const builtin = @import("builtin"); const std = @import("std"); const pkgs = @import("deps.zig").pkgs; pub fn build(b: *std.build.Builder) !void { // Standard target options allows the person running `zig build` to choose // what target to build for. Here we do not override the defaults, which // means any target is allowed, and the default is native. Other options // for restricting supported target set are available. // We want the target to be aarch64-linux for deploys const target = std.zig.CrossTarget{ .cpu_arch = .aarch64, .os_tag = .linux, }; // Standard release options allow the person running `zig build` to select // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. // const mode = b.standardReleaseOptions(); const exe = b.addExecutable("bootstrap", "src/main.zig"); pkgs.addAllTo(exe); exe.setTarget(target); exe.setBuildMode(.ReleaseSafe); exe.strip = true; exe.install(); // TODO: We can cross-compile of course, but stripping and zip commands // may vary if (std.builtin.os.tag == .linux) { // Package step const package_step = b.step("package", "Package the function"); package_step.dependOn(b.getInstallStep()); // strip may not be installed or work for the target arch // TODO: make this much less fragile const strip = try std.fmt.allocPrint(b.allocator, "[ -x /usr/aarch64-linux-gnu/bin/strip ] && /usr/aarch64-linux-gnu/bin/strip {s}", .{b.getInstallPath(exe.install_step.?.dest_dir, exe.install_step.?.artifact.out_filename)}); defer b.allocator.free(strip); package_step.dependOn(&b.addSystemCommand(&.{ "/bin/sh", "-c", strip }).step); const function_zip = b.getInstallPath(exe.install_step.?.dest_dir, "function.zip"); const zip = try std.fmt.allocPrint(b.allocator, "zip -qj9 {s} {s}", .{ function_zip, b.getInstallPath(exe.install_step.?.dest_dir, exe.install_step.?.artifact.out_filename) }); defer b.allocator.free(zip); package_step.dependOn(&b.addSystemCommand(&.{ "/bin/sh", "-c", zip }).step); // Deployment const deploy_step = b.step("deploy", "Deploy the function"); var deal_with_iam = true; if (b.args) |args| { for (args) |arg| { if (std.mem.eql(u8, "--role", arg)) { deal_with_iam = false; break; } } } var iam_role: []u8 = &.{}; const iam_step = b.step("iam", "Create/Get IAM role for function"); deploy_step.dependOn(iam_step); // iam_step will either be a noop or all the stuff below if (deal_with_iam) { // if someone adds '-- --role arn...' to the command line, we don't // need to do anything with the iam role. Otherwise, we'll create/ // get the IAM role and stick the name in a file in our destination // directory to be used later const iam_role_name_file = b.getInstallPath(exe.install_step.?.dest_dir, "iam_role_name"); iam_role = try std.fmt.allocPrint(b.allocator, "--role $(cat {s})", .{iam_role_name_file}); // defer b.allocator.free(iam_role); if (!fileExists(iam_role_name_file)) { // Role get/creation command const ifstatement_fmt = \\ if aws iam get-role --role-name lambda_basic_execution 2>&1 |grep -q NoSuchEntity; then aws iam create-role --output text --query Role.Arn --role-name lambda_basic_execution --assume-role-policy-document '{ \\ "Version": "2012-10-17", \\ "Statement": [ \\ { \\ "Sid": "", \\ "Effect": "Allow", \\ "Principal": { \\ "Service": "lambda.amazonaws.com" \\ }, \\ "Action": "sts:AssumeRole" \\ } \\ ]}' > /dev/null; fi && \ \\ aws iam attach-role-policy --policy-arn arn:aws:iam::aws:policy/AWSLambdaExecute --role-name lambda_basic_execution && \ \\ aws iam get-role --role-name lambda_basic_execution --query Role.Arn --output text > ; const ifstatement = try std.mem.concat(b.allocator, u8, &[_][]const u8{ ifstatement_fmt, iam_role_name_file }); defer b.allocator.free(ifstatement); iam_step.dependOn(&b.addSystemCommand(&.{ "/bin/sh", "-c", ifstatement }).step); } } const function_name = b.option([]const u8, "function-name", "Function name for Lambda [zig-fn]") orelse "zig-fn"; const ifstatement = "if aws lambda get-function --function-name {s} 2>&1 |grep -q ResourceNotFoundException; then echo not found > /dev/null; {s}; else echo found > /dev/null; {s}; fi"; // The architectures option was introduced in 2.2.43 released 2021-10-01 // We want to use arm64 here because it is both faster and cheaper for most // Amazon Linux 2 is the only arm64 supported option const not_found = "aws lambda create-function --architectures arm64 --runtime provided.al2 --function-name {s} --zip-file fileb://{s} --handler not_applicable {s}"; const not_found_fmt = try std.fmt.allocPrint(b.allocator, not_found, .{ function_name, function_zip, iam_role }); defer b.allocator.free(not_found_fmt); const found = "aws lambda update-function-code --function-name {s} --zip-file fileb://{s}"; const found_fmt = try std.fmt.allocPrint(b.allocator, found, .{ function_name, function_zip }); defer b.allocator.free(found_fmt); var found_final: []const u8 = undefined; var not_found_final: []const u8 = undefined; if (b.args) |args| { found_final = try addArgs(b.allocator, found_fmt, args); not_found_final = try addArgs(b.allocator, not_found_fmt, args); } else { found_final = found_fmt; not_found_final = not_found_fmt; } const cmd = try std.fmt.allocPrint(b.allocator, ifstatement, .{ function_name, not_found_fmt, found_fmt }); defer b.allocator.free(cmd); // std.debug.print("{s}\n", .{cmd}); deploy_step.dependOn(package_step); deploy_step.dependOn(&b.addSystemCommand(&.{ "/bin/sh", "-c", cmd }).step); // TODO: Looks like IquanaTLS isn't playing nicely with payloads this small // const payload = b.option([]const u8, "payload", "Lambda payload [{\"foo\":\"bar\"}]") orelse // \\ {"foo": "bar"}" // ; const payload = b.option([]const u8, "payload", "Lambda payload [{\"foo\":\"bar\", \"baz\": \"qux\"}]") orelse \\ {"foo": "bar", "baz": "qux"}" ; const run_script = \\ f=$(mktemp) && \ \\ logs=$(aws lambda invoke \ \\ --cli-binary-format raw-in-base64-out \ \\ --invocation-type RequestResponse \ \\ --function-name {s} \ \\ --payload '{s}' \ \\ --log-type Tail \ \\ --query LogResult \ \\ --output text "$f" |base64 -d) && \ \\ cat "$f" && rm "$f" && \ \\ echo && echo && echo "$logs" ; const run_script_fmt = try std.fmt.allocPrint(b.allocator, run_script, .{ function_name, payload }); defer b.allocator.free(run_script_fmt); const run_cmd = b.addSystemCommand(&.{ "/bin/sh", "-c", run_script_fmt }); run_cmd.step.dependOn(deploy_step); if (b.args) |args| { run_cmd.addArgs(args); } const run_step = b.step("run", "Run the app"); run_step.dependOn(&run_cmd.step); } } fn fileExists(file_name: []const u8) bool { const file = std.fs.openFileAbsolute(file_name, .{}) catch return false; defer file.close(); return true; } fn addArgs(allocator: *std.mem.Allocator, original: []const u8, args: [][]const u8) ![]const u8 { var rc = original; for (args) |arg| { rc = try std.mem.concat(allocator, u8, &.{ rc, " ", arg }); } return rc; }