--- /dev/null
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+
+#include "blob.h"
+
+#include "git2/common.h"
+#include "git2/object.h"
+#include "git2/repository.h"
+#include "git2/odb_backend.h"
+
+#include "buf.h"
+#include "filebuf.h"
+#include "filter.h"
+
+const void *git_blob_rawcontent(const git_blob *blob)
+{
+ GIT_ASSERT_ARG_WITH_RETVAL(blob, NULL);
+
+ if (blob->raw)
+ return blob->data.raw.data;
+ else
+ return git_odb_object_data(blob->data.odb);
+}
+
+git_object_size_t git_blob_rawsize(const git_blob *blob)
+{
+ GIT_ASSERT_ARG(blob);
+
+ if (blob->raw)
+ return blob->data.raw.size;
+ else
+ return (git_object_size_t)git_odb_object_size(blob->data.odb);
+}
+
+int git_blob__getbuf(git_str *buffer, git_blob *blob)
+{
+ git_object_size_t size = git_blob_rawsize(blob);
+
+ GIT_ERROR_CHECK_BLOBSIZE(size);
+ return git_str_set(buffer, git_blob_rawcontent(blob), (size_t)size);
+}
+
+void git_blob__free(void *_blob)
+{
+ git_blob *blob = (git_blob *) _blob;
+ if (!blob->raw)
+ git_odb_object_free(blob->data.odb);
+ git__free(blob);
+}
+
+int git_blob__parse_raw(void *_blob, const char *data, size_t size)
+{
+ git_blob *blob = (git_blob *) _blob;
+
+ GIT_ASSERT_ARG(blob);
+
+ blob->raw = 1;
+ blob->data.raw.data = data;
+ blob->data.raw.size = size;
+ return 0;
+}
+
+int git_blob__parse(void *_blob, git_odb_object *odb_obj)
+{
+ git_blob *blob = (git_blob *) _blob;
+
+ GIT_ASSERT_ARG(blob);
+
+ git_cached_obj_incref((git_cached_obj *)odb_obj);
+ blob->raw = 0;
+ blob->data.odb = odb_obj;
+ return 0;
+}
+
+int git_blob_create_from_buffer(
+ git_oid *id, git_repository *repo, const void *buffer, size_t len)
+{
+ int error;
+ git_odb *odb;
+ git_odb_stream *stream;
+
+ GIT_ASSERT_ARG(id);
+ GIT_ASSERT_ARG(repo);
+
+ if ((error = git_repository_odb__weakptr(&odb, repo)) < 0 ||
+ (error = git_odb_open_wstream(&stream, odb, len, GIT_OBJECT_BLOB)) < 0)
+ return error;
+
+ if ((error = git_odb_stream_write(stream, buffer, len)) == 0)
+ error = git_odb_stream_finalize_write(id, stream);
+
+ git_odb_stream_free(stream);
+ return error;
+}
+
+static int write_file_stream(
+ git_oid *id, git_odb *odb, const char *path, git_object_size_t file_size)
+{
+ int fd, error;
+ char buffer[GIT_BUFSIZE_FILEIO];
+ git_odb_stream *stream = NULL;
+ ssize_t read_len = -1;
+ git_object_size_t written = 0;
+
+ if ((error = git_odb_open_wstream(
+ &stream, odb, file_size, GIT_OBJECT_BLOB)) < 0)
+ return error;
+
+ if ((fd = git_futils_open_ro(path)) < 0) {
+ git_odb_stream_free(stream);
+ return -1;
+ }
+
+ while (!error && (read_len = p_read(fd, buffer, sizeof(buffer))) > 0) {
+ error = git_odb_stream_write(stream, buffer, read_len);
+ written += read_len;
+ }
+
+ p_close(fd);
+
+ if (written != file_size || read_len < 0) {
+ git_error_set(GIT_ERROR_OS, "failed to read file into stream");
+ error = -1;
+ }
+
+ if (!error)
+ error = git_odb_stream_finalize_write(id, stream);
+
+ git_odb_stream_free(stream);
+ return error;
+}
+
+static int write_file_filtered(
+ git_oid *id,
+ git_object_size_t *size,
+ git_odb *odb,
+ const char *full_path,
+ git_filter_list *fl,
+ git_repository* repo)
+{
+ int error;
+ git_str tgt = GIT_STR_INIT;
+
+ error = git_filter_list__apply_to_file(&tgt, fl, repo, full_path);
+
+ /* Write the file to disk if it was properly filtered */
+ if (!error) {
+ *size = tgt.size;
+
+ error = git_odb_write(id, odb, tgt.ptr, tgt.size, GIT_OBJECT_BLOB);
+ }
+
+ git_str_dispose(&tgt);
+ return error;
+}
+
+static int write_symlink(
+ git_oid *id, git_odb *odb, const char *path, size_t link_size)
+{
+ char *link_data;
+ ssize_t read_len;
+ int error;
+
+ link_data = git__malloc(link_size);
+ GIT_ERROR_CHECK_ALLOC(link_data);
+
+ read_len = p_readlink(path, link_data, link_size);
+ if (read_len != (ssize_t)link_size) {
+ git_error_set(GIT_ERROR_OS, "failed to create blob: cannot read symlink '%s'", path);
+ git__free(link_data);
+ return -1;
+ }
+
+ error = git_odb_write(id, odb, (void *)link_data, link_size, GIT_OBJECT_BLOB);
+ git__free(link_data);
+ return error;
+}
+
+int git_blob__create_from_paths(
+ git_oid *id,
+ struct stat *out_st,
+ git_repository *repo,
+ const char *content_path,
+ const char *hint_path,
+ mode_t hint_mode,
+ bool try_load_filters)
+{
+ int error;
+ struct stat st;
+ git_odb *odb = NULL;
+ git_object_size_t size;
+ mode_t mode;
+ git_str path = GIT_STR_INIT;
+
+ GIT_ASSERT_ARG(hint_path || !try_load_filters);
+
+ if (!content_path) {
+ if (git_repository_workdir_path(&path, repo, hint_path) < 0)
+ return -1;
+
+ content_path = path.ptr;
+ }
+
+ if ((error = git_fs_path_lstat(content_path, &st)) < 0 ||
+ (error = git_repository_odb(&odb, repo)) < 0)
+ goto done;
+
+ if (S_ISDIR(st.st_mode)) {
+ git_error_set(GIT_ERROR_ODB, "cannot create blob from '%s': it is a directory", content_path);
+ error = GIT_EDIRECTORY;
+ goto done;
+ }
+
+ if (out_st)
+ memcpy(out_st, &st, sizeof(st));
+
+ size = st.st_size;
+ mode = hint_mode ? hint_mode : st.st_mode;
+
+ if (S_ISLNK(mode)) {
+ error = write_symlink(id, odb, content_path, (size_t)size);
+ } else {
+ git_filter_list *fl = NULL;
+
+ if (try_load_filters)
+ /* Load the filters for writing this file to the ODB */
+ error = git_filter_list_load(
+ &fl, repo, NULL, hint_path,
+ GIT_FILTER_TO_ODB, GIT_FILTER_DEFAULT);
+
+ if (error < 0)
+ /* well, that didn't work */;
+ else if (fl == NULL)
+ /* No filters need to be applied to the document: we can stream
+ * directly from disk */
+ error = write_file_stream(id, odb, content_path, size);
+ else {
+ /* We need to apply one or more filters */
+ error = write_file_filtered(id, &size, odb, content_path, fl, repo);
+
+ git_filter_list_free(fl);
+ }
+
+ /*
+ * TODO: eventually support streaming filtered files, for files
+ * which are bigger than a given threshold. This is not a priority
+ * because applying a filter in streaming mode changes the final
+ * size of the blob, and without knowing its final size, the blob
+ * cannot be written in stream mode to the ODB.
+ *
+ * The plan is to do streaming writes to a tempfile on disk and then
+ * opening streaming that file to the ODB, using
+ * `write_file_stream`.
+ *
+ * CAREFULLY DESIGNED APIS YO
+ */
+ }
+
+done:
+ git_odb_free(odb);
+ git_str_dispose(&path);
+
+ return error;
+}
+
+int git_blob_create_from_workdir(
+ git_oid *id, git_repository *repo, const char *path)
+{
+ return git_blob__create_from_paths(id, NULL, repo, NULL, path, 0, true);
+}
+
+int git_blob_create_from_disk(
+ git_oid *id, git_repository *repo, const char *path)
+{
+ int error;
+ git_str full_path = GIT_STR_INIT;
+ const char *workdir, *hintpath = NULL;
+
+ if ((error = git_fs_path_prettify(&full_path, path, NULL)) < 0) {
+ git_str_dispose(&full_path);
+ return error;
+ }
+
+ workdir = git_repository_workdir(repo);
+
+ if (workdir && !git__prefixcmp(full_path.ptr, workdir))
+ hintpath = full_path.ptr + strlen(workdir);
+
+ error = git_blob__create_from_paths(
+ id, NULL, repo, git_str_cstr(&full_path), hintpath, 0, !!hintpath);
+
+ git_str_dispose(&full_path);
+ return error;
+}
+
+typedef struct {
+ git_writestream parent;
+ git_filebuf fbuf;
+ git_repository *repo;
+ char *hintpath;
+} blob_writestream;
+
+static int blob_writestream_close(git_writestream *_stream)
+{
+ blob_writestream *stream = (blob_writestream *) _stream;
+
+ git_filebuf_cleanup(&stream->fbuf);
+ return 0;
+}
+
+static void blob_writestream_free(git_writestream *_stream)
+{
+ blob_writestream *stream = (blob_writestream *) _stream;
+
+ git_filebuf_cleanup(&stream->fbuf);
+ git__free(stream->hintpath);
+ git__free(stream);
+}
+
+static int blob_writestream_write(git_writestream *_stream, const char *buffer, size_t len)
+{
+ blob_writestream *stream = (blob_writestream *) _stream;
+
+ return git_filebuf_write(&stream->fbuf, buffer, len);
+}
+
+int git_blob_create_from_stream(git_writestream **out, git_repository *repo, const char *hintpath)
+{
+ int error;
+ git_str path = GIT_STR_INIT;
+ blob_writestream *stream;
+
+ GIT_ASSERT_ARG(out);
+ GIT_ASSERT_ARG(repo);
+
+ stream = git__calloc(1, sizeof(blob_writestream));
+ GIT_ERROR_CHECK_ALLOC(stream);
+
+ if (hintpath) {
+ stream->hintpath = git__strdup(hintpath);
+ GIT_ERROR_CHECK_ALLOC(stream->hintpath);
+ }
+
+ stream->repo = repo;
+ stream->parent.write = blob_writestream_write;
+ stream->parent.close = blob_writestream_close;
+ stream->parent.free = blob_writestream_free;
+
+ if ((error = git_repository__item_path(&path, repo, GIT_REPOSITORY_ITEM_OBJECTS)) < 0
+ || (error = git_str_joinpath(&path, path.ptr, "streamed")) < 0)
+ goto cleanup;
+
+ if ((error = git_filebuf_open_withsize(&stream->fbuf, git_str_cstr(&path), GIT_FILEBUF_TEMPORARY,
+ 0666, 2 * 1024 * 1024)) < 0)
+ goto cleanup;
+
+ *out = (git_writestream *) stream;
+
+cleanup:
+ if (error < 0)
+ blob_writestream_free((git_writestream *) stream);
+
+ git_str_dispose(&path);
+ return error;
+}
+
+int git_blob_create_from_stream_commit(git_oid *out, git_writestream *_stream)
+{
+ int error;
+ blob_writestream *stream = (blob_writestream *) _stream;
+
+ /*
+ * We can make this more officient by avoiding writing to
+ * disk, but for now let's re-use the helper functions we
+ * have.
+ */
+ if ((error = git_filebuf_flush(&stream->fbuf)) < 0)
+ goto cleanup;
+
+ error = git_blob__create_from_paths(out, NULL, stream->repo, stream->fbuf.path_lock,
+ stream->hintpath, 0, !!stream->hintpath);
+
+cleanup:
+ blob_writestream_free(_stream);
+ return error;
+
+}
+
+int git_blob_is_binary(const git_blob *blob)
+{
+ git_str content = GIT_STR_INIT;
+ git_object_size_t size;
+
+ GIT_ASSERT_ARG(blob);
+
+ size = git_blob_rawsize(blob);
+
+ git_str_attach_notowned(&content, git_blob_rawcontent(blob),
+ (size_t)min(size, GIT_FILTER_BYTES_TO_CHECK_NUL));
+ return git_str_is_binary(&content);
+}
+
+int git_blob_data_is_binary(const char *str, size_t len)
+{
+ git_str content = GIT_STR_INIT;
+
+ git_str_attach_notowned(&content, str, len);
+
+ return git_str_is_binary(&content);
+}
+
+int git_blob_filter_options_init(
+ git_blob_filter_options *opts,
+ unsigned int version)
+{
+ GIT_INIT_STRUCTURE_FROM_TEMPLATE(opts, version,
+ git_blob_filter_options, GIT_BLOB_FILTER_OPTIONS_INIT);
+ return 0;
+}
+
+int git_blob_filter(
+ git_buf *out,
+ git_blob *blob,
+ const char *path,
+ git_blob_filter_options *given_opts)
+{
+ git_blob_filter_options opts = GIT_BLOB_FILTER_OPTIONS_INIT;
+ git_filter_options filter_opts = GIT_FILTER_OPTIONS_INIT;
+ git_filter_list *fl = NULL;
+ int error = 0;
+
+ GIT_ASSERT_ARG(blob);
+ GIT_ASSERT_ARG(path);
+ GIT_ASSERT_ARG(out);
+
+ GIT_ERROR_CHECK_VERSION(
+ given_opts, GIT_BLOB_FILTER_OPTIONS_VERSION, "git_blob_filter_options");
+
+ if (given_opts != NULL)
+ memcpy(&opts, given_opts, sizeof(git_blob_filter_options));
+
+ if ((opts.flags & GIT_BLOB_FILTER_CHECK_FOR_BINARY) != 0 &&
+ git_blob_is_binary(blob))
+ return 0;
+
+ if ((opts.flags & GIT_BLOB_FILTER_NO_SYSTEM_ATTRIBUTES) != 0)
+ filter_opts.flags |= GIT_FILTER_NO_SYSTEM_ATTRIBUTES;
+
+ if ((opts.flags & GIT_BLOB_FILTER_ATTRIBUTES_FROM_HEAD) != 0)
+ filter_opts.flags |= GIT_FILTER_ATTRIBUTES_FROM_HEAD;
+
+ if ((opts.flags & GIT_BLOB_FILTER_ATTRIBUTES_FROM_COMMIT) != 0) {
+ filter_opts.flags |= GIT_FILTER_ATTRIBUTES_FROM_COMMIT;
+
+#ifndef GIT_DEPRECATE_HARD
+ if (opts.commit_id)
+ git_oid_cpy(&filter_opts.attr_commit_id, opts.commit_id);
+ else
+#endif
+ git_oid_cpy(&filter_opts.attr_commit_id, &opts.attr_commit_id);
+ }
+
+ if (!(error = git_filter_list_load_ext(
+ &fl, git_blob_owner(blob), blob, path,
+ GIT_FILTER_TO_WORKTREE, &filter_opts))) {
+
+ error = git_filter_list_apply_to_blob(out, fl, blob);
+
+ git_filter_list_free(fl);
+ }
+
+ return error;
+}
+
+/* Deprecated functions */
+
+#ifndef GIT_DEPRECATE_HARD
+int git_blob_create_frombuffer(
+ git_oid *id, git_repository *repo, const void *buffer, size_t len)
+{
+ return git_blob_create_from_buffer(id, repo, buffer, len);
+}
+
+int git_blob_create_fromworkdir(git_oid *id, git_repository *repo, const char *relative_path)
+{
+ return git_blob_create_from_workdir(id, repo, relative_path);
+}
+
+int git_blob_create_fromdisk(git_oid *id, git_repository *repo, const char *path)
+{
+ return git_blob_create_from_disk(id, repo, path);
+}
+
+int git_blob_create_fromstream(
+ git_writestream **out,
+ git_repository *repo,
+ const char *hintpath)
+{
+ return git_blob_create_from_stream(out, repo, hintpath);
+}
+
+int git_blob_create_fromstream_commit(
+ git_oid *out,
+ git_writestream *stream)
+{
+ return git_blob_create_from_stream_commit(out, stream);
+}
+
+int git_blob_filtered_content(
+ git_buf *out,
+ git_blob *blob,
+ const char *path,
+ int check_for_binary_data)
+{
+ git_blob_filter_options opts = GIT_BLOB_FILTER_OPTIONS_INIT;
+
+ if (check_for_binary_data)
+ opts.flags |= GIT_BLOB_FILTER_CHECK_FOR_BINARY;
+ else
+ opts.flags &= ~GIT_BLOB_FILTER_CHECK_FOR_BINARY;
+
+ return git_blob_filter(out, blob, path, &opts);
+}
+#endif
projects / libgit2.git / blobdiff