partial windows support/external curl

zfetch (or iguana) is triggering some Crowdstrike heuristic
simply from the inclusion of the library, so we need to add
an option to compile with included zfetch or with external
curl

build.zig

@@ -23,7 +23,12 @@ pub fn build(b: *std.build.Builder) void {
         else => std.os.exit(1),
     };
 
-    configureExe(uploadexe, b, target, mode, zfetch_repo);
+    const path = if (b.option(bool, "curl", "use external curl command") orelse false)
+        "config/curl.zig"
+    else
+        "config/nocurl.zig";
+
+    configureExe(uploadexe, b, target, mode, zfetch_repo, path);
 
     const run_cmd = uploadexe.run();
     run_cmd.step.dependOn(b.getInstallStep());
@@ -36,7 +41,7 @@ pub fn build(b: *std.build.Builder) void {
 
     const downloadexe = b.addExecutable("clipboard-download", "src/download.zig");
 
-    configureExe(downloadexe, b, target, mode, zfetch_repo);
+    configureExe(downloadexe, b, target, mode, zfetch_repo, path);
 
     const run_download_cmd = downloadexe.run();
     run_download_cmd.step.dependOn(b.getInstallStep());
@@ -48,7 +53,7 @@ pub fn build(b: *std.build.Builder) void {
     run_download_step.dependOn(&run_download_cmd.step);
 }
 
-fn configureExe(exe: *std.build.LibExeObjStep, b: *std.build.Builder, target: std.zig.CrossTarget, mode: std.builtin.Mode, zfetch_repo: anytype) void {
+fn configureExe(exe: *std.build.LibExeObjStep, b: *std.build.Builder, target: std.zig.CrossTarget, mode: std.builtin.Mode, zfetch_repo: anytype, config_path: []const u8) void {
     exe.setTarget(target);
     exe.setBuildMode(mode);
     if (target.getOs().tag == .linux) {
@@ -102,6 +107,12 @@ fn configureExe(exe: *std.build.LibExeObjStep, b: *std.build.Builder, target: st
         .name = "iguanaTLS",
         .path = .{ .path = "libs/zfetch/libs/iguanaTLS/src/main.zig" },
     });
+
+    exe.addPackage(.{
+        .name = "config",
+        .path = .{ .path = config_path },
+    });
+
     exe.install();
 }
 

config/curl.zig

@@ -0,0 +1 @@
+pub const curl: ?[]const u8 = "d:\\d\\bin\\curl";

config/nocurl.zig

@@ -0,0 +1 @@
+pub const curl: ?[]const u8 = null;

src/clipboard.zig

@@ -1,6 +1,7 @@
 const std = @import("std");
 const zfetch = @import("zfetch");
 const crypt = @import("crypt.zig");
+const config = @import("config");
 // const tls = @import("iguanaTLS");
 
 // NGINX config isn't allowing ECDHE-RSA-CHACHA20-POLY1305 on TLS 1.2
@@ -91,6 +92,9 @@ fn getKey(allocator: std.mem.Allocator) !*[crypt.key_size]u8 {
 }
 
 fn get(allocator: std.mem.Allocator) ![]const u8 {
+    if (config.curl) |curl|
+        return getCurl(allocator, curl);
+
     // TODO: Windows
     // var cert_reader = std.io.fixedBufferStream(
     //     @embedFile("/etc/ssl/certs/ca-certificates.crt"),
@@ -134,6 +138,12 @@ fn get(allocator: std.mem.Allocator) ![]const u8 {
     return data.toOwnedSlice();
 }
 
+fn getCurl(allocator: std.mem.Allocator, curl_path: []const u8) ![]const u8 {
+    _ = allocator;
+    _ = curl_path;
+    return "hello";
+}
+
 fn post(allocator: std.mem.Allocator, data: []const u8) !void {
     // TODO: Windows
     // var cert_reader = std.io.fixedBufferStream(

src/download.zig

@@ -1,3 +1,4 @@
+const builtin = @import("builtin");
 const std = @import("std");
 const Clipboard = @import("clipboard.zig");
 
@@ -34,7 +35,6 @@ pub fn main() !u8 {
 
     return 0;
 }
-
 fn addToClipboardNoError(allocator: std.mem.Allocator, data: []const u8) void {
     addToClipboard(allocator, data) catch |e| {
         std.log.err("Could not add data to clipboard: {}", .{e});
@@ -46,18 +46,16 @@ fn addToClipboardNoError(allocator: std.mem.Allocator, data: []const u8) void {
 
 fn addToClipboard(allocator: std.mem.Allocator, data: []const u8) !void {
     // We're going to cheat here and just run xclip
-    const xclip_cmd = try std.fmt.allocPrint(allocator, "echo '{s}' | xclip -selection c", .{data});
-    defer allocator.free(xclip_cmd);
+    const result = os: {
+        if (builtin.os.tag == .linux) {
+            break :os try execLinux(allocator, data);
+        } else if (builtin.os.tag == .windows) {
+            break :os try execWindows(allocator, data);
+        } else {
+            return error.OsUnsupported;
+        }
+    };
 
-    const result = try std.ChildProcess.exec(.{
-        .allocator = allocator,
-        .argv = &[_][]const u8{
-            "/usr/bin/env",
-            "sh",
-            "-c",
-            xclip_cmd,
-        },
-    });
     try std.io.getStdErr().writer().writeAll(result.stderr);
     switch (result.term) {
         .Exited => |code| if (code != 0) return error.NonZeroExit,
@@ -66,3 +64,32 @@ fn addToClipboard(allocator: std.mem.Allocator, data: []const u8) !void {
         .Unknown => return error.Failed,
     }
 }
+
+fn execLinux(allocator: std.mem.Allocator, data: []const u8) !std.ChildProcess.ExecResult {
+    const xclip_cmd = try std.fmt.allocPrint(allocator, "echo -n '{s}'| xclip -selection c", .{data});
+    defer allocator.free(xclip_cmd);
+
+    return std.ChildProcess.exec(.{
+        .allocator = allocator,
+        .argv = &[_][]const u8{
+            "/usr/bin/env",
+            "sh",
+            "-c",
+            xclip_cmd,
+        },
+    });
+}
+
+fn execWindows(allocator: std.mem.Allocator, data: []const u8) !std.ChildProcess.ExecResult {
+    const clip_cmd = try std.fmt.allocPrint(allocator, "echo '{s}'| clip", .{data});
+    defer allocator.free(clip_cmd);
+
+    return std.ChildProcess.exec(.{
+        .allocator = allocator,
+        .argv = &[_][]const u8{
+            "c:\\windows\\system32\\cmd.exe", // TODO: use Comspec
+            "/c",
+            clip_cmd,
+        },
+    });
+}