nixpkgs/pkgs/build-support/upstream-updater/update-walker.sh

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#! /bin/sh
own_dir="$(cd "$(dirname "$0")"; pwd)"
CURRENT_URL=
url () {
CURRENT_URL="$1"
}
version_unpack () {
sed -re '
s/[.]/ /g;
s@/@ / @g
s/-(rc|pre)/ -1 \1 /g;
s/-(gamma)/ -2 \1 /g;
s/-(beta)/ -3 \1 /g;
s/-(alpha)/ -4 \1 /g;
s/[-]/ - /g;
'
}
version_repack () {
sed -re '
s/ - /-/g;
s/ -[0-9]+ ([a-z]+) /-\1/g;
s@ / @/@g
s/ /./g;
'
}
version_sort () {
version_unpack |
sort -t ' ' -n $(for i in $(seq 30); do echo " -k${i}n" ; done) | tac |
version_repack
}
position_choice () {
head -n "${1:-1}" | tail -n "${2:-1}"
}
matching_links () {
"$own_dir"/urls-from-page.sh "$CURRENT_URL" | grep -E "$1"
}
link () {
CURRENT_URL="$(matching_links "$1" | position_choice "$2" "$3")"
echo "Linked by: $*"
echo "URL: $CURRENT_URL" >&2
}
version_link () {
CURRENT_URL="$(matching_links "$1" | version_sort | position_choice "$2" "$3")"
echo "Linked version by: $*"
echo "URL: $CURRENT_URL" >&2
}
redirect () {
CURRENT_URL="$(curl -I -L --max-redirs "${1:-99}" "$CURRENT_URL" |
grep -E '^Location: ' | position_choice "${2:-999999}" "$3" |
sed -e 's/^Location: //; s/\r//')"
echo "Redirected: $*"
echo "URL: $CURRENT_URL" >&2
}
replace () {
sed -re "s $1 $2 g"
}
process () {
CURRENT_URL="$(echo "$CURRENT_URL" | replace "$1" "$2")"
echo "Processed: $*"
echo "URL: $CURRENT_URL" >&2
}
version () {
CURRENT_VERSION="$(echo "$CURRENT_URL" | replace "$1" "$2")"
echo "Version: $CURRENT_VERSION" >&2
}
ensure_version () {
[ -z "$CURRENT_VERSION" ] && version '.*-([0-9.]+)[-._].*' '\1'
}
ensure_target () {
[ -z "$CURRENT_TARGET" ] && target default.nix
}
hash () {
CURRENT_HASH="$(nix-prefetch-url "$CURRENT_URL")"
}
name () {
CURRENT_NAME="$1"
}
retrieve_version () {
PACKAGED_VERSION="$(nix-instantiate --eval-only '<nixpkgs>' -A "$CURRENT_NAME".meta.version | xargs)"
}
directory_of () {
cd "$(dirname "$1")"; pwd
}
full_path () {
echo "$(directory_of "$1")/$(basename "$1")"
}
target () {
CURRENT_TARGET="$1"
test -e "$CURRENT_TARGET" ||
{ [ "$CURRENT_TARGET" = "${CURRENT_TARGET#/}" ] && CURRENT_TARGET="$CONFIG_DIR/$CURRENT_TARGET"; }
echo "Target set to: $CURRENT_TARGET"
}
marker () {
BEGIN_EXPRESSION="$1"
}
update_found () {
echo "Compare: $CURRENT_VERSION vs $PACKAGED_VERSION"
[ "$CURRENT_VERSION" != "$PACKAGED_VERSION" ]
}
do_write_expression () {
echo "${1}rec {"
echo "${1} baseName=\"$CURRENT_NAME\";"
echo "${1} version=\"$CURRENT_VERSION\";"
echo "${1} name=\"$CURRENT_NAME-$CURRENT_VERSION\";"
echo "${1} hash=\"$CURRENT_HASH\";"
echo "${1} url=\"$CURRENT_URL\";"
echo "${1} sha256=\"$CURRENT_HASH\";"
echo "$2"
}
line_position () {
file="$1"
regexp="$2"
count="${3:-1}"
grep -E "$regexp" -m "$count" -B 999999 "$file" | wc -l
}
replace_once () {
file="$1"
regexp="$2"
replacement="$3"
instance="${4:-1}"
position="$(line_position "$file" "$regexp" "$instance")"
sed -re "${position}s $regexp $replacement " -i "$file"
}
set_var_value () {
var="${1}"
value="${2}"
instance="${3:-1}"
file="${4:-$CURRENT_TARGET}"
no_quotes="${5:-0}"
quote='"'
let "$no_quotes" && quote=""
replace_once "$file" "${var} *= *.*" "${var} = ${quote}${value}${quote};"
}
do_regenerate () {
BEFORE="$(cat "$1" | grep -F "$BEGIN_EXPRESSION" -B 999999;)"
AFTER_EXPANDED="$(cat "$1" | grep -F "$BEGIN_EXPRESSION" -A 999999 | grep -E '^ *[}] *; *$' -A 999999;)"
AFTER="$(echo "$AFTER_EXPANDED" | tail -n +2)"
CLOSE_BRACE="$(echo "$AFTER_EXPANDED" | head -n 1)"
SPACING="$(echo "$CLOSE_BRACE" | sed -re 's/[^ ].*//')"
echo "$BEFORE"
do_write_expression "$SPACING" "$CLOSE_BRACE"
echo "$AFTER"
}
do_overwrite () {
hash
do_regenerate "$1" > "$1.new.tmp"
mv "$1.new.tmp" "$1"
}
process_config () {
CONFIG_DIR="$(directory_of "$1")"
source "$CONFIG_DIR/$(basename "$1")"
BEGIN_EXPRESSION='# Generated upstream information';
retrieve_version
ensure_version
ensure_target
update_found && do_overwrite "$CURRENT_TARGET"
}
source "$own_dir/update-walker-service-specific.sh"
process_config "$1"