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Merge pull request #1407 from ethomson/tform_small_files

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handle small files in similarity metrics
This commit is contained in:
Edward Thomson 2013-03-11 10:57:19 -07:00
commit eef7e80e68
2 changed files with 57 additions and 2 deletions
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26
src/diff_tform.c
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@ -174,16 +174,34 @@ static int find_similar__hashsig_for_file(
void **out, const git_diff_file *f, const char *path, void *p)
{
git_hashsig_option_t opt = (git_hashsig_option_t)p;
int error = 0;
GIT_UNUSED(f);
return git_hashsig_create_fromfile((git_hashsig **)out, path, opt);
error = git_hashsig_create_fromfile((git_hashsig **)out, path, opt);
if (error == GIT_EBUFS) {
error = 0;
giterr_clear();
}
return error;
}
static int find_similar__hashsig_for_buf(
void **out, const git_diff_file *f, const char *buf, size_t len, void *p)
{
git_hashsig_option_t opt = (git_hashsig_option_t)p;
int error = 0;
GIT_UNUSED(f);
return git_hashsig_create((git_hashsig **)out, buf, len, opt);
error = git_hashsig_create((git_hashsig **)out, buf, len, opt);
if (error == GIT_EBUFS) {
error = 0;
giterr_clear();
}
return error;
}
static void find_similar__hashsig_free(void *sig, void *payload)
@ -414,6 +432,10 @@ static int similarity_measure(
return -1;
if (!cache[b_idx] && similarity_calc(diff, opts, b_idx, cache) < 0)
return -1;
/* some metrics may not wish to process this file (too big / too small) */
if (!cache[a_idx] || !cache[b_idx])
return 0;
/* compare signatures */
if (opts->metric->similarity(

33
tests-clar/diff/rename.c
View File

@ -352,6 +352,39 @@ void test_diff_rename__not_exact_match(void)
git_tree_free(new_tree);
}
void test_diff_rename__handles_small_files(void)
{
const char *tree_sha = "2bc7f351d20b53f1c72c16c4b036e491c478c49a";
git_index *index;
git_tree *tree;
git_diff_list *diff;
git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
git_diff_find_options opts = GIT_DIFF_FIND_OPTIONS_INIT;
cl_git_pass(git_repository_index(&index, g_repo));
tree = resolve_commit_oid_to_tree(g_repo, tree_sha);
cl_git_rewritefile("renames/songof7cities.txt", "single line\n");
cl_git_pass(git_index_add_bypath(index, "songof7cities.txt"));
cl_git_rewritefile("renames/untimely.txt", "untimely\n");
cl_git_pass(git_index_add_bypath(index, "untimely.txt"));
/* Tests that we can invoke find_similar on small files
* and that the GIT_EBUFS (too small) error code is not
* propagated to the caller.
*/
cl_git_pass(git_diff_tree_to_index(&diff, g_repo, tree, index, &diffopts));
opts.flags = GIT_DIFF_FIND_RENAMES | GIT_DIFF_FIND_COPIES | GIT_DIFF_FIND_AND_BREAK_REWRITES;
cl_git_pass(git_diff_find_similar(diff, &opts));
git_diff_list_free(diff);
git_tree_free(tree);
git_index_free(index);
}
void test_diff_rename__working_directory_changes(void)
{
/* let's rewrite some files in the working directory on demand */