nix-helpers: d24abb84496572885e15f94585dc57f7fd879900

     1: { bash, coreutils, lib, writeScript }:
     2: 
     3: toFail:
     4: lib.overrideDerivation toFail (old: {
     5:   builder = writeScript "toFail-${old.name}" ''
     6:     #!${bash}/bin/bash
     7:     echo "Ensuring that ${old.name} fails to build" 1>&2
     8:     if "${old.builder}" ${builtins.concatStringsSep " " old.args}
     9:     then
    10:       echo "Error: ${old.name} succeeded but should have failed" 1>&2
    11:       exit 1
    12:     fi
    13: 
    14:     echo "isBroken: ${old.name} failed to build, as we expected" 1>&2
    15: 
    16:     echo "Generating outputs [$outputs] to appease Nix" 1>&2
    17:     MADE=0
    18:     for O_STRING in $outputs
    19:     do
    20:       O_PATH="${"$" + "{!O_STRING}"}"
    21:       if [[ -e "$O_PATH" ]]
    22:       then
    23:         echo "Cleaning up '$O_PATH' after build" 1>&2
    24:         "${coreutils}/bin/rm" -rf "$O_PATH"
    25:       fi
    26: 
    27:       echo "Failed as expected" > "$O_PATH"
    28:       MADE=$(( MADE + 1 ))
    29:     done
    30:     [[ "$MADE" -gt 0 ]] || {
    31:       echo "Didn't spot any outputs, attempting to make 'out' ($out)" 1>&2
    32:       if [[ -e "$out" ]]
    33:       then
    34:         echo "Cleaning up 'out' after build" 1>&2
    35:         "${coreutils}/bin/rm" -rf "$out"
    36:       fi
    37:       echo "Failed as expected" > "$out"
    38:     }
    39:   '';
    40: })