Three kinds of errors can arise from parsing '.git/sequencer/todo':
1. Unrecognized action
2. Missing space after valid action prefix
3. Malformed object name
4. Object name does not refer to a valid commit
Since we would like to make the instruction sheet user-editable in the
future (much like the 'rebase -i' sheet), report more fine-grained
parse errors prefixed with the filename and line number.
Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
Helped-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
Signed-off-by: Ramkumar Ramachandra <artagnon@xxxxxxxxx>
---
builtin/revert.c | 37 ++++++++++++++++++++++++++-----------
1 files changed, 26 insertions(+), 11 deletions(-)
diff --git a/builtin/revert.c b/builtin/revert.c
index 50af439..d106c3c 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -705,11 +705,14 @@ static int format_todo(struct strbuf *buf, struct replay_insn_list *todo_list)
return 0;
}
-static int parse_insn_line(char *bol, char *eol, struct replay_insn_list *item)
+static int parse_insn_line(char *bol, char *eol,
+ struct replay_insn_list *item, int lineno)
{
+ const char *todo_file = git_path(SEQ_TODO_FILE);
unsigned char commit_sha1[20];
char *end_of_object_name;
int saved, status, padding;
+ size_t error_len;
if (!prefixcmp(bol, "pick")) {
item->action = REPLAY_PICK;
@@ -717,13 +720,19 @@ static int parse_insn_line(char *bol, char *eol, struct replay_insn_list *item)
} else if (!prefixcmp(bol, "revert")) {
item->action = REPLAY_REVERT;
bol += strlen("revert");
- } else
- return -1;
+ } else {
+ error_len = eol - bol > 255 ? 255 : eol - bol;
+ return error(_("%s:%d: Unrecognized action: %.*s"),
+ todo_file, lineno, (int)error_len, bol);
+ }
/* Eat up extra spaces/ tabs before object name */
padding = strspn(bol, " \t");
- if (!padding)
- return -1;
+ if (!padding) {
+ error_len = eol - bol > 255 ? 255 : eol - bol;
+ return error(_("%s:%d: Missing space after action: %.*s"),
+ todo_file, lineno, (int)error_len, bol);
+ }
bol += padding;
end_of_object_name = bol + strcspn(bol, " \t\n");
@@ -732,12 +741,18 @@ static int parse_insn_line(char *bol, char *eol, struct replay_insn_list *item)
status = get_sha1(bol, commit_sha1);
*end_of_object_name = saved;
- if (status < 0)
- return -1;
+ if (status < 0) {
+ error_len = eol - bol > 255 ? 255 : eol - bol;
+ return error(_("%s:%d: Malformed object name: %.*s"),
+ todo_file, lineno, (int)error_len, bol);
+ }
item->operand = lookup_commit_reference(commit_sha1);
- if (!item->operand)
- return -1;
+ if (!item->operand) {
+ error_len = eol - bol > 255 ? 255 : eol - bol;
+ return error(_("%s:%d: Not a valid commit: %.*s"),
+ todo_file, lineno, (int)error_len, bol);
+ }
item->next = NULL;
return 0;
@@ -752,8 +767,8 @@ static int parse_insn_buffer(char *buf, struct replay_insn_list **todo_list)
for (i = 1; *p; i++) {
char *eol = strchrnul(p, '\n');
- if (parse_insn_line(p, eol, &item) < 0)
- return error(_("Could not parse line %d."), i);
+ if (parse_insn_line(p, eol, &item, i) < 0)
+ return -1;
next = replay_insn_list_append(item.action, item.operand, next);
p = *eol ? eol + 1 : eol;
}
--
1.7.4.1
--
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