pyrox.dev
lol
1#! /bin/sh -e
2
3url=$1
4rev=$2
5expHash=$3
6
7hashType=$NIX_HASH_ALGO
8if test -z "$hashType"; then
9 hashType=sha256
10fi
11if test -z "$hashFormat"; then
12 hashFormat=--base32
13fi
14
15if test -z "$url"; then
16 echo "syntax: nix-prefetch-hg URL [rev [EXPECTED-HASH]]" >&2
17 exit 1
18fi
19
20if test "$fetchSubrepos" == 1; then
21 subrepoClause=S
22else
23 subrepoClause=
24fi
25
26test -n "$rev" || rev="tip"
27
28
29# If the hash was given, a file with that hash may already be in the
30# store.
31if test -n "$expHash"; then
32 finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" hg-archive)
33 if ! nix-store --check-validity "$finalPath" 2> /dev/null; then
34 finalPath=
35 fi
36 hash=$expHash
37fi
38
39
40# If we don't know the hash or a path with that hash doesn't exist,
41# download the file and add it to the store.
42if test -z "$finalPath"; then
43
44 tmpPath="$(mktemp -d "${TMPDIR:-/tmp}/hg-checkout-tmp-XXXXXXXX")"
45 trap "rm -rf \"$tmpPath\"" EXIT
46
47 tmpArchive="$tmpPath/hg-archive"
48
49 # Perform the checkout.
50 if [[ $url != /* ]]; then
51 tmpClone=$tmpPath/hg-clone
52 hg clone -q -y -U "$url" $tmpClone >&2
53 else
54 tmpClone=$url
55 fi
56 hg archive -q$subrepoClause -y -r "$rev" --cwd $tmpClone $tmpArchive
57 rm -f $tmpArchive/.hg_archival.txt
58
59 echo "hg revision is $(cd $tmpClone; hg id -r "$rev" -i)"
60
61 # Compute the hash.
62 hash=$(nix-hash --type $hashType $hashFormat $tmpArchive)
63 if ! test -n "$QUIET"; then echo "hash is $hash" >&2; fi
64
65 # Add the downloaded file to the Nix store.
66 finalPath=$(nix-store --add-fixed --recursive "$hashType" $tmpArchive)
67
68 if test -n "$expHash" -a "$expHash" != "$hash"; then
69 echo "hash mismatch for URL \`$url'"
70 exit 1
71 fi
72
73
74fi
75
76if ! test -n "$QUIET"; then echo "path is $finalPath" >&2; fi
77
78echo $hash
79
80if test -n "$PRINT_PATH"; then
81 echo $finalPath
82fi