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git/resolve-undo.c

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resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
#include "cache.h"
resolve-undo: "checkout -m path" uses resolve-undo information Once you resolved conflicts by "git add path", you cannot recreate the conflicted state with "git checkout -m path", because you lost information from higher stages in the index when you resolved them. Since we record the necessary information in the resolve-undo index extension these days, we can reproduce the unmerged state in the index and check it out. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 03:57:11 +08:00
#include "dir.h"
resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
#include "resolve-undo.h"
#include "string-list.h"
/* The only error case is to run out of memory in string-list */
void record_resolve_undo(struct index_state *istate, struct cache_entry *ce)
{
struct string_list_item *lost;
struct resolve_undo_info *ui;
struct string_list *resolve_undo;
int stage = ce_stage(ce);
if (!stage)
return;
if (!istate->resolve_undo) {
resolve_undo = xcalloc(1, sizeof(*resolve_undo));
resolve_undo->strdup_strings = 1;
istate->resolve_undo = resolve_undo;
}
resolve_undo = istate->resolve_undo;
string_list: Fix argument order for string_list_insert Update the definition and callers of string_list_insert to use the string_list as the first argument. This helps make the string_list API easier to use by being more consistent. Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-06-26 07:41:35 +08:00
lost = string_list_insert(resolve_undo, ce->name);
resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
if (!lost->util)
lost->util = xcalloc(1, sizeof(*ui));
ui = lost->util;
hashcpy(ui->sha1[stage - 1], ce->sha1);
ui->mode[stage - 1] = ce->ce_mode;
}
Convert the users of for_each_string_list to for_each_string_list_item macro The rule for selecting the candidates for conversion is: if the callback function returns only 0 (the condition for for_each_string_list to exit early), than it can be safely converted to the macro. A notable exception are the callers in builtin/remote.c. If converted, the readability in the file will suffer greately. Besides, the code is not very performance critical (at the moment, at least): it does output formatting of the list of remotes. Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-07-03 20:41:54 +08:00
void resolve_undo_write(struct strbuf *sb, struct string_list *resolve_undo)
resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
{
Convert the users of for_each_string_list to for_each_string_list_item macro The rule for selecting the candidates for conversion is: if the callback function returns only 0 (the condition for for_each_string_list to exit early), than it can be safely converted to the macro. A notable exception are the callers in builtin/remote.c. If converted, the readability in the file will suffer greately. Besides, the code is not very performance critical (at the moment, at least): it does output formatting of the list of remotes. Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-07-03 20:41:54 +08:00
struct string_list_item *item;
for_each_string_list_item(item, resolve_undo) {
struct resolve_undo_info *ui = item->util;
int i;
resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
Convert the users of for_each_string_list to for_each_string_list_item macro The rule for selecting the candidates for conversion is: if the callback function returns only 0 (the condition for for_each_string_list to exit early), than it can be safely converted to the macro. A notable exception are the callers in builtin/remote.c. If converted, the readability in the file will suffer greately. Besides, the code is not very performance critical (at the moment, at least): it does output formatting of the list of remotes. Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-07-03 20:41:54 +08:00
if (!ui)
resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
continue;
Convert the users of for_each_string_list to for_each_string_list_item macro The rule for selecting the candidates for conversion is: if the callback function returns only 0 (the condition for for_each_string_list to exit early), than it can be safely converted to the macro. A notable exception are the callers in builtin/remote.c. If converted, the readability in the file will suffer greately. Besides, the code is not very performance critical (at the moment, at least): it does output formatting of the list of remotes. Signed-off-by: Alex Riesen <raa.lkml@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-07-03 20:41:54 +08:00
strbuf_addstr(sb, item->string);
strbuf_addch(sb, 0);
for (i = 0; i < 3; i++)
strbuf_addf(sb, "%o%c", ui->mode[i], 0);
for (i = 0; i < 3; i++) {
if (!ui->mode[i])
continue;
strbuf_add(sb, ui->sha1[i], 20);
}
resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
}
}
build: make code "-Wpointer-arith" clean Recently introduced resolve_undo_read() expected arithmetic to (void *) to work on byte-addresses. Correct this. Noticed by Brandon Casey. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-02 14:04:03 +08:00
struct string_list *resolve_undo_read(const char *data, unsigned long size)
resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
{
struct string_list *resolve_undo;
size_t len;
char *endptr;
int i;
resolve_undo = xcalloc(1, sizeof(*resolve_undo));
resolve_undo->strdup_strings = 1;
while (size) {
struct string_list_item *lost;
struct resolve_undo_info *ui;
len = strlen(data) + 1;
if (size <= len)
goto error;
string_list: Fix argument order for string_list_insert Update the definition and callers of string_list_insert to use the string_list as the first argument. This helps make the string_list API easier to use by being more consistent. Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-06-26 07:41:35 +08:00
lost = string_list_insert(resolve_undo, data);
resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
if (!lost->util)
lost->util = xcalloc(1, sizeof(*ui));
ui = lost->util;
size -= len;
data += len;
for (i = 0; i < 3; i++) {
ui->mode[i] = strtoul(data, &endptr, 8);
if (!endptr || endptr == data || *endptr)
goto error;
len = (endptr + 1) - (char*)data;
if (size <= len)
goto error;
size -= len;
data += len;
}
for (i = 0; i < 3; i++) {
if (!ui->mode[i])
continue;
if (size < 20)
goto error;
build: make code "-Wpointer-arith" clean Recently introduced resolve_undo_read() expected arithmetic to (void *) to work on byte-addresses. Correct this. Noticed by Brandon Casey. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-02-02 14:04:03 +08:00
hashcpy(ui->sha1[i], (const unsigned char *)data);
resolve-undo: record resolved conflicts in a new index extension section When resolving a conflict using "git add" to create a stage #0 entry, or "git rm" to remove entries at higher stages, remove_index_entry_at() function is eventually called to remove unmerged (i.e. higher stage) entries from the index. Introduce a "resolve_undo_info" structure and keep track of the removed cache entries, and save it in a new index extension section in the index_state. Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and "reset" are signs that recorded information in the index is no longer necessary. The data is removed from the index extension when operations start; they may leave conflicted entries in the index, and later user actions like "git add" will record their conflicted states afresh. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-25 16:30:51 +08:00
size -= 20;
data += 20;
}
}
return resolve_undo;
error:
string_list_clear(resolve_undo, 1);
error("Index records invalid resolve-undo information");
return NULL;
}
void resolve_undo_clear_index(struct index_state *istate)
{
struct string_list *resolve_undo = istate->resolve_undo;
if (!resolve_undo)
return;
string_list_clear(resolve_undo, 1);
free(resolve_undo);
istate->resolve_undo = NULL;
istate->cache_changed = 1;
}
resolve-undo: "checkout -m path" uses resolve-undo information Once you resolved conflicts by "git add path", you cannot recreate the conflicted state with "git checkout -m path", because you lost information from higher stages in the index when you resolved them. Since we record the necessary information in the resolve-undo index extension these days, we can reproduce the unmerged state in the index and check it out. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 03:57:11 +08:00
int unmerge_index_entry_at(struct index_state *istate, int pos)
{
Convert "struct cache_entry *" to "const ..." wherever possible I attempted to make index_state->cache[] a "const struct cache_entry **" to find out how existing entries in index are modified and where. The question I have is what do we do if we really need to keep track of on-disk changes in the index. The result is - diff-lib.c: setting CE_UPTODATE - name-hash.c: setting CE_HASHED - preload-index.c, read-cache.c, unpack-trees.c and builtin/update-index: obvious - entry.c: write_entry() may refresh the checked out entry via fill_stat_cache_info(). This causes "non-const struct cache_entry *" in builtin/apply.c, builtin/checkout-index.c and builtin/checkout.c - builtin/ls-files.c: --with-tree changes stagemask and may set CE_UPDATE Of these, write_entry() and its call sites are probably most interesting because it modifies on-disk info. But this is stat info and can be retrieved via refresh, at least for porcelain commands. Other just uses ce_flags for local purposes. So, keeping track of "dirty" entries is just a matter of setting a flag in index modification functions exposed by read-cache.c. Except unpack-trees, the rest of the code base does not do anything funny behind read-cache's back. The actual patch is less valueable than the summary above. But if anyone wants to re-identify the above sites. Applying this patch, then this: diff --git a/cache.h b/cache.h index 430d021..1692891 100644 --- a/cache.h +++ b/cache.h @@ -267,7 +267,7 @@ static inline unsigned int canon_mode(unsigned int mode) #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) struct index_state { - struct cache_entry **cache; + const struct cache_entry **cache; unsigned int version; unsigned int cache_nr, cache_alloc, cache_changed; struct string_list *resolve_undo; will help quickly identify them without bogus warnings. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-09 23:29:00 +08:00
const struct cache_entry *ce;
resolve-undo: "checkout -m path" uses resolve-undo information Once you resolved conflicts by "git add path", you cannot recreate the conflicted state with "git checkout -m path", because you lost information from higher stages in the index when you resolved them. Since we record the necessary information in the resolve-undo index extension these days, we can reproduce the unmerged state in the index and check it out. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 03:57:11 +08:00
struct string_list_item *item;
struct resolve_undo_info *ru;
checkout: avoid unnecessary match_pathspec calls In checkout_paths() we do this - for all updated items, call match_pathspec - for all items, call match_pathspec (inside unmerge_cache) - for all items, call match_pathspec (for showing "path .. is unmerged) - for updated items, call match_pathspec and update paths That's a lot of duplicate match_pathspec(s) and the function is not exactly cheap to be called so many times, especially on large indexes. This patch makes it call match_pathspec once per updated index entry, save the result in ce_flags and reuse the results in the following loops. The changes in 0a1283b (checkout $tree $path: do not clobber local changes in $path not in $tree - 2011-09-30) limit the affected paths to ones we read from $tree. We do not do anything to other modified entries in this case, so the "for all items" above could be modified to "for all updated items". But.. The command's behavior now is modified slightly: unmerged entries that match $path, but not updated by $tree, are now NOT touched. Although this should be considered a bug fix, not a regression. A new test is added for this change. And while at there, free ps_matched after use. The following command is tested on webkit, 215k entries. The pattern is chosen mainly to make match_pathspec sweat: git checkout -- "*[a-zA-Z]*[a-zA-Z]*[a-zA-Z]*" before after real 0m3.493s 0m2.737s user 0m2.239s 0m1.586s sys 0m1.252s 0m1.151s Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-27 13:58:21 +08:00
int i, err = 0, matched;
resolve-undo: "checkout -m path" uses resolve-undo information Once you resolved conflicts by "git add path", you cannot recreate the conflicted state with "git checkout -m path", because you lost information from higher stages in the index when you resolved them. Since we record the necessary information in the resolve-undo index extension these days, we can reproduce the unmerged state in the index and check it out. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 03:57:11 +08:00
if (!istate->resolve_undo)
return pos;
ce = istate->cache[pos];
if (ce_stage(ce)) {
/* already unmerged */
while ((pos < istate->cache_nr) &&
! strcmp(istate->cache[pos]->name, ce->name))
pos++;
return pos - 1; /* return the last entry processed */
}
string_list: Fix argument order for string_list_lookup Update the definition and callers of string_list_lookup to use the string_list as the first argument. This helps make the string_list API easier to use by being more consistent. Signed-off-by: Julian Phillips <julian@quantumfyre.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-06-26 07:41:37 +08:00
item = string_list_lookup(istate->resolve_undo, ce->name);
resolve-undo: "checkout -m path" uses resolve-undo information Once you resolved conflicts by "git add path", you cannot recreate the conflicted state with "git checkout -m path", because you lost information from higher stages in the index when you resolved them. Since we record the necessary information in the resolve-undo index extension these days, we can reproduce the unmerged state in the index and check it out. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 03:57:11 +08:00
if (!item)
return pos;
ru = item->util;
if (!ru)
return pos;
checkout: avoid unnecessary match_pathspec calls In checkout_paths() we do this - for all updated items, call match_pathspec - for all items, call match_pathspec (inside unmerge_cache) - for all items, call match_pathspec (for showing "path .. is unmerged) - for updated items, call match_pathspec and update paths That's a lot of duplicate match_pathspec(s) and the function is not exactly cheap to be called so many times, especially on large indexes. This patch makes it call match_pathspec once per updated index entry, save the result in ce_flags and reuse the results in the following loops. The changes in 0a1283b (checkout $tree $path: do not clobber local changes in $path not in $tree - 2011-09-30) limit the affected paths to ones we read from $tree. We do not do anything to other modified entries in this case, so the "for all items" above could be modified to "for all updated items". But.. The command's behavior now is modified slightly: unmerged entries that match $path, but not updated by $tree, are now NOT touched. Although this should be considered a bug fix, not a regression. A new test is added for this change. And while at there, free ps_matched after use. The following command is tested on webkit, 215k entries. The pattern is chosen mainly to make match_pathspec sweat: git checkout -- "*[a-zA-Z]*[a-zA-Z]*[a-zA-Z]*" before after real 0m3.493s 0m2.737s user 0m2.239s 0m1.586s sys 0m1.252s 0m1.151s Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-27 13:58:21 +08:00
matched = ce->ce_flags & CE_MATCHED;
resolve-undo: "checkout -m path" uses resolve-undo information Once you resolved conflicts by "git add path", you cannot recreate the conflicted state with "git checkout -m path", because you lost information from higher stages in the index when you resolved them. Since we record the necessary information in the resolve-undo index extension these days, we can reproduce the unmerged state in the index and check it out. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 03:57:11 +08:00
remove_index_entry_at(istate, pos);
for (i = 0; i < 3; i++) {
struct cache_entry *nce;
if (!ru->mode[i])
continue;
nce = make_cache_entry(ru->mode[i], ru->sha1[i],
ce->name, i + 1, 0);
checkout: avoid unnecessary match_pathspec calls In checkout_paths() we do this - for all updated items, call match_pathspec - for all items, call match_pathspec (inside unmerge_cache) - for all items, call match_pathspec (for showing "path .. is unmerged) - for updated items, call match_pathspec and update paths That's a lot of duplicate match_pathspec(s) and the function is not exactly cheap to be called so many times, especially on large indexes. This patch makes it call match_pathspec once per updated index entry, save the result in ce_flags and reuse the results in the following loops. The changes in 0a1283b (checkout $tree $path: do not clobber local changes in $path not in $tree - 2011-09-30) limit the affected paths to ones we read from $tree. We do not do anything to other modified entries in this case, so the "for all items" above could be modified to "for all updated items". But.. The command's behavior now is modified slightly: unmerged entries that match $path, but not updated by $tree, are now NOT touched. Although this should be considered a bug fix, not a regression. A new test is added for this change. And while at there, free ps_matched after use. The following command is tested on webkit, 215k entries. The pattern is chosen mainly to make match_pathspec sweat: git checkout -- "*[a-zA-Z]*[a-zA-Z]*[a-zA-Z]*" before after real 0m3.493s 0m2.737s user 0m2.239s 0m1.586s sys 0m1.252s 0m1.151s Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-27 13:58:21 +08:00
if (matched)
nce->ce_flags |= CE_MATCHED;
resolve-undo: "checkout -m path" uses resolve-undo information Once you resolved conflicts by "git add path", you cannot recreate the conflicted state with "git checkout -m path", because you lost information from higher stages in the index when you resolved them. Since we record the necessary information in the resolve-undo index extension these days, we can reproduce the unmerged state in the index and check it out. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 03:57:11 +08:00
if (add_index_entry(istate, nce, ADD_CACHE_OK_TO_ADD)) {
err = 1;
error("cannot unmerge '%s'", ce->name);
}
}
if (err)
return pos;
free(ru);
item->util = NULL;
return unmerge_index_entry_at(istate, pos);
}
checkout: avoid unnecessary match_pathspec calls In checkout_paths() we do this - for all updated items, call match_pathspec - for all items, call match_pathspec (inside unmerge_cache) - for all items, call match_pathspec (for showing "path .. is unmerged) - for updated items, call match_pathspec and update paths That's a lot of duplicate match_pathspec(s) and the function is not exactly cheap to be called so many times, especially on large indexes. This patch makes it call match_pathspec once per updated index entry, save the result in ce_flags and reuse the results in the following loops. The changes in 0a1283b (checkout $tree $path: do not clobber local changes in $path not in $tree - 2011-09-30) limit the affected paths to ones we read from $tree. We do not do anything to other modified entries in this case, so the "for all items" above could be modified to "for all updated items". But.. The command's behavior now is modified slightly: unmerged entries that match $path, but not updated by $tree, are now NOT touched. Although this should be considered a bug fix, not a regression. A new test is added for this change. And while at there, free ps_matched after use. The following command is tested on webkit, 215k entries. The pattern is chosen mainly to make match_pathspec sweat: git checkout -- "*[a-zA-Z]*[a-zA-Z]*[a-zA-Z]*" before after real 0m3.493s 0m2.737s user 0m2.239s 0m1.586s sys 0m1.252s 0m1.151s Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-27 13:58:21 +08:00
void unmerge_marked_index(struct index_state *istate)
{
int i;
if (!istate->resolve_undo)
return;
for (i = 0; i < istate->cache_nr; i++) {
Convert "struct cache_entry *" to "const ..." wherever possible I attempted to make index_state->cache[] a "const struct cache_entry **" to find out how existing entries in index are modified and where. The question I have is what do we do if we really need to keep track of on-disk changes in the index. The result is - diff-lib.c: setting CE_UPTODATE - name-hash.c: setting CE_HASHED - preload-index.c, read-cache.c, unpack-trees.c and builtin/update-index: obvious - entry.c: write_entry() may refresh the checked out entry via fill_stat_cache_info(). This causes "non-const struct cache_entry *" in builtin/apply.c, builtin/checkout-index.c and builtin/checkout.c - builtin/ls-files.c: --with-tree changes stagemask and may set CE_UPDATE Of these, write_entry() and its call sites are probably most interesting because it modifies on-disk info. But this is stat info and can be retrieved via refresh, at least for porcelain commands. Other just uses ce_flags for local purposes. So, keeping track of "dirty" entries is just a matter of setting a flag in index modification functions exposed by read-cache.c. Except unpack-trees, the rest of the code base does not do anything funny behind read-cache's back. The actual patch is less valueable than the summary above. But if anyone wants to re-identify the above sites. Applying this patch, then this: diff --git a/cache.h b/cache.h index 430d021..1692891 100644 --- a/cache.h +++ b/cache.h @@ -267,7 +267,7 @@ static inline unsigned int canon_mode(unsigned int mode) #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) struct index_state { - struct cache_entry **cache; + const struct cache_entry **cache; unsigned int version; unsigned int cache_nr, cache_alloc, cache_changed; struct string_list *resolve_undo; will help quickly identify them without bogus warnings. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-09 23:29:00 +08:00
const struct cache_entry *ce = istate->cache[i];
checkout: avoid unnecessary match_pathspec calls In checkout_paths() we do this - for all updated items, call match_pathspec - for all items, call match_pathspec (inside unmerge_cache) - for all items, call match_pathspec (for showing "path .. is unmerged) - for updated items, call match_pathspec and update paths That's a lot of duplicate match_pathspec(s) and the function is not exactly cheap to be called so many times, especially on large indexes. This patch makes it call match_pathspec once per updated index entry, save the result in ce_flags and reuse the results in the following loops. The changes in 0a1283b (checkout $tree $path: do not clobber local changes in $path not in $tree - 2011-09-30) limit the affected paths to ones we read from $tree. We do not do anything to other modified entries in this case, so the "for all items" above could be modified to "for all updated items". But.. The command's behavior now is modified slightly: unmerged entries that match $path, but not updated by $tree, are now NOT touched. Although this should be considered a bug fix, not a regression. A new test is added for this change. And while at there, free ps_matched after use. The following command is tested on webkit, 215k entries. The pattern is chosen mainly to make match_pathspec sweat: git checkout -- "*[a-zA-Z]*[a-zA-Z]*[a-zA-Z]*" before after real 0m3.493s 0m2.737s user 0m2.239s 0m1.586s sys 0m1.252s 0m1.151s Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-03-27 13:58:21 +08:00
if (ce->ce_flags & CE_MATCHED)
i = unmerge_index_entry_at(istate, i);
}
}
resolve-undo: "checkout -m path" uses resolve-undo information Once you resolved conflicts by "git add path", you cannot recreate the conflicted state with "git checkout -m path", because you lost information from higher stages in the index when you resolved them. Since we record the necessary information in the resolve-undo index extension these days, we can reproduce the unmerged state in the index and check it out. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 03:57:11 +08:00
void unmerge_index(struct index_state *istate, const char **pathspec)
{
int i;
if (!istate->resolve_undo)
return;
for (i = 0; i < istate->cache_nr; i++) {
Convert "struct cache_entry *" to "const ..." wherever possible I attempted to make index_state->cache[] a "const struct cache_entry **" to find out how existing entries in index are modified and where. The question I have is what do we do if we really need to keep track of on-disk changes in the index. The result is - diff-lib.c: setting CE_UPTODATE - name-hash.c: setting CE_HASHED - preload-index.c, read-cache.c, unpack-trees.c and builtin/update-index: obvious - entry.c: write_entry() may refresh the checked out entry via fill_stat_cache_info(). This causes "non-const struct cache_entry *" in builtin/apply.c, builtin/checkout-index.c and builtin/checkout.c - builtin/ls-files.c: --with-tree changes stagemask and may set CE_UPDATE Of these, write_entry() and its call sites are probably most interesting because it modifies on-disk info. But this is stat info and can be retrieved via refresh, at least for porcelain commands. Other just uses ce_flags for local purposes. So, keeping track of "dirty" entries is just a matter of setting a flag in index modification functions exposed by read-cache.c. Except unpack-trees, the rest of the code base does not do anything funny behind read-cache's back. The actual patch is less valueable than the summary above. But if anyone wants to re-identify the above sites. Applying this patch, then this: diff --git a/cache.h b/cache.h index 430d021..1692891 100644 --- a/cache.h +++ b/cache.h @@ -267,7 +267,7 @@ static inline unsigned int canon_mode(unsigned int mode) #define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) struct index_state { - struct cache_entry **cache; + const struct cache_entry **cache; unsigned int version; unsigned int cache_nr, cache_alloc, cache_changed; struct string_list *resolve_undo; will help quickly identify them without bogus warnings. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-09 23:29:00 +08:00
const struct cache_entry *ce = istate->cache[i];
resolve-undo: "checkout -m path" uses resolve-undo information Once you resolved conflicts by "git add path", you cannot recreate the conflicted state with "git checkout -m path", because you lost information from higher stages in the index when you resolved them. Since we record the necessary information in the resolve-undo index extension these days, we can reproduce the unmerged state in the index and check it out. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2009-12-26 03:57:11 +08:00
if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, NULL))
continue;
i = unmerge_index_entry_at(istate, i);
}
}
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