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rugged_reference.c
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rugged_reference.c
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/*
* The MIT License
*
* Copyright (c) 2014 GitHub, Inc
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "rugged.h"
extern VALUE rb_mRugged;
extern VALUE rb_cRuggedRepo;
VALUE rb_cRuggedReference;
void rb_git_ref__free(git_reference *ref)
{
git_reference_free(ref);
}
VALUE rugged_ref_new(VALUE klass, VALUE owner, git_reference *ref)
{
VALUE rb_ref = Data_Wrap_Struct(klass, NULL, &rb_git_ref__free, ref);
rugged_set_owner(rb_ref, owner);
return rb_ref;
}
/*
* call-seq:
* Reference.valid_name?(ref_name) -> true or false
*
* Check if a reference name is well-formed.
*
* Valid reference names must follow one of two patterns:
*
* 1. Top-level names must contain only capital letters and underscores,
* and must begin and end with a letter. (e.g. "HEAD", "ORIG_HEAD").
* 2. Names prefixed with "refs/" can be almost anything. You must avoid
* the characters '~', '^', ':', '\\', '?', '[', and '*', and the
* sequences ".." and "@{" which have special meaning to revparse.
*
* Returns true if the reference name is valid, false if not.
*/
static VALUE rb_git_ref_valid_name(VALUE klass, VALUE rb_name)
{
Check_Type(rb_name, T_STRING);
return git_reference_is_valid_name(StringValueCStr(rb_name)) == 1 ? Qtrue : Qfalse;
}
/*
* call-seq:
* ref.peel -> oid
*
* Peels tag objects to the sha that they point at. Replicates
* +git show-ref --dereference+.
*/
static VALUE rb_git_ref_peel(VALUE self)
{
/* Leave room for \0 */
git_reference *ref;
git_object *object;
char oid[GIT_OID_HEXSZ + 1];
int error;
Data_Get_Struct(self, git_reference, ref);
error = git_reference_peel(&object, ref, GIT_OBJ_ANY);
if (error == GIT_ENOTFOUND)
return Qnil;
else
rugged_exception_check(error);
if (git_reference_type(ref) == GIT_REF_OID &&
!git_oid_cmp(git_object_id(object), git_reference_target(ref))) {
git_object_free(object);
return Qnil;
} else {
git_oid_tostr(oid, sizeof(oid), git_object_id(object));
git_object_free(object);
return rb_str_new_utf8(oid);
}
}
/*
* call-seq:
* reference.target_id -> id
* reference.target_id -> ref_name
*
* Return the target of +reference+.
*
* If +reference+ is a symbolic reference, it returns the target
* reference object.
*
* If +reference+ is a direct reference, it returns the target object.
*
* ref1.type #=> :symbolic
* ref1.target #=> #<Rugged::Reference ...>
*
* ref2.type #=> :direct
* ref2.target #=> #<Rugged::Commit ...>
*/
static VALUE rb_git_ref_target(VALUE self)
{
git_reference *ref;
Data_Get_Struct(self, git_reference, ref);
if (git_reference_type(ref) == GIT_REF_OID) {
git_object *target;
rugged_exception_check(
git_object_lookup(&target, git_reference_owner(ref), git_reference_target(ref), GIT_OBJ_ANY)
);
return rugged_object_new(rugged_owner(self), target);
} else {
git_reference *target;
rugged_exception_check(
git_reference_lookup(&target, git_reference_owner(ref), git_reference_symbolic_target(ref))
);
return rugged_ref_new(rb_cRuggedReference, rugged_owner(self), target);
}
}
/*
* call-seq:
* reference.target_id -> id
* reference.target_id -> ref_name
*
* Return the target identifier of +reference+.
*
* If +reference+ is a symbolic reference, it returns the canonical
* name of the target reference.
*
* If +reference+ is a direct reference, it returns the sha id of the target.
*
* ref1.type #=> :symbolic
* ref1.target_id #=> "refs/heads/master"
*
* ref2.type #=> :direct
* ref2.target_id #=> "de5ba987198bcf2518885f0fc1350e5172cded78"
*/
static VALUE rb_git_ref_target_id(VALUE self)
{
git_reference *ref;
Data_Get_Struct(self, git_reference, ref);
if (git_reference_type(ref) == GIT_REF_OID) {
return rugged_create_oid(git_reference_target(ref));
} else {
return rb_str_new_utf8(git_reference_symbolic_target(ref));
}
}
/*
* call-seq:
* reference.type -> :symbolic or :direct
*
* Return whether the reference is +:symbolic+ or +:direct+
*/
static VALUE rb_git_ref_type(VALUE self)
{
git_reference *ref;
Data_Get_Struct(self, git_reference, ref);
switch (git_reference_type(ref)) {
case GIT_REF_OID:
return CSTR2SYM("direct");
case GIT_REF_SYMBOLIC:
return CSTR2SYM("symbolic");
default:
return Qnil;
}
}
/*
* call-seq:
* reference.name -> name
* reference.canonical_name -> name
*
* Returns the fully qualified name of the reference.
*
* +name+ gets overwritten in subclasess like Rugged::Branch or Rugged::Tag
* to return "nicer" names for presentational purposes, while +canonical_name+
* is always supposed to return the fully qualified reference path.
*
* reference.name #=> 'HEAD'
*/
static VALUE rb_git_ref_name(VALUE self)
{
git_reference *ref;
Data_Get_Struct(self, git_reference, ref);
return rb_str_new_utf8(git_reference_name(ref));
}
/*
* call-seq:
* reference.resolve -> peeled_ref
*
* Peel a symbolic reference to its target reference.
*
* r1.type #=> :symbolic
* r1.name #=> 'HEAD'
* r1.target #=> 'refs/heads/master'
*
* r2 = r1.resolve #=> #<Rugged::Reference:0x401b3948>
* r2.target #=> '9d09060c850defbc7711d08b57def0d14e742f4e'
*/
static VALUE rb_git_ref_resolve(VALUE self)
{
git_reference *ref;
git_reference *resolved;
int error;
Data_Get_Struct(self, git_reference, ref);
error = git_reference_resolve(&resolved, ref);
rugged_exception_check(error);
return rugged_ref_new(rb_cRuggedReference, rugged_owner(self), resolved);
}
static VALUE reflog_entry_new(const git_reflog_entry *entry)
{
VALUE rb_entry = rb_hash_new();
const char *message;
rb_hash_aset(rb_entry,
CSTR2SYM("id_old"),
rugged_create_oid(git_reflog_entry_id_old(entry))
);
rb_hash_aset(rb_entry,
CSTR2SYM("id_new"),
rugged_create_oid(git_reflog_entry_id_new(entry))
);
rb_hash_aset(rb_entry,
CSTR2SYM("committer"),
rugged_signature_new(git_reflog_entry_committer(entry), NULL)
);
if ((message = git_reflog_entry_message(entry)) != NULL) {
rb_hash_aset(rb_entry, CSTR2SYM("message"), rb_str_new_utf8(message));
}
return rb_entry;
}
/*
* call-seq:
* reference.log -> [reflog_entry, ...]
*
* Return an array with the log of all modifications to this reference
*
* Each +reflog_entry+ is a hash with the following keys:
*
* - +:id_old+: previous OID before the change
* - +:id_new+: OID after the change
* - +:committer+: author of the change
* - +:message+: message for the change
*
* Example:
*
* reference.log #=> [
* # {
* # :id_old => nil,
* # :id_new => '9d09060c850defbc7711d08b57def0d14e742f4e',
* # :committer => {:name => 'Vicent Marti', :email => {'vicent@github.com'}},
* # :message => 'created reference'
* # }, ... ]
*/
static VALUE rb_git_reflog(VALUE self)
{
git_reflog *reflog;
git_reference *ref;
int error;
VALUE rb_log;
size_t i, ref_count;
Data_Get_Struct(self, git_reference, ref);
error = git_reflog_read(&reflog, git_reference_owner(ref), git_reference_name(ref));
rugged_exception_check(error);
ref_count = git_reflog_entrycount(reflog);
rb_log = rb_ary_new2(ref_count);
for (i = 0; i < ref_count; ++i) {
const git_reflog_entry *entry =
git_reflog_entry_byindex(reflog, ref_count - i - 1);
rb_ary_push(rb_log, reflog_entry_new(entry));
}
git_reflog_free(reflog);
return rb_log;
}
/*
* call-seq:
* reference.log? -> true or false
*
* Return +true+ if the reference has a reflog, +false+ otherwise.
*/
static VALUE rb_git_has_reflog(VALUE self)
{
git_reference *ref;
git_repository *repo;
Data_Get_Struct(self, git_reference, ref);
repo = git_reference_owner(ref);
return git_reference_has_log(repo, git_reference_name(ref)) ? Qtrue : Qfalse;
}
/*
* call-seq:
* reference.branch? -> true or false
*
* Returns +true+ if +reference+ is a local branch, false otherwise.
*/
static VALUE rb_git_ref_is_branch(VALUE self)
{
git_reference *ref;
Data_Get_Struct(self, git_reference, ref);
return git_reference_is_branch(ref) ? Qtrue : Qfalse;
}
/*
* call-seq:
* reference.remote? -> true or false
*
* Returns +true+ if +reference+ is a remote branch, false otherwise.
*/
static VALUE rb_git_ref_is_remote(VALUE self)
{
git_reference *ref;
Data_Get_Struct(self, git_reference, ref);
return git_reference_is_remote(ref) ? Qtrue : Qfalse;
}
/*
* call-seq:
* reference.tag? -> true or false
*
* Returns +true+ if +reference+ is a tag, false otherwise.
*/
static VALUE rb_git_ref_is_tag(VALUE self)
{
git_reference *ref;
Data_Get_Struct(self, git_reference, ref);
return git_reference_is_tag(ref) ? Qtrue : Qfalse;
}
void Init_rugged_reference(void)
{
rb_cRuggedReference = rb_define_class_under(rb_mRugged, "Reference", rb_cObject);
rb_define_singleton_method(rb_cRuggedReference, "valid_name?", rb_git_ref_valid_name, 1);
rb_define_method(rb_cRuggedReference, "target", rb_git_ref_target, 0);
rb_define_method(rb_cRuggedReference, "target_id", rb_git_ref_target_id, 0);
rb_define_method(rb_cRuggedReference, "peel", rb_git_ref_peel, 0);
rb_define_method(rb_cRuggedReference, "type", rb_git_ref_type, 0);
rb_define_method(rb_cRuggedReference, "name", rb_git_ref_name, 0);
rb_define_method(rb_cRuggedReference, "canonical_name", rb_git_ref_name, 0);
rb_define_method(rb_cRuggedReference, "resolve", rb_git_ref_resolve, 0);
rb_define_method(rb_cRuggedReference, "branch?", rb_git_ref_is_branch, 0);
rb_define_method(rb_cRuggedReference, "remote?", rb_git_ref_is_remote, 0);
rb_define_method(rb_cRuggedReference, "tag?", rb_git_ref_is_tag, 0);
rb_define_method(rb_cRuggedReference, "log", rb_git_reflog, 0);
rb_define_method(rb_cRuggedReference, "log?", rb_git_has_reflog, 0);
}