Use cardano-config for cardano config parsing

.changes/20261015_022558_cardano-api_palas_read_node_config_cardano_config.yml

@@ -0,0 +1,18 @@
+project: cardano-api
+pr: 1379
+kind:
+- breaking
+description: |
+  `readNodeConfig` and `initialLedgerState` now read node configurations with cardano-config. They accept both the old flat format and the new cardano-config format.
+  `readNodeConfig` now also reads the genesis files, and genesis hashes are now required.
+  A configuration is also rejected if it sets `ExperimentalHardForksEnabled` without a `DijkstraGenesisFile`, or if its tracing section cannot be read.
+  With `ExperimentalHardForksEnabled`, the Dijkstra genesis that is used is the one that the configuration specifies, instead of the example one.
+  Without `ExperimentalHardForksEnabled`, `TestDijkstraHardForkAtEpoch` is now ignored, as in the node.
+  `readNodeConfig` now fails with a `NodeConfigError` instead of `Text`; it carries cardano-config's errors.
+  `readNodeConfig` now also returns cardano-config's warnings, such as unknown keys.
+  `NodeConfig` is now a newtype around cardano-config's `NodeConfiguration` (`ncConfiguration`); its old fields are now functions with the same names.
+  `NodeConfig` no longer has a `FromJSON` instance: use `readNodeConfig`.
+  `PBftSignatureThreshold` and `LastKnownBlockVersion-Major`/`-Minor`/`-Alt` are no longer read, so `ncPBftSignatureThreshold` is always `Nothing` (the consensus default) and `ncByronProtocolVersion` is always 1.0.0; both are deprecated. `cardano-api` does not use these two values when reading or applying blocks.
+  `readByronGenesisConfig`, `readShelleyGenesisConfig`, `readAlonzoGenesisConfig` and `readConwayGenesisConfig` are now plain functions of `NodeConfig`.
+  `ncByronGenesisHash`, `ncShelleyGenesisHash`, `ncAlonzoGenesisHash` and `ncConwayGenesisHash` now return the hash, not a `Maybe`.
+  `GenesisConfigError` keeps only `NECardanoConfig`.

.gitattributes

@@ -1,3 +1,6 @@
 cardano-rpc/gen/** linguist-generated=true
 cardano-rpc/gen/** no-prettify
 
+# Genesis hashes are taken over the raw file bytes, so a CRLF checkout on
+# Windows would not match the hashes the node configuration tests pin.
+cardano-api/test/cardano-api-test/files/input/node-config/*.json text eol=lf

.github/workflows/haskell.yml

@@ -75,6 +75,30 @@ jobs:
         f+${{ matrix.sys.os }}
         g+${{ (startsWith(github.ref, 'refs/heads/gh-readonly-queue/') && github.run_id) || github.event.pull_request.number || github.ref }}
 
+    - name: "[macOS] Use the default Xcode's toolchain and SDK"
+      if: runner.os == 'macOS'
+      # The macos-26 image 20261013.0424 updated the Command Line Tools to 27.0, whose
+      # macOS 27 SDK the default Xcode's linker cannot read ("tapi error: malformed file",
+      # "unknown architecture arm64e.x1-macos"). Builds still reach that SDK through
+      # the Command Line Tools' MacOSX.sdk link even with SDKROOT set, so point that
+      # link at the default Xcode's SDK too. Remove once the image's toolchain and
+      # SDK match again.
+      run: |
+        developer_dir=/Applications/Xcode.app/Contents/Developer
+        sdkroot="$(DEVELOPER_DIR="$developer_dir" xcrun --sdk macosx --show-sdk-path)"
+        echo "DEVELOPER_DIR=$developer_dir" >> "$GITHUB_ENV"
+        echo "SDKROOT=$sdkroot" >> "$GITHUB_ENV"
+        echo "xcode-select -p: $(xcode-select -p)"
+        echo "Using DEVELOPER_DIR=$developer_dir SDKROOT=$sdkroot"
+        DEVELOPER_DIR="$developer_dir" xcrun ld -v 2>&1 | head -1
+        clt_sdk=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk
+        ls -l /Library/Developer/CommandLineTools/SDKs/
+        if [ -e "$clt_sdk" ] || [ -L "$clt_sdk" ]; then
+          sudo mv "$clt_sdk" "$clt_sdk.ci-original"
+        fi
+        sudo ln -s "$sdkroot" "$clt_sdk"
+        echo "$clt_sdk -> $(readlink "$clt_sdk")"
+
     - name: Install Haskell
       uses: input-output-hk/actions/haskell@latest
       id: setup-haskell

cabal.project

@@ -14,7 +14,7 @@ repository cardano-haskell-packages
 -- you need to run if you change them
 index-state:
   , hackage.haskell.org 2026-09-02T14:05:07Z
-  , cardano-haskell-packages 2026-10-06T15:10:52Z
+  , cardano-haskell-packages 2026-10-16T09:27:03Z
 
 packages:
     cardano-api

cardano-api/cardano-api.cabal

@@ -135,6 +135,7 @@ library
     cardano-addresses ^>=4.0.0,
     cardano-base ^>=0.1,
     cardano-binary,
+    cardano-config ^>=2.2.2,
     cardano-crypto,
     cardano-crypto-class ^>=2.6,
     cardano-crypto-wrapper ^>=1.8,
@@ -204,7 +205,6 @@ library
     transformers-except ^>=0.1.3,
     typed-protocols ^>=1.2,
     validation,
-    yaml,
 
   other-modules:
     Cardano.Api.Byron.Internal.Key
@@ -374,6 +374,7 @@ test-suite cardano-api-test
     cardano-api,
     cardano-api:gen,
     cardano-binary,
+    cardano-config,
     cardano-crypto,
     cardano-crypto-class:{cardano-crypto-class, testlib} ^>=2.6,
     cardano-crypto-wrapper:testlib,
@@ -382,6 +383,7 @@ test-suite cardano-api-test
     cardano-ledger-api ^>=1.15,
     cardano-ledger-babbage,
     cardano-ledger-binary,
+    cardano-ledger-byron,
     cardano-ledger-conway,
     cardano-ledger-core:{cardano-ledger-core, testlib} >=1.22,
     cardano-ledger-dijkstra,
@@ -395,6 +397,7 @@ test-suite cardano-api-test
     data-default,
     directory,
     filepath,
+    fs-api,
     hedgehog >=1.1,
     hedgehog-extras,
     hedgehog-quickcheck,