUTOMATICALLY CONFIGURED ###
# You may comment out this entry, but any other modifications may be lost.\n"

# sources.list setting for updates.
REPOCONFIG="deb https://packagecloud.io/slacktechnologies/slack/debian/ jessie main"

# Parse apt configuration and return requested variable value.
apt_config_val() {
  APTVAR="$1"
  if [ -x "$APT_CONFIG" ]; then
    "$APT_CONFIG" dump | sed -e "/^$APTVAR /"'!d' -e "s/^$APTVAR \"\(.*\)\".*/\1/"
  fi
}

# Install the repository signing key (see also:
# https://www.google.com/linuxrepositories/)
install_key() {
  APT_KEY="`which apt-key 2> /dev/null`"
  if [ -x "$APT_KEY" ]; then
    "$APT_KEY" add - >/dev/null 2>&1 <<KEYDATA
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.2.2 (GNU/Linux)

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=H60S
-----END PGP PUBLIC KEY BLOCK-----
KEYDATA
  fi
}

# NB: The original key we used above is the public PackageCloud
# key which we are now moving away from and moving to a key that
# Slack uses solely for Slack packages. However, in order to not
# break updates for people, we need to ship an update where we
# include both keys. In a future update, we'll remove the
# PackageCloud key.
install_new_key() {
  APT_KEY="`which apt-key 2> /dev/null`"
  if [ -x "$APT_KEY" ]; then
    "$APT_KEY" add - >/dev/null 2>&1 <<KEYDATA
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: GnuPG v1.4.11 (GNU/Linux)

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=ZPAR
-----END PGP PUBLIC KEY BLOCK-----
KEYDATA
  fi
}

# Set variables for the locations of the apt sources lists.
find_apt_sources() {
  APTDIR=$(apt_config_val Dir)
  APTETC=$(apt_config_val 'Dir::Etc')
  APT_SOURCES="$APTDIR$APTETC$(apt_config_val 'Dir::Etc::sourcelist')"
  APT_SOURCESDIR="$APTDIR$APTETC$(apt_config_val 'Dir::Etc::sourceparts')"
}

# Update the Google repository if it's not set correctly.
# Note: this doesn't necessarily enable the repository, it just makes sure the
# correct settings are available in the sources list.
# Returns:
# 0 - no update necessary
# 2 - error
update_bad_sources() {
  if [ ! "$REPOCONFIG" ]; then
    return 0
  fi

  find_apt_sources

  SOURCELIST="$APT_SOURCESDIR/slack.list"
  # Don't do anything if the file isn't there, since that probably means the
  # user disabled it.
  if [ ! -r "$SOURCELIST" ]; then
    return 0
  fi

  # Basic check for active configurations (non-blank, non-comment lines).
  ACTIVECONFIGS=$(grep -v "^[[:space:]]*\(#.*\)\?$" "$SOURCELIST" 2>/dev/null)

  # Check if the correct repository configuration is in there.
  REPOMATCH=$(grep "^[[:space:]#]*\b$REPOCONFIG\b" "$SOURCELIST" \
    2>/dev/null)

  # Check if the correct repository is disabled.
  MATCH_DISABLED=$(echo "$REPOMATCH" | grep "^[[:space:]]*#" 2>/dev/null)

  # Now figure out if we need to fix things.
  BADCONFIG=1
  if [ "$REPOMATCH" ]; then
    # If it's there and active, that's ideal, so nothing to do.
    if [ ! "$MATCH_DISABLED" ]; then
      BADCONFIG=0
    else
      # If it's not active, but neither is anything else, that's fine too.
      if [ ! "$ACTIVECONFIGS" ]; then
        BADCONFIG=0
      fi
    fi
  fi

  if [ $BADCONFIG -eq 0 ]; then
    return 0
  fi

  # At this point, either the correct configuration is completely missing, or
  # the wrong configuration is active. In that case, just abandon the mess and
  # recreate the file with the correct configuration. If there were no active
  # configurations before, create the new configuration disabled.
  DISABLE=""
  if [ ! "$ACTIVECONFIGS" ]; then
    DISABLE="#"
  fi
  printf "$SOURCES_PREAMBLE" > "$SOURCELIST"
  printf "$DISABLE$REPOCONFIG\n" >> "$SOURCELIST"
  if [ $? -eq 0 ]; then
    return 0
  fi
  return 2
}

# Add the Google repository to the apt sources.
# Returns:
# 0 - sources list was created
# 2 - error
create_sources_lists() {
  if [ ! "$REPOCONFIG" ]; then
    return 0
  fi

  find_apt_sources

  SOURCELIST="$APT_SOURCESDIR/slack.list"
  if [ -d "$APT_SOURCESDIR" ]; then
    printf "$SOURCES_PREAMBLE" > "$SOURCELIST"
    printf "$REPOCONFIG\n" >> "$SOURCELIST"
    if [ $? -eq 0 ]; then
      return 0
    fi
  fi
  return 2
}

# Remove our custom sources list file.
# Returns:
# 0 - successfully removed, or not configured
# !0 - failed to remove
clean_sources_lists() {
  if [ ! "$REPOCONFIG" ]; then
    return 0
  fi

  find_apt_sources

  rm -f "$APT_SOURCESDIR/slack.list"
}

# Detect if the repo config was disabled by distro upgrade and enable if
# necessary.
handle_distro_upgrade() {
  if [ ! "$REPOCONFIG" ]; then
    return 0
  fi

  find_apt_sources
  SOURCELIST="$APT_SOURCESDIR/slack.list"
  if [ -r "$SOURCELIST" ]; then
    REPOLINE=$(grep -E "^[[:space:]]*#[[:space:]]*$REPOCONFIG[[:space:]]*# disabled on upgrade to .*" "$SOURCELIST")
    if [ $? -eq 0 ]; then
      sed -i -e "s,^[[:space:]]*#[[:space:]]*\($REPOCONFIG\)[[:space:]]*# disabled on upgrade to .*,\1," \
        "$SOURCELIST"
      LOGGER=$(which logger 2> /dev/null)
      if [ "$LOGGER" ]; then
        "$LOGGER" -t "$0" "Reverted repository modification: $REPOLINE."
      fi
    fi
  fi
}

DEFAULT_ARCH="amd64"

get_lib_dir() {
  if [ "$DEFAULT_ARCH" = "i386" ]; then
    LIBDIR=lib/i386-linux-gnu
  elif [ "$DEFAULT_ARCH" = "amd64" ]; then
    LIBDIR=lib/x86_64-linux-gnu
  else
    echo Unknown CPU Architecture: "$DEFAULT_ARCH"
    exit 1
  fi
}

## MAIN ##
DEFAULTS_FILE="/etc/default/slack"
if [ -r "$DEFAULTS_FILE" ]; then
  . "$DEFAULTS_FILE"
else
  repo_add_once="true"
  repo_reenable_on_distupgrade="true"
  echo "repo_add_once=\"true\"\nrepo_reenable_on_distupgrade=\"true\"\n" > "$DEFAULTS_FILE"
fi

if [ "$repo_add_once" = "true" ]; then
  install_key
  install_new_key
  create_sources_lists
  RES=$?
  # Sources creation succeeded, so stop trying.
  if [ $RES -ne 2 ]; then
    sed -i -e 's/[[:space:]]*repo_add_once=.*/repo_add_once="false"/' "$DEFAULTS_FILE"
  fi
else
  update_bad_sources
fi

if [ "$repo_reenable_on_distupgrade" = "true" ]; then
  handle_distro_upgrade
  install_new_key
fi
	#!/bin/sh
	#
	# Copyright (c) 2015 Slack Technologies. Original version from Google Chrome,
	# license is below.
	#
	# Copyright (c) 2009 The Chromium Authors. All rights reserved.
	# Use of this source code is governed by a BSD-style license that can be
	# found in the LICENSE file.
	#
	# It creates the repository configuration file for package updates, and it
	# monitors that config to see if it has been disabled by the overly aggressive
	# distro upgrade process (e.g. intrepid -> jaunty). When this situation is
	# detected, the respository will be re-enabled. If the respository is disabled
	# for any other reason, this won't re-enable it.
	#
	# This functionality can be controlled by creating the $DEFAULTS_FILE and
	# setting "repo_add_once" and/or "repo_reenable_on_distupgrade" to "true" or
	# "false" as desired. An empty $DEFAULTS_FILE is the same as setting both values
	# to "false".

	# System-wide package configuration.
	DEFAULTS_FILE="/etc/default/slack"

	APT_GET="`which apt-get 2> /dev/null`"
	APT_CONFIG="`which apt-config 2> /dev/null`"

	SOURCES_PREAMBLE="### THIS FILE IS AUTOMATICALLY CONFIGURED ###
	# You may comment out this entry, but any other modifications may be lost.\n"

	# sources.list setting for updates.
	REPOCONFIG="deb https://packagecloud.io/slacktechnologies/slack/debian/ jessie main"

	# Parse apt configuration and return requested variable value.
	apt_config_val() {
	APTVAR="$1"
	if [ -x "$APT_CONFIG" ]; then
	"$APT_CONFIG" dump \| sed -e "/^$APTVAR /"'!d' -e "s/^$APTVAR \"\(.\)\"./\1/"
	fi
	}

	# Install the repository signing key (see also:
	# https://www.google.com/linuxrepositories/)
	install_key() {
	APT_KEY="`which apt-key 2> /dev/null`"
	if [ -x "$APT_KEY" ]; then
	"$APT_KEY" add - >/dev/null 2>&1 <<KEYDATA
	-----BEGIN PGP PUBLIC KEY BLOCK-----
	Version: GnuPG v1.4.2.2 (GNU/Linux)

	mQINBFLUbogBEADceEoxBDoE6QM5xV/13qiELbFIkQgy/eEi3UesXmJblFdU7wcD
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	sA==
	=H60S
	-----END PGP PUBLIC KEY BLOCK-----
	KEYDATA
	fi
	}

	# NB: The original key we used above is the public PackageCloud
	# key which we are now moving away from and moving to a key that
	# Slack uses solely for Slack packages. However, in order to not
	# break updates for people, we need to ship an update where we
	# include both keys. In a future update, we'll remove the
	# PackageCloud key.
	install_new_key() {
	APT_KEY="`which apt-key 2> /dev/null`"
	if [ -x "$APT_KEY" ]; then
	"$APT_KEY" add - >/dev/null 2>&1 <<KEYDATA
	-----BEGIN PGP PUBLIC KEY BLOCK-----
	Version: GnuPG v1.4.11 (GNU/Linux)

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	lIs=
	=ZPAR
	-----END PGP PUBLIC KEY BLOCK-----
	KEYDATA
	fi
	}

	# Set variables for the locations of the apt sources lists.
	find_apt_sources() {
	APTDIR=$(apt_config_val Dir)
	APTETC=$(apt_config_val 'Dir::Etc')
	APT_SOURCES="$APTDIR$APTETC$(apt_config_val 'Dir::Etc::sourcelist')"
	APT_SOURCESDIR="$APTDIR$APTETC$(apt_config_val 'Dir::Etc::sourceparts')"
	}

	# Update the Google repository if it's not set correctly.
	# Note: this doesn't necessarily enable the repository, it just makes sure the
	# correct settings are available in the sources list.
	# Returns:
	# 0 - no update necessary
	# 2 - error
	update_bad_sources() {
	if [ ! "$REPOCONFIG" ]; then
	return 0
	fi

	find_apt_sources

	SOURCELIST="$APT_SOURCESDIR/slack.list"
	# Don't do anything if the file isn't there, since that probably means the
	# user disabled it.
	if [ ! -r "$SOURCELIST" ]; then
	return 0
	fi

	# Basic check for active configurations (non-blank, non-comment lines).
	ACTIVECONFIGS=$(grep -v "^[[:space:]]\(#.\)\?$" "$SOURCELIST" 2>/dev/null)

	# Check if the correct repository configuration is in there.
	REPOMATCH=$(grep "^[[:space:]#]*\b$REPOCONFIG\b" "$SOURCELIST" \
	2>/dev/null)

	# Check if the correct repository is disabled.
	MATCH_DISABLED=$(echo "$REPOMATCH" \| grep "^[[:space:]]*#" 2>/dev/null)

	# Now figure out if we need to fix things.
	BADCONFIG=1
	if [ "$REPOMATCH" ]; then
	# If it's there and active, that's ideal, so nothing to do.
	if [ ! "$MATCH_DISABLED" ]; then
	BADCONFIG=0
	else
	# If it's not active, but neither is anything else, that's fine too.
	if [ ! "$ACTIVECONFIGS" ]; then
	BADCONFIG=0
	fi
	fi
	fi

	if [ $BADCONFIG -eq 0 ]; then
	return 0
	fi

	# At this point, either the correct configuration is completely missing, or
	# the wrong configuration is active. In that case, just abandon the mess and
	# recreate the file with the correct configuration. If there were no active
	# configurations before, create the new configuration disabled.
	DISABLE=""
	if [ ! "$ACTIVECONFIGS" ]; then
	DISABLE="#"
	fi
	printf "$SOURCES_PREAMBLE" > "$SOURCELIST"
	printf "$DISABLE$REPOCONFIG\n" >> "$SOURCELIST"
	if [ $? -eq 0 ]; then
	return 0
	fi
	return 2
	}

	# Add the Google repository to the apt sources.
	# Returns:
	# 0 - sources list was created
	# 2 - error
	create_sources_lists() {
	if [ ! "$REPOCONFIG" ]; then
	return 0
	fi

	find_apt_sources

	SOURCELIST="$APT_SOURCESDIR/slack.list"
	if [ -d "$APT_SOURCESDIR" ]; then
	printf "$SOURCES_PREAMBLE" > "$SOURCELIST"
	printf "$REPOCONFIG\n" >> "$SOURCELIST"
	if [ $? -eq 0 ]; then
	return 0
	fi
	fi
	return 2
	}

	# Remove our custom sources list file.
	# Returns:
	# 0 - successfully removed, or not configured
	# !0 - failed to remove
	clean_sources_lists() {
	if [ ! "$REPOCONFIG" ]; then
	return 0
	fi

	find_apt_sources

	rm -f "$APT_SOURCESDIR/slack.list"
	}

	# Detect if the repo config was disabled by distro upgrade and enable if
	# necessary.
	handle_distro_upgrade() {
	if [ ! "$REPOCONFIG" ]; then
	return 0
	fi

	find_apt_sources
	SOURCELIST="$APT_SOURCESDIR/slack.list"
	if [ -r "$SOURCELIST" ]; then
	REPOLINE=$(grep -E "^[[:space:]]#[[:space:]]$REPOCONFIG[[:space:]]# disabled on upgrade to ." "$SOURCELIST")
	if [ $? -eq 0 ]; then
	sed -i -e "s,^[[:space:]]#[[:space:]]\($REPOCONFIG\)[[:space:]]# disabled on upgrade to .,\1," \
	"$SOURCELIST"
	LOGGER=$(which logger 2> /dev/null)
	if [ "$LOGGER" ]; then
	"$LOGGER" -t "$0" "Reverted repository modification: $REPOLINE."
	fi
	fi
	fi
	}

	DEFAULT_ARCH="amd64"

	get_lib_dir() {
	if [ "$DEFAULT_ARCH" = "i386" ]; then
	LIBDIR=lib/i386-linux-gnu
	elif [ "$DEFAULT_ARCH" = "amd64" ]; then
	LIBDIR=lib/x86_64-linux-gnu
	else
	echo Unknown CPU Architecture: "$DEFAULT_ARCH"
	exit 1
	fi
	}

	## MAIN ##
	DEFAULTS_FILE="/etc/default/slack"
	if [ -r "$DEFAULTS_FILE" ]; then
	. "$DEFAULTS_FILE"
	else
	repo_add_once="true"
	repo_reenable_on_distupgrade="true"
	echo "repo_add_once=\"true\"\nrepo_reenable_on_distupgrade=\"true\"\n" > "$DEFAULTS_FILE"
	fi

	if [ "$repo_add_once" = "true" ]; then
	install_key
	install_new_key
	create_sources_lists
	RES=$?
	# Sources creation succeeded, so stop trying.
	if [ $RES -ne 2 ]; then
	sed -i -e 's/[[:space:]]repo_add_once=./repo_add_once="false"/' "$DEFAULTS_FILE"
	fi
	else
	update_bad_sources
	fi

	if [ "$repo_reenable_on_distupgrade" = "true" ]; then
	handle_distro_upgrade
	install_new_key
	fi