Patterns in .gitattributes are separated by whitespaces, which makes
it impossible to specify exact spaces in the pattern. '?' can be used
as a workaround, but it matches other characters too. This patch makes
a space following a backslash part of the pattern, not a pattern
separator.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclo...@gmail.com>
---
 Last discussion is [1] although the thread went off topic, so no
 actual discussion.
 
 [1] http://thread.gmane.org/gmane.comp.version-control.git/212631

 Documentation/gitattributes.txt | 6 +++---
 attr.c                          | 8 +++++++-
 t/t0003-attributes.sh           | 5 +++++
 3 files changed, 15 insertions(+), 4 deletions(-)

diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt
index 643c1ba..5d4d386 100644
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -20,9 +20,9 @@ Each line in `gitattributes` file is of form:
 
        pattern attr1 attr2 ...
 
-That is, a pattern followed by an attributes list,
-separated by whitespaces.  When the pattern matches the
-path in question, the attributes listed on the line are given to
+That is, a pattern followed by an attributes list, separated by
+whitespaces that are not quoted by a backslash. When the pattern matches
+the path in question, the attributes listed on the line are given to
 the path.
 
 Each attribute can be in one of these states for a given path:
diff --git a/attr.c b/attr.c
index 8d13d70..699716d 100644
--- a/attr.c
+++ b/attr.c
@@ -209,7 +209,13 @@ static struct match_attr *parse_attr_line(const char 
*line, const char *src,
        if (!*cp || *cp == '#')
                return NULL;
        name = cp;
-       namelen = strcspn(name, blank);
+       namelen = 0;
+       while (name[namelen] != '\0' && !strchr(blank, name[namelen])) {
+               if (name[namelen] == '\\' && name[namelen + 1] != '\0')
+                       namelen += 2;
+               else
+                       namelen++;
+       }
        if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen &&
            starts_with(name, ATTRIBUTE_MACRO_PREFIX)) {
                if (!macro_ok) {
diff --git a/t/t0003-attributes.sh b/t/t0003-attributes.sh
index b9d7947..2f16805 100755
--- a/t/t0003-attributes.sh
+++ b/t/t0003-attributes.sh
@@ -23,6 +23,7 @@ test_expect_success 'setup' '
                echo "offon -test test"
                echo "no notest"
                echo "A/e/F test=A/e/F"
+               echo "A\\ b test=space"
        ) >.gitattributes &&
        (
                echo "g test=a/g" &&
@@ -195,6 +196,10 @@ test_expect_success 'root subdir attribute test' '
        attr_check subdir/a/i unspecified
 '
 
+test_expect_success 'quoting in pattern' '
+       attr_check "A b" space
+'
+
 test_expect_success 'negative patterns' '
        echo "!f test=bar" >.gitattributes &&
        git check-attr test -- '"'"'!f'"'"' 2>errors &&
-- 
1.8.5.2.240.g8478abd

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