summaryrefslogtreecommitdiffstats
path: root/contrib/rankmirrors.sh.in
blob: 453ebfbe6fea399279bef8010356c38cc950958a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
#!/bin/bash
#
#   rankmirrors - read a list of mirrors from a file and rank them by speed
#   @configure_input@
#
#   Copyright (c) 2009 Matthew Bruenig <matthewbruenig@gmail.com>
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 3 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program.  If not, see <http://www.gnu.org/licenses/>.

# traps interrupt key to spit out pre-interrupt info
trap finaloutput INT

declare -r myname='rankmirrors'
declare -r myver='@PACKAGE_VERSION@'

usage() {
	echo "${myname} (pacman) v${myver}"
	echo
	echo "Ranks pacman mirrors by their connection and opening speed. Pacman mirror"
	echo "files are located in @sysconfdir@/pacman.d/. It can also rank one mirror if the URL is"
	echo "provided."
	echo
	echo "Usage: ${myname} [options] MIRRORFILE | URL"
	echo
	echo "Options:"
	echo "  --version      show program's version number and exit"
	echo "  -h, --help     show this help message and exit"
	echo "  -n NUM         number of servers to output, 0 for all"
	echo "  -t, --times    only output mirrors and their response times"
	echo "  -u, --url      test a specific URL"
	echo "  -v, --verbose  be verbose in ouptut"
	echo "  -r, --repo     specify a repository name instead of guessing"
	exit 0
}

version() {
	echo "${myname} (pacman) ${myver}"
	echo "Copyright (c) 2009 Matthew Bruenig <matthewbruenig@gmail.com>."
	echo
	echo "This is free software; see the source for copying conditions."
	echo "There is NO WARRANTY, to the extent permitted by law."
	exit 0
}

err() {
	echo "$1" >&2
	exit 1
}

# gettime fetchurl (e.g gettime http://foo.com/core/os/i686/core.db.tar.gz)
# returns the fetching time, or timeout, or unreachable
gettime() {
	IFS=' ' output=( $(curl -s -m 10 -w "%{time_total} %{http_code}" "$1" -o/dev/null) )
	(( $? == 28 )) && echo timeout && return
	(( ${output[1]} >= 400 || ! ${output[1]} )) && echo unreachable && return
	echo "${output[0]}"
}

# getfetchurl serverurl (e.g. getturl http://foo.com/core/os/i686)
# if $repo is in the line, then assumes core
# if $arch is in the line, then assumes $(uname -m)
# returns a fetchurl (e.g. http://foo.com/core/os/i686/core.db.tar.gz)
ARCH="$(uname -m)"
getfetchurl() {
	local strippedurl="${1%/}"

	local replacedurl="${strippedurl//'$arch'/$ARCH}"
	if [[ ! $TARGETREPO ]]; then
		replacedurl="${replacedurl//'$repo'/core}"
		local tmp="${replacedurl%/*}"
		tmp="${tmp%/*}"

		local reponame="${tmp##*/}"
	else
		replacedurl="${replacedurl//'$repo'/$TARGETREPO}"
		local reponame="$TARGETREPO"
	fi

	if [[ -z $reponame || $reponame = $replacedurl ]]; then
		echo "fail"
	else
		local fetchurl="${replacedurl}/$reponame.db"
		echo "$fetchurl"
	fi
}

# This exists to remove the need for a separate interrupt function
finaloutput() {
	IFS=$'\n' read -r -d '' -a sortedarray < \
		<(printf '%s\n' "${timesarray[@]}" | LC_COLLATE=C sort)

	# Final output for mirrorfile
	numiterator="0"
	if [[ $TIMESONLY ]]; then
		echo
		echo " Servers sorted by time (seconds):"
		for line in "${sortedarray[@]}"; do
			echo "${line#* } : ${line% *}"
			((numiterator++))
			(( NUM && numiterator >= NUM )) && break
		done
	else
		for line in "${sortedarray[@]}"; do
			echo "Server = ${line#* }"
			((numiterator++))
			(( NUM && numiterator >= NUM )) && break
		done
	fi
	exit 0
}


# Argument parsing
[[ $1 ]] || usage
while [[ $1 ]]; do
	if [[ ${1:0:2} = -- ]]; then
		case "${1:2}" in
			help) usage ;;
			version) version ;;
			times) TIMESONLY=1 ; shift ;;
			verbose) VERBOSE=1 ; shift ;;
			url)
				CHECKURL=1;
				[[ $2 ]] || err "Must specify URL.";
				URL="$2";
				shift 2;;
			repo)
				[[ $2 ]] || err "Must specify repository name.";
				TARGETREPO="$2";
				shift 2;;
			*) err "'$1' is an invalid argument."
		esac
	elif [[ ${1:0:1} = - ]]; then

		if [[ ! ${1:1:1} ]]; then
			[[ -t 0 ]] && err "Stdin is empty."
			IFS=$'\n' linearray=( $(</dev/stdin) )
			STDIN=1
			shift
		else
			snum=1
			for ((i=1 ; i<${#1}; i++)); do
				case ${1:$i:1} in
					h) usage ;;
					t) TIMESONLY=1 ;;
					v) VERBOSE=1 ;;
					u)
						CHECKURL=1;
						[[ $2 ]] || err "Must specify URL.";
						URL="$2";
						snum=2;;
					r)
						[[ $2 ]] || err "Must specify repository name.";
						TARGETREPO="$2";
						snum=2;;
					n)
						[[ $2 ]] || err "Must specify number.";
						NUM="$2";
						snum=2;;
					*) err "'$1' is an invalid argument." ;;
				esac
			done
			shift $snum
		fi
	elif [[ -f $1 ]]; then
		FILE="1"
		IFS=$'\n' linearray=( $(<$1) )
		[[ $linearray ]] || err "File is empty."
		shift
	else
		err "'$1' does not exist."
	fi
done

# Some sanity checks
[[ $NUM ]] || NUM=0
[[ $FILE && $CHECKURL ]] && err "Cannot specify a URL and mirrorfile."
[[ $FILE || $CHECKURL || $STDIN ]] || err "Must specify URL, mirrorfile, or stdin."

# Single URL handling
if [[ $CHECKURL ]]; then
	url="$(getfetchurl "$URL")"
	[[ $url = fail ]] && err "URL '$URL' is malformed."
	[[ $VERBOSE ]] && echo "Testing $url..."
	time=$(gettime "$url")
	echo "$URL : $time"
	exit 0
fi

# Get URL results from mirrorfile, fill up the array, and so on
if [[ $TIMESONLY ]]; then
	echo "Querying servers. This may take some time..."
elif [[ $FILE ]]; then
	echo "# Server list generated by rankmirrors on $(date +%Y-%m-%d)"
fi

timesarray=()
for line in "${linearray[@]}"; do
	if [[ $line =~ ^[[:space:]]*# ]]; then
		[[ $TIMESONLY ]] || echo $line
	elif [[ $line =~ ^[[:space:]]*Server ]]; then

		# Getting values and times and such
		server="${line#*= }"
		server="${server%%#*}"
		url="$(getfetchurl "$server")"
		[[ $url = fail ]] && err "URL '$URL' is malformed."
		time=$(gettime "$url")
		timesarray+=("$time $server")

		# Output
		if [[ $VERBOSE && $TIMESONLY ]]; then
			echo "$server ... $time"
		elif [[ $VERBOSE ]]; then
			echo "# $server ... $time"
		elif [[ $TIMESONLY ]]; then
			echo -n "   *"
		fi
	fi
done
finaloutput

# vim: set ts=2 sw=2 noet: