[PATCH 2/2] git-commit-tree: if i18n.commitencoding is utf-8 (default), check it

[Johannes Schindelin <Johannes.Schindelin@xxxxxx>]

Now, git-commit-tree refuses to commit when i18n.commitencoding is
either unset, or set to "utf-8", and the commit message does not
minimally conform to the UTF-8 encoding.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@xxxxxx>
---

	Unfortunately, I could not think of a shorter oneline description. 
	But my next patch fixes at least the output in shortlog.

 builtin-commit-tree.c |   14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/builtin-commit-tree.c b/builtin-commit-tree.c
index 856f3cd..810b440 100644
--- a/builtin-commit-tree.c
+++ b/builtin-commit-tree.c
@@ -7,6 +7,7 @@
 #include "commit.h"
 #include "tree.h"
 #include "builtin.h"
+#include "utf8.h"
 
 #define BLOCKING (1ul << 14)
 
@@ -32,7 +33,7 @@ static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
 	len = vsnprintf(one_line, sizeof(one_line), fmt, args);
 	va_end(args);
 	size = *sizep;
-	newsize = size + len;
+	newsize = size + len + 1;
 	alloc = (size + 32767) & ~32767;
 	buf = *bufp;
 	if (newsize > alloc) {
@@ -40,7 +41,7 @@ static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
 		buf = xrealloc(buf, alloc);
 		*bufp = buf;
 	}
-	*sizep = newsize;
+	*sizep = newsize - 1;
 	memcpy(buf + size, one_line, len);
 }
 
@@ -127,6 +128,15 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix)
 	while (fgets(comment, sizeof(comment), stdin) != NULL)
 		add_buffer(&buffer, &size, "%s", comment);
 
+	/* And check the encoding */
+	buffer[size] = '\0';
+	if (!strcmp(git_commit_encoding, "utf-8") && utf8_strlen(buffer) < 0) {
+		fprintf(stderr, "Commit message does not conform to UTF-8.\n"
+			"Please fix the message,"
+			" or set the config variable i18n.commitencoding.\n");
+		return 1;
+	}
+
 	if (!write_sha1_file(buffer, size, commit_type, commit_sha1)) {
 		printf("%s\n", sha1_to_hex(commit_sha1));
 		return 0;
-- 
1.4.4.3.ge5f98-dirty


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