Fix regression on ~/.jq being a directory

Makefile.am

@@ -170,23 +170,19 @@ DOC_FILES = docs/content docs/public docs/templates docs/site.yml       \
 
 EXTRA_DIST = $(DOC_FILES) $(man_MANS) $(TESTS) $(TEST_LOG_COMPILER)     \
         jq.1.prebuilt jq.spec src/lexer.c src/lexer.h src/parser.c      \
-        src/parser.h src/version.h src/builtin.jq                       \
-        scripts/version tests/jq.test tests/modules/.jq                 \
+        src/parser.h src/version.h src/builtin.jq scripts/version       \
+        tests/base64.test tests/jq-f-test.sh tests/jq.test              \
         tests/modules/a.jq tests/modules/b/b.jq tests/modules/c/c.jq    \
         tests/modules/c/d.jq tests/modules/data.json                    \
+        tests/modules/home1/.jq tests/modules/home2/.jq/g.jq            \
         tests/modules/lib/jq/e/e.jq tests/modules/lib/jq/f.jq           \
         tests/modules/syntaxerror/syntaxerror.jq                        \
         tests/modules/test_bind_order.jq                                \
         tests/modules/test_bind_order0.jq                               \
         tests/modules/test_bind_order1.jq                               \
         tests/modules/test_bind_order2.jq tests/onig.supp               \
-        tests/onig.test tests/setup tests/torture/input0.json           \
-        tests/optional.test tests/optionaltest                          \
-        tests/utf8-truncate.jq tests/utf8test                           \
-        tests/base64.test tests/base64test                              \
-        tests/jq-f-test.sh tests/shtest
-
-
+        tests/onig.test tests/optional.test tests/setup                 \
+        tests/torture/input0.json tests/utf8-truncate.jq
 
 # README.md is expected in Github projects, good stuff in it, so we'll
 # distribute it and install it with the package in the doc directory.

src/linker.c

@@ -26,7 +26,8 @@ struct lib_loading_state {
   block *defs;
   uint64_t ct;
 };
-static int load_library(jq_state *jq, jv lib_path, int is_data, int raw,
+static int load_library(jq_state *jq, jv lib_path,
+                        int is_data, int raw, int optional,
                         const char *as, block *out_block,
                         struct lib_loading_state *lib_state);
 
@@ -279,7 +280,7 @@ static int process_dependencies(jq_state *jq, jv jq_origin, jv lib_origin, block
     if (is_data) {
       // Can't reuse data libs because the wrong name is bound
       block dep_def_block;
-      nerrors += load_library(jq, resolved, is_data, raw, as_str, &dep_def_block, lib_state);
+      nerrors += load_library(jq, resolved, is_data, raw, optional, as_str, &dep_def_block, lib_state);
       if (nerrors == 0) {
         // Bind as both $data::data and $data for backward compatibility vs common sense
         bk = block_bind_library(dep_def_block, bk, OP_IS_CALL_PSEUDO, as_str);
@@ -298,7 +299,7 @@ static int process_dependencies(jq_state *jq, jv jq_origin, jv lib_origin, block
         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);
+        nerrors += load_library(jq, resolved, is_data, raw, optional, as_str, &dep_def_block, lib_state);
         // resolved has been freed
         if (nerrors == 0) {
           // Bind the library to the program
@@ -317,7 +318,7 @@ static int process_dependencies(jq_state *jq, jv jq_origin, jv lib_origin, block
 
 // 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) {
+static int load_library(jq_state *jq, jv lib_path, int is_data, int raw, int optional, const char *as, block *out_block, struct lib_loading_state *lib_state) {
   int nerrors = 0;
   struct locfile* src = NULL;
   block program;
@@ -328,12 +329,15 @@ static int load_library(jq_state *jq, jv lib_path, int is_data, int raw, const c
     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++;
+    program = gen_noop();
+    if (!optional) {
+      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;
@@ -342,6 +346,7 @@ static int load_library(jq_state *jq, jv lib_path, int is_data, int raw, const c
     // 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);
+    locfile_free(src);
     if (nerrors == 0) {
       char *lib_origin = strdup(jv_string_value(lib_path));
       nerrors += process_dependencies(jq, jq_get_jq_origin(jq),
@@ -356,10 +361,8 @@ static int load_library(jq_state *jq, jv lib_path, int is_data, int raw, const c
   lib_state->defs = jv_mem_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:
+  *out_block = program;
   jv_free(lib_path);
   jv_free(data);
   return nerrors;

tests/modules/home2/.jq/g.jq

@@ -0,0 +1 @@
+def g: 1;

tests/shtest

@@ -218,16 +218,21 @@ clean=true
 
 # Check handling of ~/.jq; these can't move into jq_test.c yet because
 # they depend on $HOME
-if [ "$(HOME="$mods" $VALGRIND $Q $JQ -nr fg)" != foobar ]; then
+if [ "$(HOME="$mods/home1" $VALGRIND $Q $JQ -nr fg)" != foobar ]; then
     echo "Bug #479 appears to be back" 1>&2
     exit 1
 fi
 
-if [ $(HOME="$mods" $VALGRIND $Q $JQ --debug-dump-disasm -n fg | grep '^[a-z]' | wc -l) -gt 3 ]; then
+if [ $(HOME="$mods/home1" $VALGRIND $Q $JQ --debug-dump-disasm -n fg | grep '^[a-z]' | wc -l) -ne 3 ]; then
     echo "Binding too many defs into program" 1>&2
     exit 1
 fi
 
+if ! HOME="$mods/home2" $VALGRIND $Q $JQ -n 'include "g"; empty'; then
+    echo "Mishanding directory ~/.jq" 1>&2
+    exit 1
+fi
+
 cd "$JQBASEDIR" # so that relative library paths are guaranteed correct
 if ! $VALGRIND $Q $JQ -L ./tests/modules -ne 'import "test_bind_order" as check; check::check==true'; then
     echo "Issue #817 regression?" 1>&2