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
|
source $stdenv/setup
source $mirrorsFile
curlVersion=$(curl -V | head -1 | cut -d' ' -f2)
# Curl flags to handle redirects, not use EPSV, handle cookies for
# servers to need them during redirects, and work on SSL without a
# certificate (this isn't a security problem because we check the
# cryptographic hash of the output anyway).
curl=(
curl
--location
--max-redirs 20
--retry 3
--disable-epsv
--cookie-jar cookies
--insecure
--user-agent "curl/$curlVersion Nixpkgs/$nixpkgsVersion"
$curlOpts
$NIX_CURL_FLAGS
)
downloadedFile="$out"
if [ -n "$downloadToTemp" ]; then downloadedFile="$TMPDIR/file"; fi
tryDownload() {
local url="$1"
echo
header "trying $url"
local curlexit=18;
success=
# if we get error code 18, resume partial download
while [ $curlexit -eq 18 ]; do
# keep this inside an if statement, since on failure it doesn't abort the script
if "${curl[@]}" -C - --fail "$url" --output "$downloadedFile"; then
success=1
break
else
curlexit=$?;
fi
done
}
finish() {
local skipPostFetch="$1"
set +o noglob
if [[ $executable == "1" ]]; then
chmod +x $downloadedFile
fi
if [ -z "$skipPostFetch" ]; then
runHook postFetch
fi
exit 0
}
tryHashedMirrors() {
if test -n "$NIX_HASHED_MIRRORS"; then
hashedMirrors="$NIX_HASHED_MIRRORS"
fi
for mirror in $hashedMirrors; do
url="$mirror/$outputHashAlgo/$outputHash"
if "${curl[@]}" --retry 0 --connect-timeout "${NIX_CONNECT_TIMEOUT:-15}" \
--fail --silent --show-error --head "$url" \
--write-out "%{http_code}" --output /dev/null > code 2> log; then
tryDownload "$url"
# We skip postFetch here, because hashed-mirrors are
# already content addressed. So if $outputHash is in the
# hashed-mirror, changes from ‘postFetch’ would already be
# made. So, running postFetch will end up applying the
# change /again/, which we don’t want.
if test -n "$success"; then finish skipPostFetch; fi
else
# Be quiet about 404 errors, which we interpret as the file
# not being present on this particular mirror.
if test "$(cat code)" != 404; then
echo "error checking the existence of $url:"
cat log
fi
fi
done
}
# URL list may contain ?. No glob expansion for that, please
set -o noglob
urls2=
for url in $urls; do
if test "${url:0:9}" != "mirror://"; then
urls2="$urls2 $url"
else
url2="${url:9}"; echo "${url2/\// }" > split; read site fileName < split
#varName="mirror_$site"
varName="$site" # !!! danger of name clash, fix this
if test -z "${!varName}"; then
echo "warning: unknown mirror:// site \`$site'"
else
mirrors=${!varName}
# Allow command-line override by setting NIX_MIRRORS_$site.
varName="NIX_MIRRORS_$site"
if test -n "${!varName}"; then mirrors="${!varName}"; fi
for url3 in $mirrors; do
urls2="$urls2 $url3$fileName";
done
fi
fi
done
urls="$urls2"
# Restore globbing settings
set +o noglob
if test -n "$showURLs"; then
echo "$urls" > $out
exit 0
fi
if test -n "$preferHashedMirrors"; then
tryHashedMirrors
fi
# URL list may contain ?. No glob expansion for that, please
set -o noglob
success=
for url in $urls; do
if [ -z "$postFetch" ]; then
case "$url" in
https://github.com/*/archive/*)
echo "warning: archives from GitHub revisions should use fetchFromGitHub"
;;
https://gitlab.com/*/-/archive/*)
echo "warning: archives from GitLab revisions should use fetchFromGitLab"
;;
esac
fi
tryDownload "$url"
if test -n "$success"; then finish; fi
done
# Restore globbing settings
set +o noglob
if test -z "$preferHashedMirrors"; then
tryHashedMirrors
fi
echo "error: cannot download $name from any mirror"
exit 1
|