thodg/libgit2/examples/for-each-ref.c

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• Hash : ead10785
  Author :
  Date : 2019-01-24T11:31:49
  

  examples: create common lg2 executable
  
  Inside of our networking example code, we have a git2 executable
  that acts as an entry point to all the different network
  examples. As such, it is kind of the same like the normal git(1)
  executable in that it simply arbitrates to the respective
  subcommands.
  
  Let's extend this approach and merge all examples into a single
  standalone lg2 executable. Instead of building an executable
  for all the existing examples we have, we now bundle them all
  inside of the lg2 one and let them be callable via subcommands.
  
  In the process, we can get rid of duplicated library
  initialization, deinitialization and repository discovery code.
  Instead of having each subcommand handle these on its own, we
  simply do it inside of the single main function now.
  

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• examples/for-each-ref.c

• #include <git2.h>
  #include <stdio.h>
  #include "common.h"
  
  static int show_ref(git_reference *ref, void *data)
  {
          git_repository *repo = data;
          git_reference *resolved = NULL;
          char hex[GIT_OID_HEXSZ+1];
          const git_oid *oid;
          git_object *obj;
  
          if (git_reference_type(ref) == GIT_REFERENCE_SYMBOLIC)
                  check_lg2(git_reference_resolve(&resolved, ref),
                            "Unable to resolve symbolic reference",
                            git_reference_name(ref));
  
          oid = git_reference_target(resolved ? resolved : ref);
          git_oid_fmt(hex, oid);
          hex[GIT_OID_HEXSZ] = 0;
          check_lg2(git_object_lookup(&obj, repo, oid, GIT_OBJECT_ANY),
                    "Unable to lookup object", hex);
  
          printf("%s %-6s\t%s\n",
                 hex,
                 git_object_type2string(git_object_type(obj)),
                 git_reference_name(ref));
  
          if (resolved)
                  git_reference_free(resolved);
          return 0;
  }
  
  int lg2_for_each_ref(git_repository *repo, int argc, char **argv)
  {
  	UNUSED(argv);
  
          if (argc != 1)
                  fatal("Sorry, no for-each-ref options supported yet", NULL);
  
          check_lg2(git_reference_foreach(repo, show_ref, repo),
                    "Could not iterate over references", NULL);
  
          return 0;
  }
  

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