1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393
|
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/stat.h>
#include <libgen.h>
#ifdef WIN32
#include <windows.h>
#include <shlwapi.h>
#endif
#include "jq_parser.h"
#include "locfile.h"
#include "jv.h"
#include "jq.h"
#include "parser.h"
#include "util.h"
#include "compile.h"
struct lib_loading_state {
char **names;
block *defs;
uint64_t ct;
};
static int load_library(jq_state *jq, jv lib_path, int is_data, int raw,
const char *as, block *out_block,
struct lib_loading_state *lib_state);
static int path_is_relative(jv p) {
const char *s = jv_string_value(p);
#ifdef WIN32
int res = PathIsRelativeA(s);
#else
int res = *s != '/';
#endif
jv_free(p);
return res;
}
// Given a lib_path to search first, creates a chain of search paths
// in the following order:
// 1. lib_path
// 2. -L paths passed in on the command line (from jq_state*) or builtin list
static jv build_lib_search_chain(jq_state *jq, jv search_path, jv jq_origin, jv lib_origin) {
assert(jv_get_kind(search_path) == JV_KIND_ARRAY);
jv expanded = jv_array();
jv expanded_elt;
jv err = jv_null();
jv_array_foreach(search_path, i, path) {
if (jv_get_kind(path) != JV_KIND_STRING) {
jv_free(path);
continue;
}
path = expand_path(path);
if (!jv_is_valid(path)) {
err = path;
path = jv_null();
continue;
}
if (strcmp(".",jv_string_value(path)) == 0) {
expanded_elt = jv_copy(path);
} else if (strncmp("$ORIGIN/",jv_string_value(path),sizeof("$ORIGIN/") - 1) == 0) {
expanded_elt = jv_string_fmt("%s/%s",
jv_string_value(jq_origin),
jv_string_value(path) + sizeof ("$ORIGIN/") - 1);
} else if (jv_get_kind(lib_origin) == JV_KIND_STRING &&
path_is_relative(jv_copy(path))) {
expanded_elt = jv_string_fmt("%s/%s",
jv_string_value(lib_origin),
jv_string_value(path));
} else {
expanded_elt = path;
path = jv_invalid();
}
expanded = jv_array_append(expanded, expanded_elt);
jv_free(path);
}
jv_free(jq_origin);
jv_free(lib_origin);
jv_free(search_path);
return JV_ARRAY(expanded, err);
}
// Doesn't actually check that name not be an absolute path, and we
// don't have to: we always append relative paths to others (with a '/'
// in between).
static jv validate_relpath(jv name) {
const char *s = jv_string_value(name);
if (strchr(s, '\\')) {
jv res = jv_invalid_with_msg(jv_string_fmt("Modules must be named by relative paths using '/', not '\\' (%s)", s));
jv_free(name);
return res;
}
jv components = jv_string_split(jv_copy(name), jv_string("/"));
jv rp = jv_array_get(jv_copy(components), 0);
components = jv_array_slice(components, 1, jv_array_length(jv_copy(components)));
jv_array_foreach(components, i, x) {
if (!strcmp(jv_string_value(x), "..")) {
jv_free(x);
jv_free(rp);
jv_free(components);
jv res = jv_invalid_with_msg(jv_string_fmt("Relative paths to modules may not traverse to parent directories (%s)", s));
jv_free(name);
return res;
}
if (i > 0 && jv_equal(jv_copy(x), jv_array_get(jv_copy(components), i - 1))) {
jv_free(x);
jv_free(rp);
jv_free(components);
jv res = jv_invalid_with_msg(jv_string_fmt("module names must not have equal consecutive components: %s",
jv_string_value(name)));
jv_free(name);
return res;
}
rp = jv_string_concat(rp, jv_string_concat(jv_string("/"), x));
}
jv_free(components);
jv_free(name);
return rp;
}
// Assumes name has been validated
static jv jv_basename(jv name) {
const char *s = jv_string_value(name);
const char *p = strrchr(s, '/');
if (!p)
return name;
jv res = jv_string_fmt("%s", p);
jv_free(name);
return res;
}
// Asummes validated relative path to module
static jv find_lib(jq_state *jq, jv rel_path, jv search, const char *suffix, jv jq_origin, jv lib_origin) {
if (jv_get_kind(search) != JV_KIND_ARRAY)
return jv_invalid_with_msg(jv_string_fmt("Module search path must be an array"));
if (jv_get_kind(rel_path) != JV_KIND_STRING)
return jv_invalid_with_msg(jv_string_fmt("Module path must be a string"));
struct stat st;
int ret;
// Ideally we should cache this somewhere
search = build_lib_search_chain(jq, search, jq_origin, lib_origin);
jv err = jv_array_get(jv_copy(search), 1);
search = jv_array_get(search, 0);
jv bname = jv_basename(jv_copy(rel_path));
jv_array_foreach(search, i, spath) {
if (jv_get_kind(spath) == JV_KIND_NULL) {
jv_free(spath);
break;
}
if (jv_get_kind(spath) != JV_KIND_STRING ||
strcmp(jv_string_value(spath), "") == 0) {
jv_free(spath);
continue; /* XXX report non-strings in search path?? */
}
// Try ${search_dir}/${rel_path}.jq
jv testpath = jq_realpath(jv_string_fmt("%s/%s%s",
jv_string_value(spath),
jv_string_value(rel_path),
suffix));
ret = stat(jv_string_value(testpath),&st);
if (ret == -1 && errno == ENOENT) {
jv_free(testpath);
// Try ${search_dir}/$(dirname ${rel_path})/jq/main.jq
testpath = jq_realpath(jv_string_fmt("%s/%s/%s%s",
jv_string_value(spath),
jv_string_value(rel_path),
"jq/main",
suffix));
ret = stat(jv_string_value(testpath),&st);
}
if (ret == -1 && errno == ENOENT) {
jv_free(testpath);
// Try ${search_dir}/${rel_path}/$(basename ${rel_path}).jq
testpath = jq_realpath(jv_string_fmt("%s/%s/%s%s",
jv_string_value(spath),
jv_string_value(rel_path),
jv_string_value(bname),
suffix));
ret = stat(jv_string_value(testpath),&st);
}
if (ret == 0) {
jv_free(err);
jv_free(rel_path);
jv_free(search);
jv_free(bname);
jv_free(spath);
return testpath;
}
jv_free(testpath);
jv_free(spath);
}
jv output;
if (!jv_is_valid(err)) {
err = jv_invalid_get_msg(err);
output = jv_invalid_with_msg(jv_string_fmt("module not found: %s (%s)",
jv_string_value(rel_path),
jv_string_value(err)));
} else {
output = jv_invalid_with_msg(jv_string_fmt("module not found: %s",
jv_string_value(rel_path)));
}
jv_free(err);
jv_free(rel_path);
jv_free(search);
jv_free(bname);
return output;
}
static jv default_search(jq_state *jq, jv value) {
if (!jv_is_valid(value)) {
// dependent didn't say; prepend . to system search path listj
jv_free(value);
return jv_array_concat(JV_ARRAY(jv_string(".")), jq_get_lib_dirs(jq));
}
if (jv_get_kind(value) != JV_KIND_ARRAY)
return JV_ARRAY(value);
return value;
}
// XXX Split this into a util that takes a callback, and then...
static int process_dependencies(jq_state *jq, jv jq_origin, jv lib_origin, block *src_block, struct lib_loading_state *lib_state) {
jv deps = block_take_imports(src_block);
block bk = *src_block;
int nerrors = 0;
const char *as_str = NULL;
jv_array_foreach(deps, i, dep) {
int is_data = jv_get_kind(jv_object_get(jv_copy(dep), jv_string("is_data"))) == JV_KIND_TRUE;
int raw = 0;
jv v = jv_object_get(jv_copy(dep), jv_string("raw"));
if (jv_get_kind(v) == JV_KIND_TRUE)
raw = 1;
jv_free(v);
jv relpath = validate_relpath(jv_object_get(jv_copy(dep), jv_string("relpath")));
jv as = jv_object_get(jv_copy(dep), jv_string("as"));
assert(!jv_is_valid(as) || jv_get_kind(as) == JV_KIND_STRING);
if (jv_get_kind(as) == JV_KIND_STRING)
as_str = jv_string_value(as);
jv search = default_search(jq, jv_object_get(dep, jv_string("search")));
// dep is now freed; do not reuse
// find_lib does a lot of work that could be cached...
jv resolved = find_lib(jq, relpath, search, is_data ? ".json" : ".jq", jv_copy(jq_origin), jv_copy(lib_origin));
// XXX ...move the rest of this into a callback.
if (!jv_is_valid(resolved)) {
jv emsg = jv_invalid_get_msg(resolved);
jq_report_error(jq, jv_string_fmt("jq: error: %s\n",jv_string_value(emsg)));
jv_free(emsg);
jv_free(as);
jv_free(deps);
jv_free(jq_origin);
jv_free(lib_origin);
return 1;
}
uint64_t state_idx = 0;
for (; state_idx < lib_state->ct; ++state_idx) {
if (strcmp(lib_state->names[state_idx],jv_string_value(resolved)) == 0)
break;
}
if (state_idx < lib_state->ct) { // Found
jv_free(resolved);
// Bind the library to the program
bk = block_bind_library(lib_state->defs[state_idx], bk, OP_IS_CALL_PSEUDO, as_str);
} else { // Not found. Add it to the table before binding.
block dep_def_block = gen_noop();
nerrors += load_library(jq, resolved, is_data, raw, as_str, &dep_def_block, lib_state);
// resolved has been freed
if (nerrors == 0) {
// Bind the library to the program
bk = block_bind_library(dep_def_block, bk, OP_IS_CALL_PSEUDO, as_str);
}
}
jv_free(as);
}
jv_free(lib_origin);
jv_free(jq_origin);
jv_free(deps);
return nerrors;
}
// Loads the library at lib_path into lib_state, putting the library's defs
// into *out_block
static int load_library(jq_state *jq, jv lib_path, int is_data, int raw, const char *as, block *out_block, struct lib_loading_state *lib_state) {
int nerrors = 0;
struct locfile* src = NULL;
block program;
jv data;
if (is_data && !raw)
data = jv_load_file(jv_string_value(lib_path), 0);
else
data = jv_load_file(jv_string_value(lib_path), 1);
int state_idx;
if (!jv_is_valid(data)) {
if (jv_invalid_has_msg(jv_copy(data)))
data = jv_invalid_get_msg(data);
else
data = jv_string("unknown error");
jq_report_error(jq, jv_string_fmt("jq: error loading data file %s: %s\n", jv_string_value(lib_path), jv_string_value(data)));
nerrors++;
goto out;
} else if (is_data) {
// import "foo" as $bar;
program = gen_const_global(jv_copy(data), as);
} else {
// import "foo" as bar;
src = locfile_init(jq, jv_string_value(lib_path), jv_string_value(data), jv_string_length_bytes(jv_copy(data)));
nerrors += jq_parse_library(src, &program);
if (nerrors == 0) {
char *lib_origin = strdup(jv_string_value(lib_path));
nerrors += process_dependencies(jq, jq_get_jq_origin(jq),
jv_string(dirname(lib_origin)),
&program, lib_state);
free(lib_origin);
}
}
state_idx = lib_state->ct++;
lib_state->names = realloc(lib_state->names, lib_state->ct * sizeof(const char *));
lib_state->defs = realloc(lib_state->defs, lib_state->ct * sizeof(block));
lib_state->names[state_idx] = strdup(jv_string_value(lib_path));
lib_state->defs[state_idx] = program;
*out_block = program;
if (src)
locfile_free(src);
out:
jv_free(lib_path);
jv_free(data);
return nerrors;
}
// FIXME It'd be nice to have an option to search the same search path
// as we do in process_dependencies.
jv load_module_meta(jq_state *jq, jv mod_relpath) {
// We can't know the caller's origin; we could though, if it was passed in
jv lib_path = find_lib(jq, validate_relpath(mod_relpath), jq_get_lib_dirs(jq), ".jq", jq_get_jq_origin(jq), jv_null());
if (!jv_is_valid(lib_path))
return lib_path;
jv meta = jv_null();
jv data = jv_load_file(jv_string_value(lib_path), 1);
if (jv_is_valid(data)) {
block program;
struct locfile* src = locfile_init(jq, jv_string_value(lib_path), jv_string_value(data), jv_string_length_bytes(jv_copy(data)));
int nerrors = jq_parse_library(src, &program);
if (nerrors == 0) {
meta = block_module_meta(program);
if (jv_get_kind(meta) == JV_KIND_NULL)
meta = jv_object();
meta = jv_object_set(meta, jv_string("deps"), block_take_imports(&program));
}
locfile_free(src);
block_free(program);
}
jv_free(lib_path);
jv_free(data);
return meta;
}
int load_program(jq_state *jq, struct locfile* src, block *out_block) {
int nerrors = 0;
block program;
struct lib_loading_state lib_state = {0,0,0};
nerrors = jq_parse(src, &program);
if (nerrors)
return nerrors;
nerrors = process_dependencies(jq, jq_get_jq_origin(jq), jq_get_prog_origin(jq), &program, &lib_state);
block libs = gen_noop();
for (uint64_t i = 0; i < lib_state.ct; ++i) {
free(lib_state.names[i]);
if (nerrors == 0 && !block_is_const(lib_state.defs[i]))
libs = block_join(libs, lib_state.defs[i]);
else
block_free(lib_state.defs[i]);
}
free(lib_state.names);
free(lib_state.defs);
if (nerrors)
block_free(program);
else
*out_block = block_drop_unreferenced(block_join(libs, program));
return nerrors;
}
|