blob: 94c6b1ec6945cca85fb159f400e3237f0583bb5e (
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
|
#! /usr/bin/env bash
set -e
url=$1
rev=$2
expHash=$3
hashType="${NIX_HASH_ALGO:-sha256}"
hashFormat=${hashFormat:-"--base32"}
rev="${rev:-tip}"
LOG() {
echo "$@" >&2
}
die() {
LOG "$@"
exit 1
}
if [[ -z "$url" || "$url" == "--help" ]]; then
die "Usage: nix-prefetch-hg URL [rev [EXPECTED-HASH]]"
fi
if [[ "${fetchSubrepos:-0}" == 1 ]]; then
subrepoClause=S
else
subrepoClause=
fi
# If the hash was given, a file with that hash may already be in the
# store.
if [[ -n "$expHash" ]]; then
finalPath=$(nix-store --print-fixed-path --recursive "$hashType" "$expHash" hg-archive)
if ! nix-store --check-validity "$finalPath" 2> /dev/null; then
finalPath=
fi
hash="$expHash"
fi
# If we don't know the hash or a path with that hash doesn't exist,
# download the file and add it to the store.
if [[ -z "$finalPath" ]]; then
tmpPath="$(mktemp -d "${TMPDIR:-/tmp}/hg-checkout-tmp-XXXXXXXX")"
cleanup() { x=$?; rm -rf "$tmpPath"; exit $x; }; trap cleanup EXIT
tmpArchive="$tmpPath/hg-archive"
# Perform the checkout.
if [[ "$url" != /* ]]; then
tmpClone="$tmpPath/hg-clone"
hg clone -q -y -U "$url" "$tmpClone" >&2
else
tmpClone=$url
fi
hg archive -q$subrepoClause -y -r "$rev" --cwd "$tmpClone" "$tmpArchive"
rm -f "$tmpArchive/.hg_archival.txt"
LOG "hg revision is $(cd "$tmpClone"; hg id -r "$rev" -i)"
# Compute the hash.
hash=$(nix-hash --type "$hashType" "$hashFormat" "$tmpArchive")
if [[ -z "$QUIET" ]]; then LOG "hash is $hash"; fi
# Add the downloaded file to the Nix store.
finalPath=$(nix-store --add-fixed --recursive "$hashType" "$tmpArchive")
if [[ -n "$expHash" && "$expHash" != "$hash" ]]; then
die "ERROR: hash mismatch for URL \`$url'"
fi
fi
if [[ -z "$QUIET" ]]; then LOG "path is $finalPath"; fi
echo "$hash"
if [[ -n "$PRINT_PATH" ]]; then
echo "$finalPath"
fi
|