Make pineappl evolve support EKO v0.15

.github/actions/cache-test-data/action.yml

@@ -10,7 +10,7 @@ runs:
       uses: actions/cache@v4
       with:
         path: test-data
-        key: test-data-v21
+        key: test-data-v23
     - name: Download test data if cache miss
       if: steps.cache.outputs.cache-hit != 'true'
       run: |

CHANGELOG.md

@@ -7,6 +7,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- added a new `V3` metadata reader to the `pineappl evolve` CLI for EKOs
+  generated with `v0.15.0` or higher
+- C API: added new functions `pineappl_grid_evolve_info_shape`,
+  `pineappl_grid_evolve_info`, and `pineappl_grid_evolve` to evolve grids
+- C API: added `pineappl_fktable_optimize` to optimize FK Table-like objects
+  given an optimization assumption
+
 ## [1.0.0] - 10/06/2025
 
 PineAPPL 1.0 is a major rewrite from the previous version, allowing grids to

maintainer/download-test-data.sh

@@ -50,6 +50,8 @@ files=(
     'https://data.nnpdf.science/pineappl/test-data/STAR_WMWP_510GEV_WM-AL-POL_UnpolPDF.tar'
     'https://data.nnpdf.science/pineappl/test-data/ZEUS_2JET_319GEV_374PB-1_DIF_ETQ2_BIN6.pineappl.lz4'
     'https://data.nnpdf.science/pineappl/test-data/ZEUS_2JET_319GEV_374PB-1_DIF_ETQ2_BIN6.tar'
+    'https://data.nnpdf.science/pineappl/test-data/LHCB_WP_8TEV.pineappl.lz4'
+    'https://data.nnpdf.science/pineappl/test-data/LHCB_WP_8TEV.tar'
     'https://ploughshare.web.cern.ch/ploughshare/db/applfast/applfast-atlas-dijets-fnlo-arxiv-1312.3524/grids/applfast-atlas-dijets-fnlo-arxiv-1312.3524-xsec000.tab.gz'
     'https://ploughshare.web.cern.ch/ploughshare/db/applfast/applfast-h1-dijets-appl-arxiv-0010054/grids/applfast-h1-dijets-appl-arxiv-0010054-xsec000.appl'
     'https://ploughshare.web.cern.ch/ploughshare/db/applfast/applfast-h1-incjets-fnlo-arxiv-0706.3722/grids/applfast-h1-incjets-fnlo-arxiv-0706.3722-xsec000.tab.gz'

pineappl_cli/src/evolve.rs

@@ -70,6 +70,7 @@ mod eko {
         V0(MetadataV0),
         V1(MetadataV1),
         V2(MetadataV2),
+        V3(MetadataV3), // v0.15 - v????
     }
 
     const BASES_V1_DEFAULT_PIDS: [i32; 14] = [22, -6, -5, -4, -3, -2, -1, 21, 1, 2, 3, 4, 5, 6];
@@ -86,6 +87,12 @@ mod eko {
         configs: OperatorConfigsV1,
     }
 
+    #[derive(Deserialize)]
+    struct OperatorV2 {
+        init: Vec<f64>,
+        configs: OperatorConfigsV1,
+    }
+
     #[derive(Deserialize)]
     struct OperatorInfoV1 {
         scale: f64,
@@ -105,13 +112,18 @@ mod eko {
         bases: BasesV1,
     }
 
+    #[derive(Deserialize)]
+    struct MetadataV3 {
+        xgrid: Vec<f64>,
+    }
+
     pub enum EkoSlices {
         V0 {
             fac1: Vec<f64>,
             info: OperatorSliceInfo,
             operator: Array5<f64>,
         },
-        // V1 is a special case of V2
+        // V1 and V3 are special cases of V2
         V2 {
             fac1: HashMap<OsString, f64>,
             info: OperatorSliceInfo,
@@ -142,6 +154,7 @@ mod eko {
                 Metadata::V0(v0) => Self::with_v0(v0, eko_path),
                 Metadata::V1(v1) => Self::with_v1(v1, eko_path),
                 Metadata::V2(v2) => Self::with_v2(v2, eko_path),
+                Metadata::V3(v3) => Self::with_v3(v3, eko_path),
             }
         }
 
@@ -325,6 +338,51 @@ mod eko {
             })
         }
 
+        fn with_v3(metadata: MetadataV3, eko_path: &Path) -> Result<Self> {
+            let mut fac1 = HashMap::new();
+            let mut operator: Option<OperatorV2> = None;
+
+            for entry in Archive::new(File::open(eko_path)?).entries_with_seek()? {
+                let entry = entry?;
+                let path = entry.path()?;
+
+                if path.starts_with("./operators")
+                    && (path.extension().is_some_and(|ext| ext == "yaml"))
+                {
+                    let Some(file_stem) = path.file_stem().map(ToOwned::to_owned) else {
+                        continue;
+                    };
+
+                    let op_info: OperatorInfoV1 = serde_yaml::from_reader(entry)?;
+                    fac1.insert(file_stem, op_info.scale);
+                } else if path.as_os_str() == "./operator.yaml" {
+                    operator = Some(serde_yaml::from_reader(entry)?);
+                }
+            }
+
+            let operator =
+                operator.ok_or_else(|| anyhow!("no file 'operator.yaml' in EKO archive found"))?;
+
+            Ok(Self::V2 {
+                fac1,
+                info: OperatorSliceInfo {
+                    // NOTE: Since v0.15, EKOs are always in the flavour basis
+                    pid_basis: PidBasis::Pdg,
+                    fac0: operator.init[0] * operator.init[0],
+                    pids0: BASES_V1_DEFAULT_PIDS.to_vec(),
+                    x0: metadata.xgrid.clone(),
+                    fac1: 0.0,
+                    pids1: BASES_V1_DEFAULT_PIDS.to_vec(),
+                    x1: metadata.xgrid,
+                    conv_type: ConvType::new(
+                        operator.configs.polarized,
+                        operator.configs.time_like,
+                    ),
+                },
+                archive: Archive::new(File::open(eko_path)?),
+            })
+        }
+
         pub fn iter_mut(&mut self) -> EkoSlicesIter {
             match self {
                 Self::V0 {

pineappl_cli/tests/evolve.rs

@@ -190,6 +190,18 @@ const ZEUS_2JET_STR: &str = "b     Grid       FkTable      rel. diff
 2 3.6247796e-3 3.6162230e-3 -2.3605729e-3
 ";
 
+const LHCB_WP_8TEV_STR: &str = "b    Grid       FkTable     rel. diff
+-+-----------+-----------+-------------
+0 8.8660824e2 8.8745467e2  9.5468156e-4
+1 8.3324869e2 8.3388816e2  7.6744152e-4
+2 7.4379285e2 7.4420759e2  5.5761143e-4
+3 6.2114832e2 6.2135970e2  3.4030039e-4
+4 4.8212545e2 4.8218796e2  1.2966015e-4
+5 3.4357834e2 3.4355392e2 -7.1080989e-5
+6 1.7271792e2 1.7266488e2 -3.0707061e-4
+7 4.6738298e1 4.6715819e1 -4.8096830e-4
+";
+
 #[test]
 fn help() {
     Command::cargo_bin("pineappl")
@@ -461,3 +473,21 @@ fn zeus_2jet() {
         .success()
         .stdout(ZEUS_2JET_STR);
 }
+
+#[test]
+fn lhcb_wp_8tev() {
+    let output = NamedTempFile::new("fktable8.lz4").unwrap();
+
+    Command::cargo_bin("pineappl")
+        .unwrap()
+        .args([
+            "evolve",
+            "../test-data/LHCB_WP_8TEV.pineappl.lz4",
+            "../test-data/LHCB_WP_8TEV.tar",
+            output.path().to_str().unwrap(),
+            "NNPDF40_nnlo_as_01180",
+        ])
+        .assert()
+        .success()
+        .stdout(LHCB_WP_8TEV_STR);
+}