dpkg: Automate debug help output printing

Add a new array of struct debuginfo to hold debug flag information, so
that it can be handled automatically.

This has multiple purposes; it will guarantee the output value always
matches the one defined in the code, there's one less place to modify
when adding a new debug flag, the ouput is easier to modify w/o fuzzying
the translated strings, it's easier for the translators to deal with new
debug flag additions, it will not allow for the source reference name to
be translated thus avoiding errors.

src/main.c

@@ -222,31 +222,47 @@ static const struct forceinfo {
   {  NULL                                               }
 };
 
+#define DBG_DEF(n, d) \
+  { .flag = dbg_##n, .name = #n, .desc = d }
+
+static const struct debuginfo {
+  int flag;
+  const char *name;
+  const char *desc;
+} debuginfos[] = {
+  DBG_DEF(general,         N_("Generally helpful progress information")),
+  DBG_DEF(scripts,         N_("Invocation and status of maintainer scripts")),
+  DBG_DEF(eachfile,        N_("Output for each file processed")),
+  DBG_DEF(eachfiledetail,  N_("Lots of output for each file processed")),
+  DBG_DEF(conff,           N_("Output for each configuration file")),
+  DBG_DEF(conffdetail,     N_("Lots of output for each configuration file")),
+  DBG_DEF(depcon,          N_("Dependencies and conflicts")),
+  DBG_DEF(depcondetail,    N_("Lots of dependencies/conflicts output")),
+  DBG_DEF(triggers,        N_("Trigger activation and processing")),
+  DBG_DEF(triggersdetail,  N_("Lots of output regarding triggers")),
+  DBG_DEF(triggersstupid,  N_("Silly amounts of output regarding triggers")),
+  DBG_DEF(veryverbose,     N_("Lots of drivel about eg the dpkg/info directory")),
+  DBG_DEF(stupidlyverbose, N_("Insane amounts of drivel")),
+  { 0, NULL, NULL }
+};
+
 static void setdebug(const struct cmdinfo *cpi, const char *value) {
   char *endp;
   unsigned long mask;
+  const struct debuginfo *dip;
 
   if (*value == 'h') {
     printf(_(
 "%s debugging option, --debug=<octal> or -D<octal>:\n"
 "\n"
-" number  ref. in source   description\n"
-"      1   general           Generally helpful progress information\n"
-"      2   scripts           Invocation and status of maintainer scripts\n"
-"     10   eachfile          Output for each file processed\n"
-"    100   eachfiledetail    Lots of output for each file processed\n"
-"     20   conff             Output for each configuration file\n"
-"    200   conffdetail       Lots of output for each configuration file\n"
-"     40   depcon            Dependencies and conflicts\n"
-"    400   depcondetail      Lots of dependencies/conflicts output\n"
-"  10000   triggers          Trigger activation and processing\n"
-"  20000   triggersdetail    Lots of output regarding triggers\n"
-"  40000   triggersstupid    Silly amounts of output regarding triggers\n"
-"   1000   veryverbose       Lots of drivel about eg the dpkg/info directory\n"
-"   2000   stupidlyverbose   Insane amounts of drivel\n"
-"\n"
+" number  ref. in source   description\n"), DPKG);
+
+    for (dip = debuginfos; dip->name; dip++)
+      printf(" %6o  %-16s %s\n", dip->flag, dip->name, gettext(dip->desc));
+
+    printf(_("\n"
 "Debugging options are be mixed using bitwise-or.\n"
-"Note that the meanings and values are subject to change.\n"), DPKG);
+"Note that the meanings and values are subject to change.\n"));
     m_output(stdout, _("<standard output>"));
     exit(0);
   }