Merge branch 'bc/reflog-fix' into js/reflog-delete

* bc/reflog-fix: (1490 commits)
  builtin-reflog.c: don't install new reflog on write failure
  hash: fix lookup_hash semantics
  gitweb: Better chopping in commit search results
  builtin-tag.c: remove cruft
  git-merge-index documentation: clarify synopsis
  send-email: fix In-Reply-To regression
  git-reset --hard and git-read-tree --reset: fix read_cache_unmerged()
  Teach git-grep --name-only as synonym for -l
  diff: fix java funcname pattern for solaris
  t3404: use configured shell instead of /bin/sh
  git_config_*: don't assume we are parsing a config file
  prefix_path: use is_absolute_path() instead of *orig == '/'
  git-clean: handle errors if removing files fails
  Clarified the meaning of git-add -u in the documentation
  git-clone.sh: properly configure remote even if remote's head is dangling
  git.el: Set process-environment instead of invoking env
  Documentation/git-stash: document options for git stash list
  send-email: squelch warning due to comparing undefined $_ to ""
  cvsexportcommit: be graceful when "cvs status" reorders the arguments
  Rename git-core rpm to just git and rename the meta-pacakge to git-all.
  ...

Conflicts:

	Documentation/git-reflog.txt
	t/t1410-reflog.sh

1 files changed, 203 insertions, 0 deletions

diff --git a/ws.c b/ws.c
new file mode 100644
index 0000000000..d09b9df89a
--- /dev/null
+++ b/ws.c
@@ -0,0 +1,203 @@
+/*
+ * Whitespace rules
+ *
+ * Copyright (c) 2007 Junio C Hamano
+ */
+
+#include "cache.h"
+#include "attr.h"
+
+static struct whitespace_rule {
+	const char *rule_name;
+	unsigned rule_bits;
+} whitespace_rule_names[] = {
+	{ "trailing-space", WS_TRAILING_SPACE },
+	{ "space-before-tab", WS_SPACE_BEFORE_TAB },
+	{ "indent-with-non-tab", WS_INDENT_WITH_NON_TAB },
+};
+
+unsigned parse_whitespace_rule(const char *string)
+{
+	unsigned rule = WS_DEFAULT_RULE;
+
+	while (string) {
+		int i;
+		size_t len;
+		const char *ep;
+		int negated = 0;
+
+		string = string + strspn(string, ", \t\n\r");
+		ep = strchr(string, ',');
+		if (!ep)
+			len = strlen(string);
+		else
+			len = ep - string;
+
+		if (*string == '-') {
+			negated = 1;
+			string++;
+			len--;
+		}
+		if (!len)
+			break;
+		for (i = 0; i < ARRAY_SIZE(whitespace_rule_names); i++) {
+			if (strncmp(whitespace_rule_names[i].rule_name,
+				    string, len))
+				continue;
+			if (negated)
+				rule &= ~whitespace_rule_names[i].rule_bits;
+			else
+				rule |= whitespace_rule_names[i].rule_bits;
+			break;
+		}
+		string = ep;
+	}
+	return rule;
+}
+
+static void setup_whitespace_attr_check(struct git_attr_check *check)
+{
+	static struct git_attr *attr_whitespace;
+
+	if (!attr_whitespace)
+		attr_whitespace = git_attr("whitespace", 10);
+	check[0].attr = attr_whitespace;
+}
+
+unsigned whitespace_rule(const char *pathname)
+{
+	struct git_attr_check attr_whitespace_rule;
+
+	setup_whitespace_attr_check(&attr_whitespace_rule);
+	if (!git_checkattr(pathname, 1, &attr_whitespace_rule)) {
+		const char *value;
+
+		value = attr_whitespace_rule.value;
+		if (ATTR_TRUE(value)) {
+			/* true (whitespace) */
+			unsigned all_rule = 0;
+			int i;
+			for (i = 0; i < ARRAY_SIZE(whitespace_rule_names); i++)
+				all_rule |= whitespace_rule_names[i].rule_bits;
+			return all_rule;
+		} else if (ATTR_FALSE(value)) {
+			/* false (-whitespace) */
+			return 0;
+		} else if (ATTR_UNSET(value)) {
+			/* reset to default (!whitespace) */
+			return whitespace_rule_cfg;
+		} else {
+			/* string */
+			return parse_whitespace_rule(value);
+		}
+	} else {
+		return whitespace_rule_cfg;
+	}
+}
+
+/* The returned string should be freed by the caller. */
+char *whitespace_error_string(unsigned ws)
+{
+	struct strbuf err;
+	strbuf_init(&err, 0);
+	if (ws & WS_TRAILING_SPACE)
+		strbuf_addstr(&err, "trailing whitespace");
+	if (ws & WS_SPACE_BEFORE_TAB) {
+		if (err.len)
+			strbuf_addstr(&err, ", ");
+		strbuf_addstr(&err, "space before tab in indent");
+	}
+	if (ws & WS_INDENT_WITH_NON_TAB) {
+		if (err.len)
+			strbuf_addstr(&err, ", ");
+		strbuf_addstr(&err, "indent with spaces");
+	}
+	return strbuf_detach(&err, NULL);
+}
+
+/* If stream is non-NULL, emits the line after checking. */
+unsigned check_and_emit_line(const char *line, int len, unsigned ws_rule,
+			     FILE *stream, const char *set,
+			     const char *reset, const char *ws)
+{
+	unsigned result = 0;
+	int written = 0;
+	int trailing_whitespace = -1;
+	int trailing_newline = 0;
+	int i;
+
+	/* Logic is simpler if we temporarily ignore the trailing newline. */
+	if (len > 0 && line[len - 1] == '\n') {
+		trailing_newline = 1;
+		len--;
+	}
+
+	/* Check for trailing whitespace. */
+	if (ws_rule & WS_TRAILING_SPACE) {
+		for (i = len - 1; i >= 0; i--) {
+			if (isspace(line[i])) {
+				trailing_whitespace = i;
+				result |= WS_TRAILING_SPACE;
+			}
+			else
+				break;
+		}
+	}
+
+	/* Check for space before tab in initial indent. */
+	for (i = 0; i < len; i++) {
+		if (line[i] == ' ')
+			continue;
+		if (line[i] != '\t')
+			break;
+		if ((ws_rule & WS_SPACE_BEFORE_TAB) && written < i) {
+			result |= WS_SPACE_BEFORE_TAB;
+			if (stream) {
+				fputs(ws, stream);
+				fwrite(line + written, i - written, 1, stream);
+				fputs(reset, stream);
+			}
+		} else if (stream)
+			fwrite(line + written, i - written, 1, stream);
+		if (stream)
+			fwrite(line + i, 1, 1, stream);
+		written = i + 1;
+	}
+
+	/* Check for indent using non-tab. */
+	if ((ws_rule & WS_INDENT_WITH_NON_TAB) && i - written >= 8) {
+		result |= WS_INDENT_WITH_NON_TAB;
+		if (stream) {
+			fputs(ws, stream);
+			fwrite(line + written, i - written, 1, stream);
+			fputs(reset, stream);
+		}
+		written = i;
+	}
+
+	if (stream) {
+		/* Now the rest of the line starts at written.
+		 * The non-highlighted part ends at trailing_whitespace. */
+		if (trailing_whitespace == -1)
+			trailing_whitespace = len;
+
+		/* Emit non-highlighted (middle) segment. */
+		if (trailing_whitespace - written > 0) {
+			fputs(set, stream);
+			fwrite(line + written,
+			    trailing_whitespace - written, 1, stream);
+			fputs(reset, stream);
+		}
+
+		/* Highlight errors in trailing whitespace. */
+		if (trailing_whitespace != len) {
+			fputs(ws, stream);
+			fwrite(line + trailing_whitespace,
+			    len - trailing_whitespace, 1, stream);
+			fputs(reset, stream);
+		}
+		if (trailing_newline)
+			fputc('\n', stream);
+	}
+	return result;
+}