zig package for libssh2

.github/workflows/build.yml

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+name: Build and Test
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-latest]
+        target: [
+          native,
+          x86_64-linux-gnu,
+          x86_64-linux-musl,
+          x86_64-windows,
+          aarch64-macos,
+          aarch64-linux-gnu,
+          aarch64-linux-musl
+          # TODO: bsd
+        ]
+        optimize: [
+          Debug,
+          ReleaseSafe,
+          ReleaseFast,
+          ReleaseSmall
+        ]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+
+      - name: Setup Zig
+        uses: mlugg/setup-zig@v1
+        with:
+          version: 0.13.0
+
+      - name: Build
+        run: zig build -Dtarget=${{ matrix.target }} -Doptimize=${{ matrix.optimize }}

.gitignore

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+.zig-cache
+zig-out

build.zig

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+const std = @import("std");
+
+pub fn build(b: *std.Build) void {
+    const target = b.standardTargetOptions(.{});
+    const optimize = b.standardOptimizeOption(.{});
+
+    const libssh2_dep = b.dependency("libssh2", .{
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const mbedtls_dep = b.dependency("mbedtls", .{
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const lib = b.addStaticLibrary(.{
+        .name = "ssh2",
+        .target = target,
+        .optimize = optimize,
+        .link_libc = true,
+    });
+    lib.addIncludePath(libssh2_dep.path("include"));
+    lib.linkLibrary(mbedtls_dep.artifact("mbedtls"));
+    lib.addCSourceFiles(.{
+        .root = libssh2_dep.path("src"),
+        .flags = &.{},
+        .files = &.{
+            "channel.c",
+            "comp.c",
+            "crypt.c",
+            "hostkey.c",
+            "kex.c",
+            "mac.c",
+            "misc.c",
+            "packet.c",
+            "publickey.c",
+            "scp.c",
+            "session.c",
+            "sftp.c",
+            "userauth.c",
+            "transport.c",
+            "version.c",
+            "knownhost.c",
+            "agent.c",
+            "mbedtls.c",
+            "pem.c",
+            "keepalive.c",
+            "global.c",
+            "blowfish.c",
+            "bcrypt_pbkdf.c",
+            "agent_win.c",
+        },
+    });
+    lib.installHeader(b.path("config/libssh2_config.h"), "libssh2_config.h");
+    lib.installHeadersDirectory(libssh2_dep.path("include"), ".", .{});
+    lib.defineCMacro("LIBSSH2_MBEDTLS", null);
+
+    if (target.result.os.tag == .windows) {
+        lib.defineCMacro("_CRT_SECURE_NO_DEPRECATE", "1");
+        lib.defineCMacro("HAVE_LIBCRYPT32", null);
+        lib.defineCMacro("HAVE_WINSOCK2_H", null);
+        lib.defineCMacro("HAVE_IOCTLSOCKET", null);
+        lib.defineCMacro("HAVE_SELECT", null);
+        lib.defineCMacro("LIBSSH2_DH_GEX_NEW", "1");
+
+        if (target.result.isGnu()) {
+            lib.defineCMacro("HAVE_UNISTD_H", null);
+            lib.defineCMacro("HAVE_INTTYPES_H", null);
+            lib.defineCMacro("HAVE_SYS_TIME_H", null);
+            lib.defineCMacro("HAVE_GETTIMEOFDAY", null);
+        }
+    } else {
+        lib.defineCMacro("HAVE_UNISTD_H", null);
+        lib.defineCMacro("HAVE_INTTYPES_H", null);
+        lib.defineCMacro("HAVE_STDLIB_H", null);
+        lib.defineCMacro("HAVE_SYS_SELECT_H", null);
+        lib.defineCMacro("HAVE_SYS_UIO_H", null);
+        lib.defineCMacro("HAVE_SYS_SOCKET_H", null);
+        lib.defineCMacro("HAVE_SYS_IOCTL_H", null);
+        lib.defineCMacro("HAVE_SYS_TIME_H", null);
+        lib.defineCMacro("HAVE_SYS_UN_H", null);
+        lib.defineCMacro("HAVE_LONGLONG", null);
+        lib.defineCMacro("HAVE_GETTIMEOFDAY", null);
+        lib.defineCMacro("HAVE_INET_ADDR", null);
+        lib.defineCMacro("HAVE_POLL", null);
+        lib.defineCMacro("HAVE_SELECT", null);
+        lib.defineCMacro("HAVE_SOCKET", null);
+        lib.defineCMacro("HAVE_STRTOLL", null);
+        lib.defineCMacro("HAVE_SNPRINTF", null);
+        lib.defineCMacro("HAVE_O_NONBLOCK", null);
+    }
+
+    b.installArtifact(lib);
+}

build.zig.zon

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+.{
+    // This is the default name used by packages depending on this one. For
+    // example, when a user runs `zig fetch --save <url>`, this field is used
+    // as the key in the `dependencies` table. Although the user can choose a
+    // different name, most users will stick with this provided value.
+    //
+    // It is redundant to include "zig" in this name because it is already
+    // within the Zig package namespace.
+    .name = "libssh2",
+
+    // This is a [Semantic Version](https://semver.org/).
+    // In a future version of Zig it will be used for package deduplication.
+    .version = "1.11.0",
+
+    // This field is optional.
+    // This is currently advisory only; Zig does not yet do anything
+    // with this value.
+    //.minimum_zig_version = "0.11.0",
+
+    // This field is optional.
+    // Each dependency must either provide a `url` and `hash`, or a `path`.
+    // `zig build --fetch` can be used to fetch all dependencies of a package, recursively.
+    // Once all dependencies are fetched, `zig build` no longer requires
+    // internet connectivity.
+    .dependencies = .{
+        .libssh2 = .{
+            .url = "https://github.com/libssh2/libssh2/archive/refs/tags/libssh2-1.11.0.tar.gz",
+            .hash = "1220a0863be6190270168974107d04653087aacc89e72cd81914789cb7d84b744fda",
+        },
+        .mbedtls = .{
+            .url = "git+https://github.com/allyourcodebase/mbedtls.git#e4da72f6a8bedc883e34953514a3b62cbbd4f251",
+            .hash = "1220ffeef9740c79b6f62f6bf350f12a7b14768acf548cb47cd56c5ca58a15af7970",
+        },
+    },
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+        // For example...
+        //"LICENSE",
+        //"README.md",
+    },
+}

config/libssh2_config.h

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+#ifndef LIBSSH2_CONFIG_H
+#define LIBSSH2_CONFIG_H
+
+#ifdef WIN32
+#include <mswsock.h>
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#endif
+
+#endif

src/main.zig

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+const std = @import("std");
+
+pub fn main() !void {
+    // Prints to stderr (it's a shortcut based on `std.io.getStdErr()`)
+    std.debug.print("All your {s} are belong to us.\n", .{"codebase"});
+
+    // stdout is for the actual output of your application, for example if you
+    // are implementing gzip, then only the compressed bytes should be sent to
+    // stdout, not any debugging messages.
+    const stdout_file = std.io.getStdOut().writer();
+    var bw = std.io.bufferedWriter(stdout_file);
+    const stdout = bw.writer();
+
+    try stdout.print("Run `zig build test` to run the tests.\n", .{});
+
+    try bw.flush(); // don't forget to flush!
+}
+
+test "simple test" {
+    var list = std.ArrayList(i32).init(std.testing.allocator);
+    defer list.deinit(); // try commenting this out and see if zig detects the memory leak!
+    try list.append(42);
+    try std.testing.expectEqual(@as(i32, 42), list.pop());
+}

src/root.zig

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+const std = @import("std");
+const testing = std.testing;
+
+export fn add(a: i32, b: i32) i32 {
+    return a + b;
+}
+
+test "basic add functionality" {
+    try testing.expect(add(3, 7) == 10);
+}