"Sverre Rabbelier" <alturin@xxxxxxxxx> writes:
> On Sat, May 17, 2008 at 4:44 PM, Steven Walter <stevenrwalter@xxxxxxxxx> wrote:
>> With this dedication to backwards-compatibility, we'll be at Windows
>> Vista quality in no time.
>
> I very much agree here, given the nature of scripts (that is, being
> very easy to update), I think we should try not to be too strict in
> backwards-compatibility or we'll lose the flexibility that is very
> much needed when developing a Good Product (tm) As long as such
> compatibility breaking changes are marked (in BIG LETTERS) in the
> changelog/release notes I think that would be a 'sacrifice' we should
> consider making.
Don't feed the troll by responding to a cheap shot.
The plumbing output is sacred as it is an API. We _could_ change it if it
is broken in such a way that it cannot convey necessary information fully,
but we just do not _reword_ for the sake of rewording. If somebody does
not like it, s/he is complaining too late. S/he should have been here in
early May 2005 and make the language used by the API closer to what humans
read. S/he wasn't here. Too bad, and it is too late.
And people who complain should look at a bigger picture. Look at what was
suggested by one of them and think for five seconds:
$ git checkout mytopic
-fatal: Entry 'frotz' not uptodate. Cannot merge.
+fatal: Entry 'frotz' has local changes. Cannot merge.
If you do not see something wrong with this output, your brain has already
been rotten with use of git for too long a time. Nobody asked us to
"merge" but why are we talking about "Cannot merge"?
Try a different approach along this patch instead.
$ git-checkout pu
error: You have local changes to 'Makefile'; cannot switch branches.
There are other places that ask unpack_trees() to n-way merge, detect
issues _and_ let it issue error message on its own, which people who
complained in this thread can identify and improve, but I did this as a
demonstration and replaced only one message.
Yes I know about C99 structure initializers. I'd love to use them but we
try to be nice to compilers without it.
builtin-checkout.c | 2 ++
unpack-trees.c | 47 +++++++++++++++++++++++++++++++++--------------
unpack-trees.h | 9 +++++++++
3 files changed, 44 insertions(+), 14 deletions(-)
diff --git a/builtin-checkout.c b/builtin-checkout.c
index 10ec137..83da7ca 100644
--- a/builtin-checkout.c
+++ b/builtin-checkout.c
@@ -236,6 +236,8 @@ static int merge_working_tree(struct checkout_opts *opts,
topts.src_index = &the_index;
topts.dst_index = &the_index;
+ topts.msgs.not_uptodate_file = "You have local changes to '%s'; cannot switch branches.";
+
refresh_cache(REFRESH_QUIET);
if (unmerged_cache()) {
diff --git a/unpack-trees.c b/unpack-trees.c
index 1ab28fd..bec12dc 100644
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -8,6 +8,28 @@
#include "progress.h"
#include "refs.h"
+static struct unpack_trees_error_msgs unpack_default_errors = {
+ /* would_overwrite */
+ "Entry '%s' would be overwritten by merge. Cannot merge.",
+
+ /* not_uptodate_file */
+ "Entry '%s' not uptodate. Cannot merge.",
+
+ /* not_uptodate_dir */
+ "Updating '%s' would lose untracked files in it",
+
+ /* would_lose_untracked */
+ "Untracked working tree file '%s' would be %s by merge.",
+
+ /* bind_overlap */
+ "Entry '%s' overlaps with '%s'. Cannot bind.",
+};
+
+#define ERRORMSG(o,fld) \
+ ( ((o) && (o)->msgs.fld) \
+ ? ((o)->msgs.fld) \
+ : (unpack_default_errors.fld) )
+
static void add_entry(struct unpack_trees_options *o, struct cache_entry *ce,
unsigned int set, unsigned int clear)
{
@@ -383,10 +405,9 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
/* Here come the merge functions */
-static int reject_merge(struct cache_entry *ce)
+static int reject_merge(struct cache_entry *ce, struct unpack_trees_options *o)
{
- return error("Entry '%s' would be overwritten by merge. Cannot merge.",
- ce->name);
+ return error(ERRORMSG(o, would_overwrite), ce->name);
}
static int same(struct cache_entry *a, struct cache_entry *b)
@@ -430,7 +451,7 @@ static int verify_uptodate(struct cache_entry *ce,
if (errno == ENOENT)
return 0;
return o->gently ? -1 :
- error("Entry '%s' not uptodate. Cannot merge.", ce->name);
+ error(ERRORMSG(o, not_uptodate_file), ce->name);
}
static void invalidate_ce_path(struct cache_entry *ce, struct unpack_trees_options *o)
@@ -517,8 +538,7 @@ static int verify_clean_subdirectory(struct cache_entry *ce, const char *action,
i = read_directory(&d, ce->name, pathbuf, namelen+1, NULL);
if (i)
return o->gently ? -1 :
- error("Updating '%s' would lose untracked files in it",
- ce->name);
+ error(ERRORMSG(o, not_uptodate_dir), ce->name);
free(pathbuf);
return cnt;
}
@@ -618,8 +638,7 @@ static int verify_absent(struct cache_entry *ce, const char *action,
}
return o->gently ? -1 :
- error("Untracked working tree file '%s' "
- "would be %s by merge.", ce->name, action);
+ error(ERRORMSG(o, would_lose_untracked), ce->name, action);
}
return 0;
}
@@ -751,7 +770,7 @@ int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o)
/* #14, #14ALT, #2ALT */
if (remote && !df_conflict_head && head_match && !remote_match) {
if (index && !same(index, remote) && !same(index, head))
- return o->gently ? -1 : reject_merge(index);
+ return o->gently ? -1 : reject_merge(index, o);
return merged_entry(remote, index, o);
}
/*
@@ -759,7 +778,7 @@ int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o)
* make sure that it matches head.
*/
if (index && !same(index, head))
- return o->gently ? -1 : reject_merge(index);
+ return o->gently ? -1 : reject_merge(index, o);
if (head) {
/* #5ALT, #15 */
@@ -901,11 +920,11 @@ int twoway_merge(struct cache_entry **src, struct unpack_trees_options *o)
else {
/* all other failures */
if (oldtree)
- return o->gently ? -1 : reject_merge(oldtree);
+ return o->gently ? -1 : reject_merge(oldtree, o);
if (current)
- return o->gently ? -1 : reject_merge(current);
+ return o->gently ? -1 : reject_merge(current, o);
if (newtree)
- return o->gently ? -1 : reject_merge(newtree);
+ return o->gently ? -1 : reject_merge(newtree, o);
return -1;
}
}
@@ -931,7 +950,7 @@ int bind_merge(struct cache_entry **src,
o->merge_size);
if (a && old)
return o->gently ? -1 :
- error("Entry '%s' overlaps with '%s'. Cannot bind.", a->name, old->name);
+ error(ERRORMSG(o, bind_overlap), a->name, old->name);
if (!a)
return keep_entry(old, o);
else
diff --git a/unpack-trees.h b/unpack-trees.h
index d436d6c..94e5672 100644
--- a/unpack-trees.h
+++ b/unpack-trees.h
@@ -8,6 +8,14 @@ struct unpack_trees_options;
typedef int (*merge_fn_t)(struct cache_entry **src,
struct unpack_trees_options *options);
+struct unpack_trees_error_msgs {
+ const char *would_overwrite;
+ const char *not_uptodate_file;
+ const char *not_uptodate_dir;
+ const char *would_lose_untracked;
+ const char *bind_overlap;
+};
+
struct unpack_trees_options {
unsigned int reset:1,
merge:1,
@@ -23,6 +31,7 @@ struct unpack_trees_options {
int pos;
struct dir_struct *dir;
merge_fn_t fn;
+ struct unpack_trees_error_msgs msgs;
int head_idx;
int merge_size;
--
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