Add a CI test for PackageCompiler.jl (#4135)

Author: odow

.github/workflows/package_compiler.yml

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+name: Package Compiler
+on:
+  push:
+    branches:
+      - master
+      - release-*
+  pull_request:
+    types: [opened, synchronize, reopened]
+# needed to allow julia-actions/cache to delete old caches that it has created
+permissions:
+  actions: write
+  contents: read
+jobs:
+  test:
+    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - version: '1'  # The latest point-release (Linux)
+            os: ubuntu-latest
+            arch: x64
+    steps:
+      - uses: actions/checkout@v6
+      - uses: julia-actions/setup-julia@v2
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+      - uses: julia-actions/cache@v3
+      - uses: julia-actions/julia-buildpkg@v1
+      - shell: julia --color=yes --project=test/PackageCompiler/MyApp {0}
+        run: |
+          using Pkg
+          Pkg.develop(PackageSpec(path=pwd()))
+          Pkg.instantiate()
+      - shell: julia --color=yes --project=test/PackageCompiler {0}
+        run: |
+          using Pkg
+          Pkg.instantiate()
+      - run: julia --color=yes --project=test/PackageCompiler test/PackageCompiler/build_app.jl

test/PackageCompiler/.gitignore

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+build

test/PackageCompiler/MyApp/Project.toml

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+name = "MyApp"
+uuid = "4076af6c-e467-56ae-b986-b466b2749573"
+
+[deps]
+HiGHS = "87dc4568-4c63-4d18-b0c0-bb2238e4078b"
+Ipopt = "b6b21f68-93f8-5de0-b562-5493be1d77c9"
+JuMP = "4076af6c-e467-56ae-b986-b466b2749572"
+
+[compat]
+HiGHS = "1"
+Ipopt = "1"
+JuMP = "1"

test/PackageCompiler/MyApp/src/MyApp.jl

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+#  Copyright 2017, Iain Dunning, Joey Huchette, Miles Lubin, and contributors
+#  This Source Code Form is subject to the terms of the Mozilla Public
+#  License, v. 2.0. If a copy of the MPL was not distributed with this
+#  file, You can obtain one at https://mozilla.org/MPL/2.0/.
+#############################################################################
+# JuMP
+# An algebraic modeling language for Julia
+# See https://github.com/jump-dev/JuMP.jl
+#############################################################################
+
+module MyApp
+
+using JuMP
+import HiGHS
+import Ipopt
+
+function run_highs_example()
+    capacity = 10.0
+    profit = [5.0, 3.0, 2.0, 7.0, 4.0]
+    weight = [2.0, 8.0, 4.0, 2.0, 5.0]
+    model = Model(HiGHS.Optimizer)
+    @variable(model, x[1:length(weight)], Bin)
+    @constraint(model, weight' * x <= capacity)
+    @objective(model, Max, profit' * x)
+    optimize!(model)
+    assert_is_solved_and_feasible(model)
+    print(solution_summary(model))
+    return
+end
+
+function run_ipopt_example()
+    model = Model(Ipopt.Optimizer)
+    @variable(model, x)
+    @variable(model, y)
+    @objective(model, Min, (1 - x)^2 + 100 * (y - x^2)^2)
+    optimize!(model)
+    assert_is_solved_and_feasible(model)
+    print(solution_summary(model))
+    return
+end
+
+function julia_main()::Cint
+    solver = only(match(r"--solver=(.+)", only(ARGS)))
+    if solver == "ipopt"
+        run_ipopt_example()
+    else
+        @assert solver == "highs"
+        run_highs_example()
+    end
+    return 0
+end
+
+end

test/PackageCompiler/Project.toml

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+[deps]
+PackageCompiler = "9b87118b-4619-50d2-8e1e-99f35a4d4d9d"
+
+[compat]
+PackageCompiler = "2"

test/PackageCompiler/build_app.jl

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+#  Copyright 2017, Iain Dunning, Joey Huchette, Miles Lubin, and contributors
+#  This Source Code Form is subject to the terms of the Mozilla Public
+#  License, v. 2.0. If a copy of the MPL was not distributed with this
+#  file, You can obtain one at https://mozilla.org/MPL/2.0/.
+#############################################################################
+# JuMP
+# An algebraic modeling language for Julia
+# See https://github.com/jump-dev/JuMP.jl
+#############################################################################
+
+using Test
+
+import PackageCompiler
+
+PackageCompiler.create_app(
+    joinpath(@__DIR__, "MyApp"),
+    joinpath(@__DIR__, "build");
+    force = true,
+)
+
+@testset "test --solver=ipopt" begin
+    app = joinpath(@__DIR__, "build", "bin", "MyApp")
+    output = sprint(io -> run(pipeline(`$app --solver=highs`; stdout = io)))
+    @test occursin("HiGHS", output)
+    @test occursin("OPTIMAL", output)
+end
+
+@testset "test --solver=ipopt" begin
+    app = joinpath(@__DIR__, "build", "bin", "MyApp")
+    output = sprint(io -> run(pipeline(`$app --solver=ipopt`; stdout = io)))
+    @test occursin("Ipopt", output)
+    @test occursin("LOCALLY_SOLVED", output)
+end