1 files changed, 84 insertions, 0 deletions
diff --git a/src/os.zig b/src/os.zig
new file mode 100644
index 0000000..ad9fe23
--- /dev/null
+++ b/src/os.zig
@@ -0,0 +1,84 @@
+const std = @import("std");
+const c = @cImport({
+    @cInclude("stdlib.h");
+    @cInclude("time.h");
+});
+
+const log = std.log.scoped(.os);
+
+pub fn captureStdout(
+    io: std.Io,
+    command: []const u8,
+    opts: struct {
+        cwd: std.process.Child.Cwd = .inherit,
+        environ_map: ?*const std.process.Environ.Map = null,
+        progress_node: std.Progress.Node = std.Progress.Node.none,
+    },
+    w: *std.Io.Writer,
+) !void {
+    log.debug("Running <<< {s}", .{command});
+
+    var p = try std.process.spawn(io, .{
+        .argv = &.{ "sh", "-c", command },
+        .cwd = opts.cwd,
+        .stdin = .ignore,
+        .stderr = .ignore,
+        .stdout = .pipe,
+        .environ_map = opts.environ_map,
+        .progress_node = opts.progress_node,
+    });
+
+    var buf: [1024]u8 = undefined;
+    var r = p.stdout.?.readerStreaming(io, &buf);
+
+    _ = try w.sendFileAll(&r, .unlimited);
+    try w.flush();
+
+    const result = try p.wait(io);
+    if (result.exited != 0) return error.NonZeroExitCode;
+}
+
+pub fn shell(
+    io: std.Io,
+    command: []const u8,
+    opts: struct {
+        cwd: std.process.Child.Cwd = .inherit,
+        environ_map: ?*const std.process.Environ.Map = null,
+        progress_node: std.Progress.Node = std.Progress.Node.none,
+    },
+) !void {
+    log.debug("Running Shell <<< {s}", .{command});
+
+    var p = try std.process.spawn(io, .{
+        .argv = &.{ "sh", "-c", command },
+        .cwd = opts.cwd,
+        .stdin = .ignore,
+        .stderr = .inherit,
+        .stdout = .inherit,
+        .environ_map = opts.environ_map,
+        .progress_node = opts.progress_node,
+    });
+
+    const result = try p.wait(io);
+    if (result.exited != 0) return error.NonZeroExitCode;
+}
+
+// use libc strftime to format time string
+pub fn formatTimestamp(alloc: std.mem.Allocator, ts: std.Io.Timestamp, fmt: [*c]const u8) ![]const u8 {
+    const mtime_str = try alloc.alloc(u8, std.os.linux.PATH_MAX);
+    var tm: c.struct_tm = undefined;
+
+    const sec = ts.toSeconds();
+    _ = c.localtime_r(&sec, &tm);
+    const rc = c.strftime(
+        mtime_str.ptr,
+        mtime_str.len,
+        fmt,
+        &tm,
+    );
+    switch (std.posix.errno(rc)) {
+        .SUCCESS => {},
+        else => |err| return std.posix.unexpectedErrno(err),
+    }
+    return try alloc.realloc(mtime_str, rc);
+}