Merge branch 'jk/format-patch-quote-special-in-from' into maint

* jk/format-patch-quote-special-in-from:
pretty: quote rfc822 specials in email addresses

diff --git a/pretty.c b/pretty.c
index e1d8a8f414bf052a59fbe78d022e611f44ed8361..13618d82644b72adc6068add826daa72dfe64f38 100644 (file)
--- a/pretty.c
+++ b/pretty.c
@@ -208,6 +208,58 @@ int has_non_ascii(const char *s)
        return 0;
 }
 
+static int is_rfc822_special(char ch)
+{
+       switch (ch) {
+       case '(':
+       case ')':
+       case '<':
+       case '>':
+       case '[':
+       case ']':
+       case ':':
+       case ';':
+       case '@':
+       case ',':
+       case '.':
+       case '"':
+       case '\\':
+               return 1;
+       default:
+               return 0;
+       }
+}
+
+static int has_rfc822_specials(const char *s, int len)
+{
+       int i;
+       for (i = 0; i < len; i++)
+               if (is_rfc822_special(s[i]))
+                       return 1;
+       return 0;
+}
+
+static void add_rfc822_quoted(struct strbuf *out, const char *s, int len)
+{
+       int i;
+
+       /* just a guess, we may have to also backslash-quote */
+       strbuf_grow(out, len + 2);
+
+       strbuf_addch(out, '"');
+       for (i = 0; i < len; i++) {
+               switch (s[i]) {
+               case '"':
+               case '\\':
+                       strbuf_addch(out, '\\');
+                       /* fall through */
+               default:
+                       strbuf_addch(out, s[i]);
+               }
+       }
+       strbuf_addch(out, '"');
+}
+
 static int is_rfc2047_special(char ch)
 {
        return (non_ascii(ch) || (ch == '=') || (ch == '?') || (ch == '_'));
@@ -293,7 +345,14 @@ void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
                        name_tail--;
                display_name_length = name_tail - line;
                strbuf_addstr(sb, "From: ");
-               add_rfc2047(sb, line, display_name_length, encoding);
+               if (!has_rfc822_specials(line, display_name_length)) {
+                       add_rfc2047(sb, line, display_name_length, encoding);
+               } else {
+                       struct strbuf quoted = STRBUF_INIT;
+                       add_rfc822_quoted(&quoted, line, display_name_length);
+                       add_rfc2047(sb, quoted.buf, quoted.len, encoding);
+                       strbuf_release(&quoted);
+               }
                strbuf_add(sb, name_tail, namelen - display_name_length);
                strbuf_addch(sb, '\n');
        } else {

diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index c3cdb5205350985f3362268b0cd63bc59bee2444..dd406c44b509895cac0af3bfa08654823636f78e 100755 (executable)
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -793,4 +793,46 @@ test_expect_success 'format-patch wraps extremely long headers (rfc2047)' '
        test_cmp expect subject
 '
 
+check_author() {
+       echo content >>file &&
+       git add file &&
+       GIT_AUTHOR_NAME=$1 git commit -m author-check &&
+       git format-patch --stdout -1 >patch &&
+       grep ^From: patch >actual &&
+       test_cmp expect actual
+}
+
+cat >expect <<'EOF'
+From: "Foo B. Bar" <author@example.com>
+EOF
+test_expect_success 'format-patch quotes dot in headers' '
+       check_author "Foo B. Bar"
+'
+
+cat >expect <<'EOF'
+From: "Foo \"The Baz\" Bar" <author@example.com>
+EOF
+test_expect_success 'format-patch quotes double-quote in headers' '
+       check_author "Foo \"The Baz\" Bar"
+'
+
+cat >expect <<'EOF'
+From: =?UTF-8?q?"F=C3=B6o=20B.=20Bar"?= <author@example.com>
+EOF
+test_expect_success 'rfc2047-encoded headers also double-quote 822 specials' '
+       check_author "Föo B. Bar"
+'
+
+cat >expect <<'EOF'
+Subject: header with . in it
+EOF
+test_expect_success 'subject lines do not have 822 atom-quoting' '
+       echo content >>file &&
+       git add file &&
+       git commit -m "header with . in it" &&
+       git format-patch -k -1 --stdout >patch &&
+       grep ^Subject: patch >actual &&
+       test_cmp expect actual
+'
+
 test_done