Set up basic skeleton for CLI

src/main/c/main.c

@@ -0,0 +1,61 @@
+#include <stddef.h>
+#include <stdio.h>
+#include <getopt.h>
+#include "error/error.c"
+#include "util/fstreamin.c"
+#include "util/fstreamout.c"
+#include "util/pipe.c"
+
+int main(int argc, char **argv) {
+  char *input_path = NULL;
+  char *output_path = NULL;
+
+  int c;
+
+  while (1) {
+    static struct option long_options[] = {
+      {"input", required_argument, NULL, 'i'},
+      {"output", required_argument, NULL, 'o'},
+      {0, 0, 0, 0}
+    };
+
+    int option_index = 0;
+    c = getopt_long(argc, argv, "i:o:", long_options, &option_index);
+
+    if (c == -1) {
+      break;
+    }
+
+    switch (c) {
+    case 'i':
+      input_path = optarg;
+      break;
+
+    case 'o':
+      output_path = optarg;
+      break;
+    }
+  }
+
+  if (input_path == NULL) {
+    hbe_fatal("No input file provided");
+  }
+
+  if (output_path == NULL) {
+    hbe_fatal("No output file provided");
+  }
+
+  printf("Input: %s\n", input_path);
+  printf("Output: %s\n", output_path);
+
+  hbu_fstreamin_t input = hbu_fstreamin_create(input_path);
+  hbu_fstreamout_t output = hbu_fstreamout_create(output_path);
+
+  hbu_pipe_t pipe = hbu_pipe_create_blank();
+  hbu_pipe_blank_set_input(pipe, input);
+  hbu_pipe_blank_set_output_fstreamout(pipe, output);
+
+  while (1) {
+    hbu_pipe_accept(pipe);
+  }
+}