[tracker] tracker: Make it superscary to reset databases

[Carlos Garnacho <carlosg src gnome org>]

commit ea5479b114306a239e00c9124d6f4125efaa1e3a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue May 3 03:16:41 2016 +0200

    tracker: Make it superscary to reset databases
    
    This is possibly a data loss situation, so warn the user that this is
    possibly what will happen.

 src/tracker/tracker-color.h |    3 +++
 src/tracker/tracker-reset.c |   28 ++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 0 deletions(-)
---
diff --git a/src/tracker/tracker-color.h b/src/tracker/tracker-color.h
index a297f81..53d7303 100644
--- a/src/tracker/tracker-color.h
+++ b/src/tracker/tracker-color.h
@@ -29,4 +29,7 @@
 #define WARN_BEGIN    "\033[33m"   /* Yellow */
 #define WARN_END      "\033[0m"
 
+#define CRIT_BEGIN "\033[1;31m" /* Red */
+#define CRIT_END   "\033[0m"
+
 #endif /* __TRACKER_COLOR_H__ */
diff --git a/src/tracker/tracker-reset.c b/src/tracker/tracker-reset.c
index 6e67a18..c92389f 100644
--- a/src/tracker/tracker-reset.c
+++ b/src/tracker/tracker-reset.c
@@ -20,6 +20,7 @@
 #include "config.h"
 
 #include <stdlib.h>
+#include <stdio.h>
 
 #include <glib.h>
 #include <glib/gi18n.h>
@@ -33,6 +34,7 @@
 #include "tracker-daemon.h"
 #include "tracker-process.h"
 #include "tracker-config.h"
+#include "tracker-color.h"
 
 static gboolean hard_reset;
 static gboolean soft_reset;
@@ -134,6 +136,32 @@ reset_run (void)
                return EXIT_FAILURE;
        }
 
+       if (hard_reset || soft_reset) {
+               gchar response[100] = { 0 };
+
+               g_print (CRIT_BEGIN "%s" CRIT_END "\n%s\n\n%s %s: ",
+                        _("CAUTION: This process may irreversibly delete data."),
+                        _("Although most content indexed by Tracker can "
+                          "be safely reindexed, it can't be assured that "
+                          "this is the case for all data. Be aware that "
+                          "you may be incurring in a data loss situation, "
+                          "proceed at your own risk."),
+                        _("Are you sure you want to proceed?"),
+                        /* TRANSLATORS: This is to be displayed on command line output */
+                        _("[y|N]"));
+
+               fgets (response, 100, stdin);
+               response[strlen (response) - 1] = '\0';
+
+               /* TRANSLATORS: this is our test for a [y|N] question in the command line.
+                * A partial or full match will be considered an affirmative answer,
+                * it is intentionally lowercase, so please keep it like this.
+                */
+               if (!response[0] || !g_str_has_prefix (_("yes"), response)) {
+                       return EXIT_FAILURE;
+               }
+       }
+
        /* KILL processes first... */
        if (hard_reset || soft_reset) {
                tracker_process_stop (TRACKER_PROCESS_TYPE_NONE, TRACKER_PROCESS_TYPE_ALL);