diff --git a/build.zig b/build.zig index 224585a..42e4cd3 100644 --- a/build.zig +++ b/build.zig @@ -1,29 +1,147 @@ +const builtin = @import("builtin"); const std = @import("std"); const pkgs = @import("deps.zig").pkgs; -pub fn build(b: *std.build.Builder) void { +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. - const target = b.standardTargetOptions(.{}); + // 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 mode = b.standardReleaseOptions(); const exe = b.addExecutable("bootstrap", "src/main.zig"); pkgs.addAllTo(exe); exe.setTarget(target); - exe.setBuildMode(mode); + exe.setBuildMode(.ReleaseSafe); + exe.strip = true; exe.install(); - const run_cmd = exe.run(); - run_cmd.step.dependOn(b.getInstallStep()); - if (b.args) |args| { - run_cmd.addArgs(args); - } + // 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); - const run_step = b.step("run", "Run the app"); - run_step.dependOn(&run_cmd.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}); + + // 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); + + const payload = + \\ {"foo": "bar"}" + ; + const run_script = + \\ f=$(mktemp) && \ + \\ logs=$(aws lambda invoke \ + \\ --function-name {s} \ + \\ --payload $(echo '{s}'|base64) \ + \\ --log-type Tail \ + \\ --query LogResult \ + \\ --output text "$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 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; }