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support for --argstr in the nix-build tf module #441

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4 changes: 4 additions & 0 deletions terraform/nix-build/main.tf
Original file line number Diff line number Diff line change
@@ -1,4 +1,7 @@
locals {
nix_argstrs = jsonencode({
argstrs = { for k, v in var.nix_argstrs : k => v }
})
nix_options = jsonencode({
options = { for k, v in var.nix_options : k => v }
})
Expand All @@ -8,6 +11,7 @@ data "external" "nix-build" {
query = {
attribute = var.attribute
file = var.file
nix_argstrs = local.nix_argstrs
nix_options = local.nix_options
special_args = jsonencode(var.special_args)
}
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11 changes: 8 additions & 3 deletions terraform/nix-build/nix-build.sh
Original file line number Diff line number Diff line change
@@ -1,8 +1,13 @@
#!/usr/bin/env bash
set -efu

declare file attribute nix_options special_args
eval "$(jq -r '@sh "attribute=\(.attribute) file=\(.file) nix_options=\(.nix_options) special_args=\(.special_args)"')"
declare file attribute nix_argstrs nix_options special_args
eval "$(jq -r '@sh "attribute=\(.attribute) file=\(.file) nix_argstrs=\(.nix_argstrs) nix_options=\(.nix_options) special_args=\(.special_args)"')"
if [ "${nix_argstrs}" != '{"argstrs":{}}' ]; then
argstrs=$(echo "${nix_argstrs}" | jq -r '.argstrs | to_entries | map("--argstr \(.key) \(.value)") | join(" ")')
else
argstrs=""
fi
if [ "${nix_options}" != '{"options":{}}' ]; then
options=$(echo "${nix_options}" | jq -r '.options | to_entries | map("--option \(.key) \(.value)") | join(" ")')
else
Expand All @@ -12,7 +17,7 @@ if [[ ${special_args-} == "{}" ]]; then
# no special arguments, proceed as normal
if [[ -n ${file-} ]] && [[ -e ${file-} ]]; then
# shellcheck disable=SC2086
out=$(nix build --no-link --json $options -f "$file" "$attribute")
out=$(nix build --no-link --json $argstrs $options -f "$file" "$attribute")
else
# shellcheck disable=SC2086
out=$(nix build --no-link --json ${options} "$attribute")
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6 changes: 6 additions & 0 deletions terraform/nix-build/variables.tf
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,12 @@ variable "file" {
default = null
}

variable "nix_argstrs" {
type = map(string)
description = "the argstrs of nix"
default = {}
}

variable "nix_options" {
type = map(string)
description = "the options of nix"
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