Re: [PATCH v3 04/24] read-cache: clear version in discard_index()

2013-08-20 Thread Junio C Hamano
Thomas Gummerer t.gumme...@gmail.com writes:

 All fields except index_state-version are reset in discard_index.
 Reset the version too.

What is the practical consequence of not clearing this field?  I
somehow have a feeling that this was done deliberately, so that we
can stick to the version of the index file format better, once the
user said update-index --index-version $N to set it up.  I suspect
that the patch would affect a codepath that does read_cache(), calls
discard_index(), populates the index and then does write_cache().
We stick to the version the user specified earlier in our current
code, while the patched code will revert to whatever default built
into your Git binary, no?


 Signed-off-by: Thomas Gummerer t.gumme...@gmail.com
 ---
  read-cache.c | 1 +
  1 file changed, 1 insertion(+)

 diff --git a/read-cache.c b/read-cache.c
 index de0bbcd..1e22f6f 100644
 --- a/read-cache.c
 +++ b/read-cache.c
 @@ -1558,6 +1558,7 @@ int discard_index(struct index_state *istate)
   for (i = 0; i  istate-cache_nr; i++)
   free(istate-cache[i]);
   resolve_undo_clear_index(istate);
 + istate-version = 0;
   istate-cache_nr = 0;
   istate-cache_changed = 0;
   istate-timestamp.sec = 0;
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Re: [PATCH v3 04/24] read-cache: clear version in discard_index()

2013-08-20 Thread Thomas Gummerer
Junio C Hamano gits...@pobox.com writes:

 Thomas Gummerer t.gumme...@gmail.com writes:

 All fields except index_state-version are reset in discard_index.
 Reset the version too.

 What is the practical consequence of not clearing this field?  I
 somehow have a feeling that this was done deliberately, so that we
 can stick to the version of the index file format better, once the
 user said update-index --index-version $N to set it up.  I suspect
 that the patch would affect a codepath that does read_cache(), calls
 discard_index(), populates the index and then does write_cache().
 We stick to the version the user specified earlier in our current
 code, while the patched code will revert to whatever default built
 into your Git binary, no?

Yeah you're right, I missed that use-case.  I'll drop this patch from
the re-roll.  Sorry for the noise.


 Signed-off-by: Thomas Gummerer t.gumme...@gmail.com
 ---
  read-cache.c | 1 +
  1 file changed, 1 insertion(+)

 diff --git a/read-cache.c b/read-cache.c
 index de0bbcd..1e22f6f 100644
 --- a/read-cache.c
 +++ b/read-cache.c
 @@ -1558,6 +1558,7 @@ int discard_index(struct index_state *istate)
  for (i = 0; i  istate-cache_nr; i++)
  free(istate-cache[i]);
  resolve_undo_clear_index(istate);
 +istate-version = 0;
  istate-cache_nr = 0;
  istate-cache_changed = 0;
  istate-timestamp.sec = 0;
--
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[PATCH v3 04/24] read-cache: clear version in discard_index()

2013-08-18 Thread Thomas Gummerer
All fields except index_state-version are reset in discard_index.
Reset the version too.

Signed-off-by: Thomas Gummerer t.gumme...@gmail.com
---
 read-cache.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/read-cache.c b/read-cache.c
index de0bbcd..1e22f6f 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1558,6 +1558,7 @@ int discard_index(struct index_state *istate)
for (i = 0; i  istate-cache_nr; i++)
free(istate-cache[i]);
resolve_undo_clear_index(istate);
+   istate-version = 0;
istate-cache_nr = 0;
istate-cache_changed = 0;
istate-timestamp.sec = 0;
-- 
1.8.3.4.1231.g9fbf354.dirty

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