pyrox.dev
1#!/bin/bash
2
3declare -gA luaPathsSeen=()
4
5# shellcheck disable=SC2164,SC2041
6nix_print() {
7 if [ ${NIX_DEBUG:-0} -ge $1 ]; then
8 echo "$2"
9 fi
10}
11
12nix_debug() {
13 nix_print 3 "$1"
14}
15
16addToLuaSearchPathWithCustomDelimiter() {
17 local varName="$1"
18 local absPattern="$2"
19
20 # export only if we haven't already got this dir in the search path
21 if [[ ${!varName-} == *"$absPattern"* ]]; then return; fi
22
23 # if the path variable has not yet been set, initialize it to ";;"
24 # this is a magic value that will be replaced by the default,
25 # allowing relative modules to be used even when there are system modules.
26 if [[ ! -v "${varName}" ]]; then export "${varName}=;;"; fi
27
28 # export only if the folder contains lua files
29 shopt -s globstar
30
31 local adjustedPattern="${absPattern/\?/\*\*\/\*}"
32 for _file in $adjustedPattern; do
33 export "${varName}=${!varName:+${!varName};}${absPattern}"
34 shopt -u globstar
35 return;
36 done
37 shopt -u globstar
38}
39
40# used in setup Hooks to load LUA_PATH and LUA_CPATH
41# luaEnvHook
42luaEnvHook() {
43 _addToLuaPath "$1"
44}
45
46addToLuaPath() {
47 local dir="$1"
48
49 if [ ! -d "$dir" ]; then
50 nix_debug "$dir not a directory abort"
51 return 0
52 fi
53 cd "$dir"
54 for pattern in @luapathsearchpaths@; do
55 addToLuaSearchPathWithCustomDelimiter LUA_PATH "$PWD/$pattern"
56 done
57
58 # LUA_CPATH
59 for pattern in @luacpathsearchpaths@; do
60 addToLuaSearchPathWithCustomDelimiter LUA_CPATH "$PWD/$pattern"
61 done
62 cd - >/dev/null
63}
64
65
66_addToLuaPath() {
67 local dir="$1"
68
69 nix_debug "_addToLuaPath called for dir $dir"
70
71 if [[ ! -d "$dir" ]]; then
72 nix_debug "$dir not a directory abort"
73 return 0
74 fi
75
76# set -x
77 # if [ -n "${pythonPathsSeen[$dir]}" ]; then return; fi
78 if [[ -n "${luaPathsSeen[$dir]:-}" ]]; then
79 # if [ -n "${luaPathsSeen[$dir]}" ]; then
80 nix_debug "$dir already parsed"
81 return
82 fi
83
84 luaPathsSeen["$dir"]=true
85
86 # shellcheck disable=SC2164
87 cd "$dir"
88 for pattern in @luapathsearchpaths@; do
89 addToLuaSearchPathWithCustomDelimiter LUA_PATH "$PWD/$pattern"
90 done
91
92 # LUA_CPATH
93 for pattern in @luacpathsearchpaths@; do
94 addToLuaSearchPathWithCustomDelimiter LUA_CPATH "$PWD/$pattern"
95 done
96
97 cd - >/dev/null
98
99 addToSearchPath program_PATH "$dir"/bin
100
101 # Inspect the propagated inputs (if they exist) and recur on them.
102 local prop="$dir/nix-support/propagated-build-inputs"
103 if [ -e "$prop" ]; then
104 local new_path
105 for new_path in $(cat $prop); do
106 nix_debug "newpath: $new_path"
107 _addToLuaPath "$new_path"
108 done
109 fi
110
111}
112
113# Builds environment variables like LUA_PATH and PATH walking through closure
114# of dependencies.
115buildLuaPath() {
116 local luaPath="$1"
117 local path
118
119 nix_debug "BUILD_LUA_PATH"
120
121# # Create an empty table of paths (see doc on loadFromPropagatedInputs
122# # for how this is used). Build up the program_PATH variable.
123# # shellcheck disable=SC2034
124 program_PATH=
125 for path in $luaPath; do
126 _addToLuaPath "$path"
127 done
128}
129
130