pyrox.dev
1# This function downloads and normalizes a patch/diff file.
2# This is primarily useful for dynamically generated patches,
3# such as GitHub's or cgit's, where the non-significant content parts
4# often change with updating of git or cgit.
5# stripLen acts as the -p parameter when applying a patch.
6
7{ lib, fetchurl, patchutils }:
8{ stripLen ? 0, addPrefixes ? false, excludes ? [], ... }@args:
9
10fetchurl ({
11 postFetch = ''
12 tmpfile="$TMPDIR/${args.sha256}"
13 "${patchutils}/bin/lsdiff" "$out" \
14 | sort -u | sed -e 's/[*?]/\\&/g' \
15 | xargs -I{} \
16 "${patchutils}/bin/filterdiff" \
17 --include={} \
18 --strip=${toString stripLen} \
19 ${lib.optionalString addPrefixes ''
20 --addoldprefix=a/ \
21 --addnewprefix=b/ \
22 ''} \
23 --clean "$out" > "$tmpfile"
24 ${patchutils}/bin/filterdiff \
25 -p1 \
26 ${builtins.toString (builtins.map (x: "-x ${x}") excludes)} \
27 "$tmpfile" > "$out"
28 ${args.postFetch or ""}
29 '';
30} // builtins.removeAttrs args ["stripLen" "addPrefixes" "excludes"])