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c0192df630
Both fetch and push support pattern refspecs which allow fetching or pushing references that match a specific pattern. Because these patterns are globs, they have somewhat limited ability to express more complex situations. For example, suppose you wish to fetch all branches from a remote except for a specific one. To allow this, you must setup a set of refspecs which match only the branches you want. Because refspecs are either explicit name matches, or simple globs, many patterns cannot be expressed. Add support for a new type of refspec, referred to as "negative" refspecs. These are prefixed with a '^' and mean "exclude any ref matching this refspec". They can only have one "side" which always refers to the source. During a fetch, this refers to the name of the ref on the remote. During a push, this refers to the name of the ref on the local side. With negative refspecs, users can express more complex patterns. For example: git fetch origin refs/heads/*:refs/remotes/origin/* ^refs/heads/dontwant will fetch all branches on origin into remotes/origin, but will exclude fetching the branch named dontwant. Refspecs today are commutative, meaning that order doesn't expressly matter. Rather than forcing an implied order, negative refspecs will always be applied last. That is, in order to match, a ref must match at least one positive refspec, and match none of the negative refspecs. This is similar to how negative pathspecs work. Signed-off-by: Jacob Keller <jacob.keller@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
#ifndef REFSPEC_H
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#define REFSPEC_H
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#define TAG_REFSPEC "refs/tags/*:refs/tags/*"
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extern const struct refspec_item *tag_refspec;
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/**
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* A struct refspec_item holds the parsed interpretation of a refspec. If it
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* will force updates (starts with a '+'), force is true. If it is a pattern
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* (sides end with '*') pattern is true. If it is a negative refspec, (starts
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* with '^'), negative is true. src and dest are the two sides (including '*'
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* characters if present); if there is only one side, it is src, and dst is
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* NULL; if sides exist but are empty (i.e., the refspec either starts or ends
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* with ':'), the corresponding side is "".
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*
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* remote_find_tracking(), given a remote and a struct refspec_item with either src
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* or dst filled out, will fill out the other such that the result is in the
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* "fetch" specification for the remote (note that this evaluates patterns and
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* returns a single result).
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*/
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struct refspec_item {
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unsigned force : 1;
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unsigned pattern : 1;
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unsigned matching : 1;
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unsigned exact_sha1 : 1;
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unsigned negative : 1;
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char *src;
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char *dst;
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};
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#define REFSPEC_FETCH 1
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#define REFSPEC_PUSH 0
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#define REFSPEC_INIT_FETCH { .fetch = REFSPEC_FETCH }
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#define REFSPEC_INIT_PUSH { .fetch = REFSPEC_PUSH }
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/**
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* An array of strings can be parsed into a struct refspec using
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* parse_fetch_refspec() or parse_push_refspec().
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*/
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struct refspec {
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struct refspec_item *items;
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int alloc;
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int nr;
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const char **raw;
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int raw_alloc;
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int raw_nr;
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int fetch;
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};
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int refspec_item_init(struct refspec_item *item, const char *refspec,
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int fetch);
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void refspec_item_init_or_die(struct refspec_item *item, const char *refspec,
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int fetch);
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void refspec_item_clear(struct refspec_item *item);
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void refspec_init(struct refspec *rs, int fetch);
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void refspec_append(struct refspec *rs, const char *refspec);
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void refspec_appendn(struct refspec *rs, const char **refspecs, int nr);
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void refspec_clear(struct refspec *rs);
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int valid_fetch_refspec(const char *refspec);
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struct strvec;
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/*
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* Determine what <prefix> values to pass to the peer in ref-prefix lines
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* (see Documentation/technical/protocol-v2.txt).
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*/
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void refspec_ref_prefixes(const struct refspec *rs,
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struct strvec *ref_prefixes);
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#endif /* REFSPEC_H */
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