MAINT: Add locks and a minor CI

.gitattributes

@@ -0,0 +1,2 @@
+# SCM syntax highlighting & preventing 3-way merges
+pixi.lock merge=binary linguist-language=YAML linguist-generated=true

.github/workflows/ci_basic.yml

@@ -0,0 +1,25 @@
+name: Build and check binaries
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+on: [push, pull_request]
+jobs:
+  build_eon:
+    runs-on: ${{ matrix.os }}
+    name: test (${{ matrix.os }})
+    strategy:
+      fail-fast: false
+      matrix:
+        # TODO: Check windows-2022 later
+        os: [ubuntu-22.04, macos-13, macos-14]
+    steps:
+      - uses: actions/checkout@v4
+      - uses: prefix-dev/[email protected]
+        with:
+          cache: true
+          cache-write: ${{ github.event_name == 'push' && github.ref_name == 'main' }}
+          activate-environment: true
+      - name: Build sketchmap tools
+        shell: pixi run bash -e {0}
+        run: |
+          make -j $(nproc)

.gitignore

@@ -5,3 +5,7 @@ bin/*
 *.d
 *.a
 make.in
+
+# pixi environments
+.pixi
+*.egg-info

libs/minsearch.hpp

@@ -599,7 +599,7 @@ void min_powell (
       const std::valarray<double> & initial_pos,
       std::valarray<double>& rpos, double& rvalue,
       const PowellOpts& op,
-      std::valarray<std::valarray<double> >& u=std::valarray<double>(0)
+      std::valarray<std::valarray<double> >& u
      )
 {
     RndGaussian<double,StdRndUniform> rng;

libs/tbdefs.hpp

@@ -21,6 +21,20 @@
 #include <complex>
 #include <time.h>
 
+template<typename T>
+std::ostream& operator<<(std::ostream& os, const std::valarray<T>& v)
+{
+    os << "[";
+    if (v.size() > 0) {
+        os << v[0];
+        for (size_t i = 1; i < v.size(); ++i) {
+            os << ", " << v[i];
+        }
+    }
+    os << "]";
+    return os;
+}
+
 /**************************************
  *          MACROS & DEFINES          *
  **************************************/