feat(tvix/derivation): serialize Nix Derivation r/5536

This adds a Derivation structure and allows to write it to a structure that implements std::fmt:Write.
The implementation is based on the go-nix version.

Change-Id: Ib54e1202b5c67f5d206b21bc109a751e971064cf
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7659
Reviewed-by: flokli <flokli@flokli.de>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI

1 files changed, 19 insertions, 0 deletions

diff --git a/tvix/derivation/src/tests/derivation_tests/52a9id8hx688hvlnz4d1n25ml1jdykz0-unicode.drv.json b/tvix/derivation/src/tests/derivation_tests/52a9id8hx688hvlnz4d1n25ml1jdykz0-unicode.drv.json
new file mode 100644
index 000000000000..bf837b3e8665
--- /dev/null
+++ b/tvix/derivation/src/tests/derivation_tests/52a9id8hx688hvlnz4d1n25ml1jdykz0-unicode.drv.json
@@ -0,0 +1,19 @@
+{
+  "outputs": {
+    "out": {
+      "path": "/nix/store/vgvdj6nf7s8kvfbl2skbpwz9kc7xjazc-unicode"
+    }
+  },
+  "input_sources": [],
+  "input_derivations": {},
+  "platform": ":",
+  "builder": ":",
+  "arguments": [],
+  "environment": {
+    "builder": ":",
+    "letters": "räksmörgås\nrødgrød med fløde\nLübeck\n肥猪\nこんにちは / 今日は\n🌮\n",
+    "name": "unicode",
+    "out": "/nix/store/vgvdj6nf7s8kvfbl2skbpwz9kc7xjazc-unicode",
+    "system": ":"
+  }
+}