From: Bruno Haible <bruno@clisp.org>
Date: Sun, 1 Jun 2025 23:01:50 +0000 (+0200)
Subject: xgettext: Go: Improve heuristic for format strings.
X-Git-Tag: v0.26~133
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=417ca6acd579d18c16a0313e157cc08f3e6af271;p=thirdparty%2Fgettext.git

xgettext: Go: Improve heuristic for format strings.

* gettext-tools/src/format-go.c (struct spec): Add field
'likely_intentional_directives'.
(format_parse): Set it to the number of directives that don't contain a space.
(format_is_unlikely_intentional): New function.
(formatstring_go): Use it.
* gettext-tools/tests/format-go-3: New file.
* gettext-tools/tests/Makefile.am (TESTS): Add it.
---

diff --git a/gettext-tools/src/format-go.c b/gettext-tools/src/format-go.c
index 259a3b397..dcf88e127 100644
--- a/gettext-tools/src/format-go.c
+++ b/gettext-tools/src/format-go.c
@@ -93,6 +93,11 @@ struct numbered_arg
 struct spec
 {
   unsigned int directives;
+  /* We consider a directive as "likely intentional" if it does not contain a
+     space.  This prevents xgettext from flagging strings like "100% complete"
+     as 'go-format' if they don't occur in a context that requires a format
+     string.  */
+  unsigned int likely_intentional_directives;
   unsigned int numbered_arg_count;
   struct numbered_arg *numbered;
 };
@@ -121,6 +126,7 @@ format_parse (const char *format, bool translated, char *fdi,
   unsigned int number;
 
   spec.directives = 0;
+  spec.likely_intentional_directives = 0;
   spec.numbered_arg_count = 0;
   spec.numbered = NULL;
   allocated = 0;
@@ -131,6 +137,7 @@ format_parse (const char *format, bool translated, char *fdi,
       {
         /* A directive.  */
         enum format_arg_type type;
+        bool likely_intentional = true;
 
         FDI_SET (format - 1, FMTDIR_START);
         spec.directives++;
@@ -138,7 +145,11 @@ format_parse (const char *format, bool translated, char *fdi,
         /* Parse flags.  */
         while (*format == ' ' || *format == '+' || *format == '-'
                || *format == '#' || *format == '0')
-          format++;
+          {
+            if (*format == ' ')
+              likely_intentional = false;
+            format++;
+          }
 
         if (*format == '[')
           {
@@ -452,6 +463,8 @@ format_parse (const char *format, bool translated, char *fdi,
             number++;
           }
 
+        if (likely_intentional)
+          spec.likely_intentional_directives++;
         FDI_SET (format, FMTDIR_END);
 
         format++;
@@ -529,6 +542,14 @@ format_get_number_of_directives (void *descr)
   return spec->directives;
 }
 
+static bool
+format_is_unlikely_intentional (void *descr)
+{
+  struct spec *spec = (struct spec *) descr;
+
+  return spec->likely_intentional_directives == 0;
+}
+
 static bool
 format_check (void *msgid_descr, void *msgstr_descr, bool equality,
               formatstring_error_logger_t error_logger, void *error_logger_data,
@@ -619,7 +640,7 @@ struct formatstring_parser formatstring_go =
   format_parse,
   format_free,
   format_get_number_of_directives,
-  NULL,
+  format_is_unlikely_intentional,
   format_check
 };
 
diff --git a/gettext-tools/tests/Makefile.am b/gettext-tools/tests/Makefile.am
index b35ae6066..8d70da071 100644
--- a/gettext-tools/tests/Makefile.am
+++ b/gettext-tools/tests/Makefile.am
@@ -204,7 +204,7 @@ TESTS = gettext-1 gettext-2 \
 	format-elisp-1 format-elisp-2 format-elisp-3 \
 	format-gcc-internal-1 format-gcc-internal-2 \
 	format-gfc-internal-1 format-gfc-internal-2 \
-	format-go-1 format-go-2 \
+	format-go-1 format-go-2 format-go-3 \
 	format-java-1 format-java-2 \
 	format-java-printf-1 format-java-printf-2 \
 	format-javascript-1 format-javascript-2 \
diff --git a/gettext-tools/tests/format-go-3 b/gettext-tools/tests/format-go-3
new file mode 100755
index 000000000..a15fbe9b8
--- /dev/null
+++ b/gettext-tools/tests/format-go-3
@@ -0,0 +1,51 @@
+#! /bin/sh
+. "${srcdir=.}/init.sh"; path_prepend_ . ../src
+
+# Test heuristic recognition of Go format strings like "100% complete".
+
+cat <<\EOF > f-go-3.go
+import "fmt"
+func main () {
+    Gettext("Test 1a is 100% complete");
+    fmt.Println(Gettext("Test 1b is 100% complete"), 120);
+    Gettext("Test 2a from 0% complete to 100% complete");
+    fmt.Println(Gettext("Test 2b from 0% complete to 100% complete"), 120, 121);
+    Gettext("Test 3a of %s is 100% complete");
+    fmt.Println(Gettext("Test 3b of %s is 100% complete"), "foo", 120);
+}
+EOF
+
+: ${XGETTEXT=xgettext}
+${XGETTEXT} --flag=Println:1:go-format \
+            --omit-header --no-location -d f-go-3.tmp f-go-3.go || Exit 1
+LC_ALL=C tr -d '\r' < f-go-3.tmp.po > f-go-3.po || Exit 1
+
+cat <<\EOF > f-go-3.ok
+msgid "Test 1a is 100% complete"
+msgstr ""
+
+#, go-format
+msgid "Test 1b is 100% complete"
+msgstr ""
+
+msgid "Test 2a from 0% complete to 100% complete"
+msgstr ""
+
+#, go-format
+msgid "Test 2b from 0% complete to 100% complete"
+msgstr ""
+
+#, go-format
+msgid "Test 3a of %s is 100% complete"
+msgstr ""
+
+#, go-format
+msgid "Test 3b of %s is 100% complete"
+msgstr ""
+EOF
+
+: ${DIFF=diff}
+${DIFF} f-go-3.ok f-go-3.po
+result=$?
+
+exit $result