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#! /bin/sh
set -x
own_dir="$(cd "$(dirname "$0")"; sh -c pwd)"
source "$own_dir/snippets.sh"
main_file="$1"
main_dir="$(cd "$(dirname "$main_file")" ; sh -c pwd)"
file_name="$(basename "$main_file")"
defs_file="$main_dir"/src-info-for-"$file_name"
src_file="$main_dir"/src-for-"$file_name"
# OK, [vcs] revert is always possible
new_src_file="$main_dir"/src-for-"$file_name"
forcedUrl="$2"
defs_dir="$("$own_dir"/attrset-to-dir.sh "$defs_file")"
src_defs_dir="$("$own_dir"/attrset-to-dir.sh "$src_file")"
getAttr () {
file="$defs_dir"/"$1"
data="$( ( [ -f "$file" ] && cat "$file" ) || echo "$2" )"
echo "attribute $1 obtained as: [[$data]]" >&2
echo "$data"
}
if [ -z "$forcedUrl" ] ; then
freshUrl="$("$own_dir"/urls-from-page.sh "$(getAttr downloadPage)" |
eval "egrep \"$(getAttr sourceRegexp '.*[.]tar[.].*')\"" |
eval "$(getAttr choiceCommand 'head -1')")"
if ! egrep ':' freshUrl ; then
freshUrl="$(dirname "$(getAttr downloadPage).")/$freshUrl"
fi
echo "Found download link: $freshUrl" >&2
else
freshUrl="$forcedUrl"
fi
if [ x"$freshUrl" = x"$(cat "$src_defs_dir"/advertisedUrl)" ]; then
echo "Source link not changed" >&2
exit
fi
version="$(echo "$freshUrl" |
eval "sed -re \"$(getAttr versionExtractorSedScript \
's/.*-([0-9.]+)[.].*/\1/')\"")"
mirrorUrl="$(echo "$freshUrl" |
eval "sed -r -e \"$(getAttr versionReferenceCreator \
's/-([0-9.]+)[.]/-${version}./')\"" |
eval "sed -r -e \"$(getAttr mirrorSedScript)\"")"
hash=$(nix-prefetch-url "$freshUrl")
baseName="$(getAttr baseName 'unnamed-package')"
name="$baseName-$version"
advertisedUrl="$freshUrl"
url="$mirrorUrl"
extraAssignments=""
for i in $(getAttr extraVars ''); do
eval "$(getAttr "eval_$i" 'i=""')"
extraAssignments="$extraAssignments $i=\"$(eval echo \"\$$i\")\";"
done
cat << EOF > "$new_src_file"
rec {
advertisedUrl="$advertisedUrl";
version = "$version";
url="$url";
hash = "$hash";
name = "$name";
$extraAssignments
}
EOF
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