prefetch-npm-deps: fix reproducibility

pkgs/build-support/node/build-npm-package/hooks/npm-config-hook.sh

@@ -56,6 +56,9 @@ npmConfigHook() {
       exit 1
     fi
 
+    export CACHE_MAP_PATH="$TMP/MEOW"
+    @prefetchNpmDeps@ --map-cache
+
     @prefetchNpmDeps@ --fixup-lockfile "$srcLockfile"
 
     local cachePath
@@ -109,6 +112,9 @@ npmConfigHook() {
 
     patchShebangs node_modules
 
+    rm "$CACHE_MAP_PATH"
+    unset CACHE_MAP_PATH
+
     echo "Finished npmConfigHook"
 }
 

pkgs/build-support/node/fetch-npm-deps/Cargo.toml

@@ -17,3 +17,4 @@ sha2 = "0.10.6"
 tempfile = "3.3.0"
 ureq = { version = "2.5.0" }
 url = { version = "2.3.1", features = ["serde"] }
+walkdir = "2.3.2"

pkgs/build-support/node/fetch-npm-deps/src/cacache.rs

@@ -1,5 +1,5 @@
 use digest::{Digest, Update};
-use serde::Serialize;
+use serde::{Deserialize, Serialize};
 use sha1::Sha1;
 use sha2::{Sha256, Sha512};
 use std::{
@@ -9,24 +9,24 @@ use std::{
 };
 use url::Url;
 
-#[derive(Serialize)]
-struct Key {
-    key: String,
-    integrity: String,
-    time: u8,
-    size: usize,
-    metadata: Metadata,
+#[derive(Serialize, Deserialize)]
+pub(super) struct Key {
+    pub(super) key: String,
+    pub(super) integrity: String,
+    pub(super) time: u8,
+    pub(super) size: usize,
+    pub(super) metadata: Metadata,
 }
 
-#[derive(Serialize)]
-struct Metadata {
-    url: Url,
-    options: Options,
+#[derive(Serialize, Deserialize)]
+pub(super) struct Metadata {
+    pub(super) url: Url,
+    pub(super) options: Options,
 }
 
-#[derive(Serialize)]
-struct Options {
-    compress: bool,
+#[derive(Serialize, Deserialize)]
+pub(super) struct Options {
+    pub(super) compress: bool,
 }
 
 pub struct Cache(PathBuf);