357d2530e5
Inspired by https://github.com/NixOS/nixpkgs/pull/387725#issuecomment-2704943777, script is based on https://github.com/NixOS/nixpkgs/pull/336172 using what i learned in https://github.com/NixOS/nixpkgs/pull/386865, part of https://github.com/NixOS/nixpkgs/issues/346453 Should be zero rebuilds. All candidates were made using: ```shell export NIXPKGS_ALLOW_UNFREE=1 export NIXPKGS_ALLOW_INSECURE=1 export NIXPKGS_ALLOW_BROKEN=1 git-wait restore . test -s packages.json || ( set -x; time nix-env --extra-experimental-features no-url-literals --option system x86_64-linux -f ./. -qaP --json --meta --drv-path --out-path --show-trace --no-allow-import-from-derivation --arg config '{ allowAliases = false; }' > packages.json ) list_attrpath_fname_col() { jq <packages.json 'to_entries[] | select(.value.meta.position==null|not) | "\(.key)\t\(.value.meta.position)"' -r | sed -e "s#\t$(realpath .)/#\t#" | sed -e 's#:\([0-9]*\)$#\t\1#' | grep . | grep -iv haskell | grep -iv /top-level/ | grep -iv chicken | grep pkgs/by-name/ | grep -iv build | grep -E '/(package|default)\.nix' } FLOCKDIR="$(mktemp -d)" N_WORKERS=4 while read attrpath fname col; do grep -qE 'repo *= *("\$\{pname\}"|pname);' "$fname" || continue echo | ( # mutex on fname flock --nonblock 200 || { >&2 echo "failed to aquire lock for $fname" exit 1 } echo "$attrpath" data="$(nix eval --impure --expr 'with import ./. {}; { inherit ('"$attrpath"') pname drvPath passthru meta; drvPath2='"$attrpath"'.src.drvPath; }' --json)" || exit test -n "$data" || exit pname="$(jq <<<"$data" .pname -r)" test -n "$pname" || exit (set -x sd -F '${pname}' "$pname" "$fname" sd -F ' = pname;' " = \"$pname\";" "$fname" ) data2="$(nix eval --impure --expr 'with import ./. {}; { inherit ('"$attrpath"') pname drvPath passthru meta; drvPath2='"$attrpath"'.src.drvPath; }' --json)" if [[ "$data" = "$data2" ]]; then (set -x; git-wait add "$fname") else (set -x; git-wait restore "$fname") exit fi (set -x sd -F ' rec {' ' {' "$fname" ) data3="$(nix eval --impure --expr 'with import ./. {}; { inherit ('"$attrpath"') pname drvPath passthru meta; drvPath2='"$attrpath"'.src.drvPath; }' --json 2>/dev/nul)" if [[ "$data" = "$data3" ]]; then (set -x; git-wait add "$fname") else (set -x; git-wait restore "$fname") fi ) 200>"$FLOCKDIR"/"$(sha256sum - <<<"$fname" | cut -d' ' -f1)".lock & while [[ $(jobs -p | wc -l) -ge $N_WORKERS ]]; do wait -n < <(jobs -p) || true done done < <(list_attrpath_fname_col) wait git restore . time nix-env --extra-experimental-features no-url-literals --option system x86_64-linux -f ./. -qaP --json --meta --drv-path --out-path --show-trace --no-allow-import-from-derivation --arg config '{ allowAliases = false; }' > packages2.json ``` `diff packages{,2}.json` is empty, indicating that no package nor src derivation has changed. I checked and cherry-picked the changes using `GIT_DIFF_OPTS='-u15' git -c interactive.singleKey=true add --patch`
71 lines
1.8 KiB
Nix
71 lines
1.8 KiB
Nix
{
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lib,
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stdenv,
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fetchFromGitHub,
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bmake,
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docbook_xsl,
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libxslt,
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}:
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stdenv.mkDerivation rec {
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pname = "libfsm";
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version = "0.1pre2987_${builtins.substring 0 8 src.rev}";
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src = fetchFromGitHub {
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owner = "katef";
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repo = "libfsm";
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rev = "087e3389ad2cd5e5c40caeb40387e632567d7258";
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hash = "sha256-XWrZxnRbMB609l+sYFf8VsXy3NxqBsBPUrHgKLIyu/I=";
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fetchSubmodules = true;
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};
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nativeBuildInputs = [
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bmake
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docbook_xsl
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libxslt # xsltproc
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];
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enableParallelBuilding = true;
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enableParallelInstalling = false;
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# note: build checks value of '$CC' to add some extra cflags, but we don't
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# necessarily know which 'stdenv' someone chose, so we leave it alone (e.g.
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# if we use stdenv vs clangStdenv, we don't know which, and CC=cc in all
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# cases.) it's unclear exactly what should be done if we want those flags,
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# but the defaults work fine.
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makeFlags = [
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"-r"
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"PREFIX=$(out)"
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];
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# fix up multi-output install. we also have to fix the pkg-config libdir
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# file; it uses prefix=$out; libdir=${prefix}/lib, which is wrong in
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# our case; libdir should really be set to the $lib output.
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postInstall = ''
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mkdir -p $lib $dev/lib
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mv $out/lib $lib/lib
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mv $out/include $dev/include
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mv $out/share/pkgconfig $dev/lib/pkgconfig
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rmdir $out/share
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for x in libfsm.pc libre.pc; do
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substituteInPlace "$dev/lib/pkgconfig/$x" \
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--replace 'libdir=''${prefix}/lib' "libdir=$lib/lib"
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done
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'';
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outputs = [
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"out"
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"lib"
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"dev"
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];
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meta = with lib; {
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description = "DFA regular expression library & friends";
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homepage = "https://github.com/katef/libfsm";
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license = licenses.bsd2;
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platforms = platforms.unix;
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maintainers = with maintainers; [ thoughtpolice ];
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};
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}
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