1 files changed, 119 insertions, 0 deletions
diff --git a/args.awk b/args.awk
new file mode 100644
index 0000000..17d9431
--- /dev/null
+++ b/args.awk
@@ -0,0 +1,119 @@
+
+BEGIN {
+  opt_count = 0;
+  FIELDS["short"] = 0; # short option
+  FIELDS["long"]  = 0; # long option
+  FIELDS["arg"]   = 0; # option argument
+  FIELDS["desc"]  = 0; # description
+  FIELDS["func"]  = 0; # callback function
+}
+
+
+
+func PrintShell() {
+  printf "OPTIONS=(\n# callback short long argument\n"
+  for (i = 0; i < opt_count; i++)
+    printf("'%s' '%s' '%s' '%s' '%s'\n",
+        OPTIONS["func", i], OPTIONS["short", i],
+        OPTIONS["long", i], OPTIONS["arg", i],
+        OPTIONS["desc", i]);
+  printf(")\n");
+}
+
+func PrintMan() {
+  for (i = 0; i < opt_count; i++) {
+    short = OPTIONS["short", i];
+    long = OPTIONS["long", i];
+    arg = OPTIONS["arg", i];
+    desc = OPTIONS["desc", i];
+    if (arg)
+      printf(".TP\n.BI \"-%1s \" %s \", --%s=\" %s",
+             short, arg, long, arg);
+    else
+      printf(".TP\n-%1s, --%s",
+             short, long);
+    printf("\n%s\n\n", desc);
+  }
+}
+
+
+
+
+func EmptyEntry(entry) {
+  #printf("Checking for empty entry at [%d]...\n", entry);
+  for (type in FIELDS) {
+    #printf("  Checking for empty field '%s'\n", type);
+    if (OPTIONS[type, entry])
+      return 0;
+  }
+  return 1;
+}
+
+
+/^\s*#/ { # comment
+  next;
+}
+
+
+/^\s*$/ { # end of entry
+  if (!EmptyEntry(opt_count))
+    opt_count++;
+  next;
+}
+
+
+/^\s*-/ { # option line
+  for (i = 1; i <= NF; i++) {
+    switch ($i) {
+      case /^-+$/: # ignore fields with only dashes
+        continue;
+      case /^--\w[\w-]*/:  # long option
+        sub(/^--/, "", $i);
+        type = "long";
+        break;
+      case /^-\w+/:   # short option
+        sub(/^-/, "", $i);
+        type = "short";
+        break;
+      case /^\w+/:    # option argument
+        type = "arg";
+        break;
+    }
+    OPTIONS[type, opt_count] = $i;
+  }
+  
+}
+
+
+/^\s*@/ { # function callback line
+  sub(/^\s*@\s*/, "");
+  OPTIONS["func", opt_count] = $1;
+  next;
+}
+
+
+/^\s*"/ {
+  sub(/^\s*"\s*/, "");
+  if (OPTIONS["desc", opt_count] !~ /\s$/)
+    OPTIONS["desc", opt_count] += " ";
+  OPTIONS["desc", opt_count] = $0;
+  next;
+}
+
+
+END {
+  if (!EmptyEntry(opt_count)) opt_count++;
+  
+  if (!OUTPUT) OUTPUT = "shell";
+  switch (OUTPUT) {
+    case "shell":
+      PrintShell();
+      break;
+    case "man":
+      PrintMan();
+      break;
+    default:
+      printf("Unknown format '%s'", OUTPUT) > "/dev/stderr";
+  }
+}
+