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const std = @import("std");

pub fn build(b: *std.Build) void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const exe = b.addExecutable(.{
        .name = "mry",
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize,
    });

    b.installArtifact(exe);

    const run_cmd = b.addRunArtifact(exe);
    run_cmd.step.dependOn(b.getInstallStep());

    if (b.args) |args| {
        run_cmd.addArgs(args);
    }

    const run_step = b.step("run", "Run the app");
    run_step.dependOn(&run_cmd.step);

    const install_docs = b.addInstallDirectory(.{
        .source_dir = exe.getEmittedDocs(),
        .install_dir = .prefix,
        .install_subdir = "docs",
    });

    const docs_step = b.step("docs", "Install docs into zig-out/docs");
    docs_step.dependOn(&install_docs.step);

    const exe_unit_tests = b.addTest(.{
        .root_source_file = b.path("src/main.zig"),
        .target = target,
        .optimize = optimize,
    });

    const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);

    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&run_exe_unit_tests.step);

    const plot_step = b.step("plot", "Plot Benchmark");
    const run_plot = b.addSystemCommand(&.{
        "sh", "-c",
        \\ [ ! -e "$1" ] && exit 1
        \\ [ ! -e "$2" ] && exit 2
        \\ mkdir -p zig-out/plots/
        \\
        \\ NAME=$(basename "$1")
        \\ CSV="zig-out/plots/$NAME.csv"
        \\
        \\ if [ "$CSV" -ot "$0" -o "$(($(cat "$CSV" | wc -l) - 1))" -ne "$(cat "$CSV" | wc -l)" ]; then
        \\   "$0" benchmark "$1" -i "$2" --csv | tee "$CSV"
        \\ fi
        \\
        \\ gnuplot -p -e "
        \\ set datafile separator ',';
        \\ set term x11 size 1000, 300;
        \\ set style line 100 lt 1 lc rgb 'grey' lw 0.5;
        \\ set grid ls 100; set multiplot layout 1,3;
        \\   plot '< sort -t , -g -k 2 $CSV' using 2:3 with lines title 'Duration' lw 3;
        \\   plot '< sort -t , -g -k 2 $CSV' using 2:5 with lines title 'Max Heap Size' lw 3;
        \\   plot '< sort -t , -g -k 2 $CSV' using 2:6 with lines title 'Number Of Nodes' lw 3;
        \\ unset multiplot;"
    });

    run_plot.addArtifactArg(exe);

    if (b.args) |args| {
        run_plot.addArgs(args);
    }

    plot_step.dependOn(&run_plot.step);
    plot_step.dependOn(&exe.step);
}