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b0c42a53c9
While it already is possible to filter objects by some criteria in
git-rev-list(1), it is not yet possible to filter out only a specific
type of objects. This makes some filters less useful. The `blob:limit`
filter for example filters blobs such that only those which are smaller
than the given limit are returned. But it is unfit to ask only for these
smallish blobs, given that git-rev-list(1) will continue to print tags,
commits and trees.
Now that we have the infrastructure in place to also filter tags and
commits, we can improve this situation by implementing a new filter
which selects objects based on their type. Above query can thus
trivially be implemented with the following command:
$ git rev-list --objects --filter=object:type=blob \
--filter=blob:limit=200
Furthermore, this filter allows to optimize for certain other cases: if
for example only tags or commits have been selected, there is no need to
walk down trees.
The new filter is not yet supported in bitmaps. This is going to be
implemented in a subsequent commit.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
135 lines
4 KiB
C
135 lines
4 KiB
C
#ifndef LIST_OBJECTS_FILTER_OPTIONS_H
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#define LIST_OBJECTS_FILTER_OPTIONS_H
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#include "cache.h"
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#include "parse-options.h"
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#include "string-list.h"
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/*
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* The list of defined filters for list-objects.
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*/
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enum list_objects_filter_choice {
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LOFC_DISABLED = 0,
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LOFC_BLOB_NONE,
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LOFC_BLOB_LIMIT,
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LOFC_TREE_DEPTH,
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LOFC_SPARSE_OID,
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LOFC_OBJECT_TYPE,
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LOFC_COMBINE,
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LOFC__COUNT /* must be last */
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};
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/*
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* Returns a configuration key suitable for describing the given object filter,
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* e.g.: "blob:none", "combine", etc.
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*/
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const char *list_object_filter_config_name(enum list_objects_filter_choice c);
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struct list_objects_filter_options {
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/*
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* 'filter_spec' is the raw argument value given on the command line
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* or protocol request. (The part after the "--keyword=".) For
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* commands that launch filtering sub-processes, or for communication
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* over the network, don't use this value; use the result of
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* expand_list_objects_filter_spec() instead.
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* To get the raw filter spec given by the user, use the result of
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* list_objects_filter_spec().
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*/
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struct string_list filter_spec;
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/*
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* 'choice' is determined by parsing the filter-spec. This indicates
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* the filtering algorithm to use.
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*/
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enum list_objects_filter_choice choice;
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/*
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* Choice is LOFC_DISABLED because "--no-filter" was requested.
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*/
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unsigned int no_filter : 1;
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/*
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* BEGIN choice-specific parsed values from within the filter-spec. Only
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* some values will be defined for any given choice.
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*/
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char *sparse_oid_name;
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unsigned long blob_limit_value;
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unsigned long tree_exclude_depth;
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enum object_type object_type;
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/* LOFC_COMBINE values */
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/* This array contains all the subfilters which this filter combines. */
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size_t sub_nr, sub_alloc;
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struct list_objects_filter_options *sub;
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/*
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* END choice-specific parsed values.
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*/
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};
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/* Normalized command line arguments */
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#define CL_ARG__FILTER "filter"
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void list_objects_filter_die_if_populated(
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struct list_objects_filter_options *filter_options);
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/*
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* Parses the filter spec string given by arg and either (1) simply places the
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* result in filter_options if it is not yet populated or (2) combines it with
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* the filter already in filter_options if it is already populated. In the case
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* of (2), the filter specs are combined as if specified with 'combine:'.
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*
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* Dies and prints a user-facing message if an error occurs.
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*/
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void parse_list_objects_filter(
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struct list_objects_filter_options *filter_options,
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const char *arg);
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int opt_parse_list_objects_filter(const struct option *opt,
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const char *arg, int unset);
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#define OPT_PARSE_LIST_OBJECTS_FILTER(fo) \
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OPT_CALLBACK(0, CL_ARG__FILTER, fo, N_("args"), \
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N_("object filtering"), \
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opt_parse_list_objects_filter)
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/*
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* Translates abbreviated numbers in the filter's filter_spec into their
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* fully-expanded forms (e.g., "limit:blob=1k" becomes "limit:blob=1024").
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* Returns a string owned by the list_objects_filter_options object.
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*
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* This form should be used instead of the raw list_objects_filter_spec()
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* value when communicating with a remote process or subprocess.
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*/
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const char *expand_list_objects_filter_spec(
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struct list_objects_filter_options *filter);
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/*
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* Returns the filter spec string more or less in the form as the user
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* entered it. This form of the filter_spec can be used in user-facing
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* messages. Returns a string owned by the list_objects_filter_options
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* object.
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*/
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const char *list_objects_filter_spec(
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struct list_objects_filter_options *filter);
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void list_objects_filter_release(
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struct list_objects_filter_options *filter_options);
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static inline void list_objects_filter_set_no_filter(
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struct list_objects_filter_options *filter_options)
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{
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list_objects_filter_release(filter_options);
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filter_options->no_filter = 1;
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}
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void partial_clone_register(
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const char *remote,
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struct list_objects_filter_options *filter_options);
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void partial_clone_get_default_filter_spec(
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struct list_objects_filter_options *filter_options,
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const char *remote);
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#endif /* LIST_OBJECTS_FILTER_OPTIONS_H */
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