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Re: [virt-tools-list] [PATCH libosinfo 1/3] Add support for install tree metadata



On Thu, Feb 23, 2012 at 03:40:57PM +0200, Zeeshan Ali (Khattak) wrote:
> On Thu, Feb 23, 2012 at 3:27 PM, Daniel P. Berrange <berrange redhat com> wrote:
> > On Thu, Feb 23, 2012 at 03:15:36PM +0200, Zeeshan Ali (Khattak) wrote:
> >> On Thu, Feb 23, 2012 at 2:23 PM, Daniel P. Berrange <berrange redhat com> wrote:
> >> > From: "Daniel P. Berrange" <berrange redhat com>
> >> >
> >> > The <media> element and OsinfoMedia class can be used to identify
> >> > install media, ie ISO images.
> >> >
> >> > The <tree> element and OsinfoTree class are the same concept but
> >> > used to identify installation trees.
> >>
> >> Looks good. Some comments:
> >>
> >> > diff --git a/osinfo/osinfo_db.c b/osinfo/osinfo_db.c
> >> > index ecc8fbd..986e7c9 100644
> >> > --- a/osinfo/osinfo_db.c
> >> > +++ b/osinfo/osinfo_db.c
> >> > @@ -31,6 +31,7 @@ G_DEFINE_TYPE (OsinfoDb, osinfo_db, G_TYPE_OBJECT);
> >> >  #define OSINFO_DB_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), OSINFO_TYPE_DB, OsinfoDbPrivate))
> >> >
> >> >  #define match_regex(pattern, str) (((pattern) == NULL && (str) == NULL) || \
> >> > +                                   ((pattern) == NULL) ||               \
> >> >                                    ((pattern) != NULL && (str) != NULL && \
> >> >                                     g_regex_match_simple((pattern), (str), 0, 0)))
> >> >
> >> > @@ -386,11 +387,10 @@ OsinfoOs *osinfo_db_guess_os_from_media(OsinfoDb *db,
> >> >             const gchar *os_publisher = osinfo_media_get_publisher_id(os_media);
> >> >             const gchar *os_application = osinfo_media_get_application_id(os_media);
> >> >
> >> > -            if ((match_regex (os_volume, media_volume) ||
> >> > -                 match_regex (os_application, media_application))
> >> > -                 &&
> >> > -                (match_regex (os_system, media_system) ||
> >> > -                 match_regex (os_publisher, media_publisher))) {
> >> > +            if (match_regex (os_volume, media_volume) &&
> >> > +                match_regex (os_application, media_application) &&
> >> > +                match_regex (os_system, media_system) &&
> >> > +                match_regex (os_publisher, media_publisher)) {
> >> >                 ret = os;
> >> >                 if (matched_media != NULL)
> >> >                     *matched_media = os_media;
> >> > @@ -410,6 +410,77 @@ OsinfoOs *osinfo_db_guess_os_from_media(OsinfoDb *db,
> >> >     return ret;
> >> >  }
> >>
> >> I guess this got included accidently?
> >
> >
> > Yeah, I split this off into the separate commit I posted earlier, and
> > forgot to remove it here.
> >
> >
> >>
> >> > +static OsinfoTree *load_keyinfo(const gchar *location,
> >> > +                                const gchar *content,
> >> > +                                gsize length,
> >> > +                                GError **error)
> >> > +{
> >> > +    GKeyFile *file = g_key_file_new();
> >> > +    OsinfoTree *tree = NULL;
> >> > +    gchar *family = NULL;
> >> > +    gchar *variant = NULL;
> >> > +    gchar *version = NULL;
> >> > +    gchar *arch = NULL;
> >> > +    gchar *kernel = NULL;
> >> > +    gchar *initrd = NULL;
> >> > +    gchar *bootiso = NULL;
> >> > +    gchar *group = NULL;
> >> > +
> >> > +    if (!g_key_file_load_from_data(file, content, length,
> >> > +                                   G_KEY_FILE_NONE, error))
> >> > +        goto cleanup;
> >> > +
> >> > +    if (!(family = g_key_file_get_string(file, "general", "family", error)) &&
> >> > +        (*error && (*error)->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND &&
> >> > +         (*error)->code != G_KEY_FILE_ERROR_GROUP_NOT_FOUND))
> >> > +        goto cleanup;
> >> > +
> >> > +    if (!(variant = g_key_file_get_string(file, "general", "variant", error)) &&
> >> > +        (*error && (*error)->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND &&
> >> > +         (*error)->code != G_KEY_FILE_ERROR_GROUP_NOT_FOUND))
> >> > +        goto cleanup;
> >> > +
> >> > +    if (!(version = g_key_file_get_string(file, "general", "version", error)) &&
> >> > +        (*error && (*error)->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND &&
> >> > +         (*error)->code != G_KEY_FILE_ERROR_GROUP_NOT_FOUND))
> >> > +        goto cleanup;
> >> > +
> >> > +    if (!(arch = g_key_file_get_string(file, "general", "arch", error)) &&
> >> > +        (*error && (*error)->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND &&
> >> > +         (*error)->code != G_KEY_FILE_ERROR_GROUP_NOT_FOUND))
> >> > +        goto cleanup;
> >>
> >> I don't this part. Isn't the location supposed to be some remote
> >> directory? Where does a key file come from?
> >
> > We pass a URI to GFile and load that into memory, using its builtin http
> > support. So when we use the GKeyFile, we're just giving it a pre-loaded
> > chunk of memory, thus avoiding the problem that it only understands local
> > file paths.
> 
> No, I understood the loading part. I just didn't get where you get the
> key file/data from given a URI of install tree?

It comes  from the hidden file    $URL/.treeinfo

Regards,
Daniel
-- 
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