2 * wc_db_util.c : Various util functions for wc_db(_pdh)
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25 This file is meant to be a stash of fairly low-level functions used by both
26 wc_db.c and wc_db_pdh.c. In breaking stuff out of the monolithic wc_db.c,
27 I have discovered that some utility functions are used by bits in both
28 files. Rather than shoehorn those functions into one file or the other, or
29 create circular dependencies between the files, I felt a third file, with
30 a well-defined scope, would be sensible. History will judge its effect.
32 The goal of it file is simple: just execute SQLite statements. That is,
33 functions in this file should have no knowledge of pdh's or db's, and
34 should just operate on the raw sdb object. If a function requires more
35 information than that, it shouldn't be in here. -hkw
38 #define SVN_WC__I_AM_WC_DB
40 #include "svn_dirent_uri.h"
41 #include "private/svn_sqlite.h"
44 #include "adm_files.h"
45 #include "wc_db_private.h"
46 #include "wc-queries.h"
48 #include "svn_private_config.h"
50 WC_QUERIES_SQL_DECLARE_STATEMENTS(statements);
56 svn_wc__db_util_fetch_wc_id(apr_int64_t *wc_id,
57 svn_sqlite__db_t *sdb,
58 apr_pool_t *scratch_pool)
60 svn_sqlite__stmt_t *stmt;
61 svn_boolean_t have_row;
63 /* ### cheat. we know there is just one WORKING_COPY row, and it has a
64 ### NULL value for local_abspath. */
65 SVN_ERR(svn_sqlite__get_statement(&stmt, sdb, STMT_SELECT_WCROOT_NULL));
66 SVN_ERR(svn_sqlite__step(&have_row, stmt));
68 return svn_error_createf(SVN_ERR_WC_CORRUPT, svn_sqlite__reset(stmt),
69 _("Missing a row in WCROOT."));
71 SVN_ERR_ASSERT(!svn_sqlite__column_is_null(stmt, 0));
72 *wc_id = svn_sqlite__column_int64(stmt, 0);
74 return svn_error_trace(svn_sqlite__reset(stmt));
80 /* An SQLite application defined function that allows SQL queries to
81 use "relpath_depth(local_relpath)". */
83 relpath_depth_sqlite(svn_sqlite__context_t *sctx,
85 svn_sqlite__value_t *values[],
86 apr_pool_t *scratch_pool)
88 const char *path = NULL;
91 if (argc == 1 && svn_sqlite__value_type(values[0]) == SVN_SQLITE__TEXT)
92 path = svn_sqlite__value_text(values[0]);
95 svn_sqlite__result_null(sctx);
99 depth = *path ? 1 : 0;
106 svn_sqlite__result_int64(sctx, depth);
113 svn_wc__db_util_open_db(svn_sqlite__db_t **sdb,
114 const char *dir_abspath,
115 const char *sdb_fname,
116 svn_sqlite__mode_t smode,
117 svn_boolean_t exclusive,
118 const char *const *my_statements,
119 apr_pool_t *result_pool,
120 apr_pool_t *scratch_pool)
122 const char *sdb_abspath = svn_wc__adm_child(dir_abspath, sdb_fname,
125 if (smode != svn_sqlite__mode_rwcreate)
127 svn_node_kind_t kind;
129 /* A file stat is much cheaper then a failed database open handled
131 SVN_ERR(svn_io_check_path(sdb_abspath, &kind, scratch_pool));
133 if (kind != svn_node_file)
134 return svn_error_createf(APR_ENOENT, NULL,
135 _("Working copy database '%s' not found"),
136 svn_dirent_local_style(sdb_abspath,
144 /* A standard SQLite build creates a DB with mode 644 ^ !umask
145 which means the file doesn't have group/world write access
146 even when umask allows it. By ensuring the file exists before
147 SQLite gets involved we give it the permissions allowed by
149 SVN_ERR(svn_io_file_open(&f, sdb_abspath,
150 (APR_READ | APR_WRITE | APR_CREATE),
151 APR_OS_DEFAULT, scratch_pool));
152 SVN_ERR(svn_io_file_close(f, scratch_pool));
156 SVN_ERR(svn_sqlite__open(sdb, sdb_abspath, smode,
157 my_statements ? my_statements : statements,
158 0, NULL, result_pool, scratch_pool));
161 SVN_ERR(svn_sqlite__exec_statements(*sdb, STMT_PRAGMA_LOCKING_MODE));
163 SVN_ERR(svn_sqlite__create_scalar_function(*sdb, "relpath_depth", 1,
164 relpath_depth_sqlite, NULL));
170 /* Some helpful transaction helpers.
172 Instead of directly using SQLite transactions, these wrappers
173 relieve the consumer from the need to wrap the wcroot and
174 local_relpath, which are almost always used within the transaction.
176 This also means if we later want to implement some wc_db-specific txn
177 handling, we have a convenient place to do it.
180 /* A callback which supplies WCROOTs and LOCAL_RELPATHs. */
181 typedef svn_error_t *(*db_txn_callback_t)(void *baton,
182 svn_wc__db_wcroot_t *wcroot,
183 const char *local_relpath,
184 apr_pool_t *scratch_pool);
186 /* Baton for use with run_txn() and with_db_txn(). */
189 svn_wc__db_wcroot_t *wcroot;
190 const char *local_relpath;
192 db_txn_callback_t cb_func;
197 /* Unwrap the sqlite transaction into a wc_db txn.
198 Implements svn_sqlite__transaction_callback_t. */
200 run_txn(void *baton, svn_sqlite__db_t *db, apr_pool_t *scratch_pool)
202 struct txn_baton_t *tb = baton;
204 return svn_error_trace(
205 tb->cb_func(tb->cb_baton, tb->wcroot, tb->local_relpath, scratch_pool));
209 /* Run CB_FUNC in a SQLite transaction with CB_BATON, using WCROOT and
210 LOCAL_RELPATH. If callbacks require additional information, they may
211 provide it using CB_BATON. */
213 svn_wc__db_with_txn(svn_wc__db_wcroot_t *wcroot,
214 const char *local_relpath,
215 svn_wc__db_txn_callback_t cb_func,
217 apr_pool_t *scratch_pool)
219 struct txn_baton_t tb;
222 tb.local_relpath = local_relpath;
223 tb.cb_func = cb_func;
224 tb.cb_baton = cb_baton;
226 return svn_error_trace(
227 svn_sqlite__with_lock(wcroot->sdb, run_txn, &tb, scratch_pool));