99 lines
2.9 KiB
Bash
99 lines
2.9 KiB
Bash
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# Inspired by python/wrapper.nix
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# Wrapper around wrapLuaProgramsIn, below. The $luaPath
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# variable is passed in from the buildLuarocksPackage function.
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set -e
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wrapLuaPrograms() {
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wrapLuaProgramsIn "$out/bin" "$out $luaPath"
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}
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# Builds environment variables like LUA_PATH and PATH walking through closure
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# of dependencies.
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buildLuaPath() {
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local luaPath="$1"
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local path
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# Create an empty table of paths (see doc on loadFromPropagatedInputs
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# for how this is used). Build up the program_PATH and program_LUA_PATH
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# variables.
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declare -A luaPathsSeen=()
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program_PATH=
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luaPathsSeen["@lua@"]=1
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addToSearchPath program_PATH @lua@/bin
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for path in $luaPath; do
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addToLuaPath "$path"
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done
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}
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# with an executable shell script which will set some environment variables
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# and then call into the original binary (which has been given a .wrapped suffix).
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# luaPath is a list of directories
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wrapLuaProgramsIn() {
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local dir="$1"
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local luaPath="$2"
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local f
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buildLuaPath "$luaPath"
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if [ ! -d "$dir" ]; then
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nix_debug "$dir not a directory"
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return
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fi
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nix_debug "wrapping programs in [$dir]"
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# Find all regular files in the output directory that are executable.
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find "$dir" -type f -perm -0100 -print0 | while read -d "" f; do
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# Rewrite "#! .../env lua" to "#! /nix/store/.../lua".
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# Strip suffix, like "3" or "2.7m" -- we don't have any choice on which
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# Lua to use besides one with this hook anyway.
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if head -n1 "$f" | grep -q '#!.*/env.*\(lua\)'; then
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sed -i "$f" -e "1 s^.*/env[ ]*\(lua\)[^ ]*^#! @executable@^"
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fi
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# wrapProgram creates the executable shell script described
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# above. The script will set LUA_(C)PATH and PATH variables!
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# (see pkgs/build-support/setup-hooks/make-wrapper.sh)
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local -a wrap_args=("$f"
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--prefix PATH ':' "$program_PATH"
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--prefix LUA_PATH ';' "$LUA_PATH"
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--prefix LUA_CPATH ';' "$LUA_CPATH"
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)
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# Add any additional arguments provided by makeWrapperArgs
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# argument to buildLuaPackage.
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# makeWrapperArgs
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local -a user_args="($makeWrapperArgs)"
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local -a wrapProgramArgs=("${wrap_args[@]}" "${user_args[@]}")
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# see setup-hooks/make-wrapper.sh
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wrapProgram "${wrapProgramArgs[@]}"
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done
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}
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# Adds the lib and bin directories to the LUA_PATH and PATH variables,
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# respectively. Recurses on any paths declared in
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# `propagated-native-build-inputs`, while avoiding duplicating paths by
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# flagging the directories it has visited in `luaPathsSeen`.
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loadFromPropagatedInputs() {
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local dir="$1"
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# Stop if we've already visited here.
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if [ -n "${luaPathsSeen[$dir]}" ]; then
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return
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fi
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luaPathsSeen[$dir]=1
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addToLuaPath "$dir"
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addToSearchPath program_PATH $dir/bin
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# Inspect the propagated inputs (if they exist) and recur on them.
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local prop="$dir/nix-support/propagated-native-build-inputs"
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if [ -e "$prop" ]; then
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local new_path
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for new_path in $(cat $prop); do
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loadFromPropagatedInputs "$new_path"
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done
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fi
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}
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