reproduce.tt: Add --print-flags option

Dependencies

• [2] TL7KZWSU reproduce.tt: Use color
• [3] MRINNBYY reproduce.tt: Add option to fetch but not build
• [4] HZWUT4YN Allow users to reproduce builds on their own systems
• [5] 5Q4ZLL37 reproduce.tt: Add --help flag
• [6] SM5PVIIJ reproduce.tt: Use -I instead of $NIX_PATH

Change contents

• edit in src/root/reproduce.tt at line 19
  [3.11]

  [4.124]
  + printFlags=
• edit in src/root/reproduce.tt at line 50
  [3.59]

  [4.1078]
  +

  + --print-flags

  + Fetch the inputs, then print the argument to nix-build on stdout

  + and exit.
• edit in src/root/reproduce.tt at line 68
  [3.116]

  [4.1373]
  + elif [ "$arg" = --print-flags ]; then

  + printFlags=1
• edit in src/root/reproduce.tt at line 198
  [4.3499]

  [2.447]
  + args+=("$nixExprInputDir/[% build.nixexprpath %]" -A '[% build.job.name %]')

  +

  + if [ -n "$printFlags" ]; then

  + first=1

  + for i in "${args[@]}"; do

  + if [ -z "$first" ]; then printf " "; fi

  + first=

  + printf "%q" "$i"

  + done

  + exit 0

  + fi

  +
• replacement in src/root/reproduce.tt at line 213
  [4.3568]→[2.476:591](∅→∅)
  − exec nix-build "$nixExprInputDir/[% build.nixexprpath %]" -A '[% build.job.name %]' "${args[@]}" "${extraArgs[@]}"
  [4.3568]
  + exec nix-build "${args[@]}" "${extraArgs[@]}"