Enhance compatibility and improve Julia binary detection

.github/workflows/tests-coverage.yml

@@ -141,7 +141,7 @@ jobs:
         if: runner.os == 'Linux'
         uses: julia-actions/setup-julia@v2
         with:
-          version: "1.6"
+          version: "1.11"
 
       # Linux package installation (classic pip install)
       - name: Install dependencies (Linux)

doc/whatsnew/v0-3-0.rst

@@ -29,3 +29,15 @@ Changes
 * Added a storage operation strategy where the storage is charged when PV feed-in is higher than electricity demand of the household and discharged when electricity demand exceeds PV generation `#386 <https://github.com/openego/eDisGo/pull/386>`_
 * Added an estimation of the voltage deviation over a cable when selecting a suitable cable to connect a new component `#411 <https://github.com/openego/eDisGo/pull/411>`_
 * Added clipping of heat pump electrical power at its maximum value #428 <https://github.com/openego/eDisGo/pull/428>
+* Updated CI to use Julia 1.11 and improved Julia OPF integration:
+  - Set GitHub Actions Julia setup to use `1.11`.
+  - Added early startup diagnostics in the Julia launcher (`Main.jl`) and
+    runtime `__init__()` prints in the `eDisGo_OPF` Julia package to
+    explicitly report the Julia version and detected PowerModels version.
+  - Avoided `Pkg` calls at package precompile time and implemented safe,
+    filesystem-based PowerModels version detection to prevent precompilation
+    errors across Julia versions.
+  - Made the Python OPF launcher use the resolved absolute Julia binary
+    path (prefers `julia1.11`) to avoid manifest/activation mismatches.
+  These changes improve compatibility with Julia 1.11 and recent
+  PowerModels releases. See `#570 <https://github.com/openego/eDisGo/pull/570>`_.

edisgo/config/config_opf_julia_default.cfg

@@ -11,4 +11,4 @@
 
 [julia_dir]
 
-julia_bin = julia-1.1.0/bin
+julia_bin = julia1.11

edisgo/opf/eDisGo_OPF.jl/Main.jl

@@ -1,6 +1,22 @@
-cd(dirname(@__FILE__))
+cd(@__DIR__)
+# Early prints to help diagnose which Julia binary / packages are used
+try
+  println("[eDisGo_OPF Main] Julia ", VERSION)
+  pm_path = Base.find_package("PowerModels")
+  if pm_path !== nothing
+    println("[eDisGo_OPF Main] PowerModels found at ", pm_path)
+  else
+    println("[eDisGo_OPF Main] PowerModels not found on LOAD_PATH")
+  end
+catch e
+  # best effort, do not fail on diagnostics
+  try
+    @warn("eDisGo_OPF Main: could not print diagnostics: $e")
+  catch
+  end
+end
 using Pkg
-Pkg.activate("")
+Pkg.activate(@__DIR__)
 Pkg.instantiate()
 try
     using eDisGo_OPF
@@ -48,8 +64,10 @@ function optimize_edisgo()
       # else
       JuMP.compute_conflict!(pm.model)
       if MOI.get(pm.model, MOI.ConflictStatus()) == MOI.CONFLICT_FOUND
-        iis_model, _ = copy_conflict(pm.model)
-        print(iis_model)
+        # copy_conflict might not be available in newer JuMP versions
+        # iis_model, _ = copy_conflict(pm.model)
+        # print(iis_model)
+        println("Conflict detected in optimization model")
       end
       #end
     elseif result_soc["termination_status"] == MOI.OPTIMAL