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zimbatm.tngl.sh
1#! /bin/sh -e
2
3usage(){
4 echo >&2 "syntax: nix-prefetch-zip [OPTIONS] [URL [EXPECTED-HASH]]
5
6Options:
7 --url url The url of the archive to fetch.
8 --name name The name to use for the store path (defaults to \`basename \$url\`).
9 --ext ext The file extension (.zip, .tar.gz, ...) to be REMOVED from name
10 --hash hash The hash of unpacked archive.
11 --hash-type type Use the specified cryptographic hash algorithm, which can be one of md5, sha1, and sha256.
12 --leave-root Keep the root directory of the archive.
13 --help Show this help text.
14"
15 exit 1
16}
17
18
19name=""
20ext=""
21argi=0
22argfun=""
23for arg; do
24 if test -z "$argfun"; then
25 case $arg in
26 --url) argfun=set_url;;
27 --name) argfun=set_name;;
28 --ext) argfun=set_ext;;
29 --hash) argfun=set_expHash;;
30 --hash-type) argfun=set_hashType;;
31 --leave-root) leaveRoot=true;;
32 --help) usage;;
33 *) argi=$(($argi + 1))
34 case $argi in
35 1) url=$arg;;
36 2) rev=$arg;;
37 3) expHash=$arg;;
38 *) echo "Unexpected argument: $arg" >&2
39 usage
40 ;;
41 esac
42 ;;
43 esac
44 else
45 case $argfun in
46 set_*)
47 var=$(echo $argfun | sed 's,^set_,,')
48 eval "$var=\$arg"
49 ;;
50 esac
51 argfun=""
52 fi
53done
54
55if [ -z "$url" ]; then
56 echo "Error: No --url flag given" >&2
57 usage
58fi
59
60if [ -z "$name" ]; then
61 name=$(basename "$url")
62fi
63
64if test -z "$hashType"; then
65 hashType=sha256
66fi
67
68hashFormat="--base32"
69
70tmp=$(mktemp -d 2>/dev/null || mktemp -d -t "$$")
71trap "rm -rf '$tmp'" EXIT
72
73dirname=$(basename -s "$ext" "$name")
74
75unpackDirTmp=$tmp/unpacked-tmp/$dirname
76mkdir -p $unpackDirTmp
77
78unpackDir=$tmp/unpacked/$dirname
79mkdir -p $unpackDir
80
81downloadedFile=$tmp/$(basename "$url")
82
83unpackFile() {
84 local curSrc="$1"
85
86 case "$curSrc" in
87 *.tar.xz | *.tar.lzma)
88 # Don't rely on tar knowing about .xz.
89 xz -d < $curSrc | tar xf -
90 ;;
91 *.tar | *.tar.* | *.tgz | *.tbz2)
92 # GNU tar can automatically select the decompression method
93 # (info "(tar) gzip").
94 tar xf $curSrc
95 ;;
96 *.zip)
97 unzip -qq $curSrc
98 ;;
99 *)
100 echo "source archive $curSrc has unknown type" >&2
101 exit 1
102 ;;
103 esac
104}
105
106# If the hash was given, a file with that hash may already be in the
107# store.
108if test -n "$expHash"; then
109 finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" "$name")
110 if ! nix-store --check-validity "$finalPath" 2> /dev/null; then
111 finalPath=
112 fi
113 hash=$expHash
114fi
115
116# If we don't know the hash or a path with that hash doesn't exist,
117# download the file and add it to the store.
118if test -z "$finalPath"; then
119 curl="curl \
120 --location --max-redirs 20 \
121 --disable-epsv \
122 --insecure"
123
124 if ! $curl --fail "$url" --output "$downloadedFile"; then
125 echo "error: could not download $url" >&2
126 exit 1
127 fi
128
129 if [ -z "$leaveRoot" ]; then
130 shopt -s dotglob
131
132 cd "$unpackDirTmp"
133 unpackFile "$downloadedFile"
134
135 if [ $(ls "$unpackDirTmp" | wc -l) != 1 ]; then
136 echo "error: zip file must contain a single file or directory."
137 exit 1
138 fi
139
140 fn=$(cd "$unpackDirTmp" && echo *)
141
142 if [ -f "$unpackDirTmp/$fn" ]; then
143 mv "$unpackDirTmp/$fn" "$unpackDir"
144 else
145 mv "$unpackDirTmp/$fn/"* "$unpackDir/"
146 fi
147 else
148 cd $unpackDir
149 unpackFile "$downloadedFile"
150 fi
151
152 # Compute the hash.
153 hash=$(nix-hash --type $hashType $hashFormat $unpackDir)
154 if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
155
156 # Add the downloaded file to the Nix store.
157 finalPath=$(nix-store --add-fixed --recursive "$hashType" $unpackDir)
158
159 if test -n "$expHash" -a "$expHash" != "$hash"; then
160 echo "hash mismatch for URL \`$url'"
161 exit 1
162 fi
163fi
164
165if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi
166
167echo $hash
168
169if test -n "$PRINT_PATH"; then
170 echo $finalPath
171fi