pyrox.dev
1# Since the same derivation can be depend on in multiple ways, we need to
2# accumulate *each* role (i.e. host and target platforms relative the depending
3# derivation) in which the derivation is used.
4#
5# The role is intened to be use as part of other variables names like
6# - $NIX_${role_pre}_SOMETHING
7# - $NIX_SOMETHING_${role_post}
8
9function getRole() {
10 case $1 in
11 -1)
12 role_pre='BUILD_'
13 role_post='_FOR_BUILD'
14 ;;
15 0)
16 role_pre=''
17 role_post=''
18 ;;
19 1)
20 role_pre='TARGET_'
21 role_post='_FOR_TARGET'
22 ;;
23 *)
24 echo "@name@: used as improper sort of dependency" >2
25 return 1
26 ;;
27 esac
28}
29
30# `hostOffset` describes how the host platform of the package is slid relative
31# to the depending package. `targetOffset` likewise describes the target
32# platform of the package. Both are brought into scope of the setup hook defined
33# for dependency whose setup hook is being processed relative to the package
34# being built.
35
36function getHostRole() {
37 getRole "$hostOffset"
38}
39function getTargetRole() {
40 getRole "$targetOffset"
41}
42
43# `depHostOffset` describes how the host platform of the dependencies are slid
44# relative to the depending package. `depTargetOffset` likewise describes the
45# target platform of dependenices. Both are brought into scope of the
46# environment hook defined for the dependency being applied relative to the
47# package being built.
48
49function getHostRoleEnvHook() {
50 getRole "$depHostOffset"
51}
52function getTargetRoleEnvHook() {
53 getRole "$depTargetOffset"
54}
55
56# This variant is inteneded specifically for code-prodocing tool wrapper scripts
57# `NIX_@wrapperName@_@infixSalt@_TARGET_*` tracks this (needs to be an exported
58# env var so can't use fancier data structures).
59function getTargetRoleWrapper() {
60 case $targetOffset in
61 -1)
62 export NIX_@wrapperName@_@infixSalt@_TARGET_BUILD=1
63 ;;
64 0)
65 export NIX_@wrapperName@_@infixSalt@_TARGET_HOST=1
66 ;;
67 1)
68 export NIX_@wrapperName@_@infixSalt@_TARGET_TARGET=1
69 ;;
70 *)
71 echo "@name@: used as improper sort of dependency" >2
72 return 1
73 ;;
74 esac
75}