undef/git-commit-vandalism
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

git-apply: start using the index file information.

Browse Source 
Right now we only use it to figure out what the filename might
be when that is ambiguous, but we'll get there..
This commit is contained in:
Linus Torvalds 2005-05-23 19:13:55 -07:00
parent 4dfdbe10dc
commit 9a4a100eb4
1 changed files with 68 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

87
apply.c
View File

@ -85,7 +85,28 @@ static int is_dev_null(const char *str)
return !memcmp("/dev/null", str, 9) && isspace(str[9]);
}
static char * find_name(const char *line, char *def, int p_value)
#define TERM_EXIST 1
#define TERM_SPACE 2
#define TERM_TAB 4
static int name_terminate(const char *name, int namelen, int c, int terminate)
{
if (c == ' ' && !(terminate & TERM_SPACE))
return 0;
if (c == '\t' && !(terminate & TERM_TAB))
return 0;
/*
* Do we want an existing name? Return false and
* continue if it's not there.
*/
if (terminate & TERM_EXIST)
return cache_name_pos(name, namelen) >= 0;
return 1;
}
static char * find_name(const char *line, char *def, int p_value, int terminate)
{
int len;
const char *start = line;
@ -93,8 +114,13 @@ static char * find_name(const char *line, char *def, int p_value)
for (;;) {
char c = *line;
if (isspace(c))
break;
if (isspace(c)) {
if (c == '\n')
break;
if (name_terminate(start, line-start, c, terminate))
break;
}
line++;
if (c == '/' && !--p_value)
start = line;
@ -128,6 +154,10 @@ static char * find_name(const char *line, char *def, int p_value)
* Get the name etc info from the --/+++ lines of a traditional patch header
*
* NOTE! This hardcodes "-p1" behaviour in filename detection.
*
* FIXME! The end-of-filename heuristics are kind of screwy. For existing
* files, we can happily check the index for a match, but for creating a
* new file we should try to match whatever "patch" does. I have no idea.
*/
static int parse_traditional_patch(const char *first, const char *second)
{
@ -138,18 +168,19 @@ static int parse_traditional_patch(const char *first, const char *second)
second += 4; // skip "+++ "
if (is_dev_null(first)) {
is_new = 1;
name = find_name(second, def_name, p_value);
name = find_name(second, def_name, p_value, TERM_SPACE | TERM_TAB);
new_name = name;
} else if (is_dev_null(second)) {
is_delete = 1;
name = find_name(first, def_name, p_value);
name = find_name(first, def_name, p_value, TERM_EXIST | TERM_SPACE | TERM_TAB);
old_name = name;
} else {
name = find_name(first, def_name, p_value);
name = find_name(second, name, p_value);
name = find_name(first, def_name, p_value, TERM_EXIST | TERM_SPACE | TERM_TAB);
name = find_name(second, name, p_value, TERM_EXIST | TERM_SPACE | TERM_TAB);
old_name = new_name = name;
}
if (!name)
die("unable to find filename in patch at line %d", linenr);
old_name = name;
new_name = name;
}
static int gitdiff_hdrend(const char *line)
@ -159,15 +190,15 @@ static int gitdiff_hdrend(const char *line)
static int gitdiff_oldname(const char *line)
{
if (!old_name)
old_name = find_name(line, NULL, 1);
if (!old_name && !is_new)
old_name = find_name(line, NULL, 1, 0);
return 0;
}
static int gitdiff_newname(const char *line)
{
if (!new_name)
new_name = find_name(line, NULL, 1);
if (!new_name && !is_delete)
new_name = find_name(line, NULL, 1, 0);
return 0;
}
@ -198,28 +229,28 @@ static int gitdiff_newfile(const char *line)
static int gitdiff_copysrc(const char *line)
{
is_copy = 1;
old_name = find_name(line, NULL, 0);
old_name = find_name(line, NULL, 0, 0);
return 0;
}
static int gitdiff_copydst(const char *line)
{
is_copy = 1;
new_name = find_name(line, NULL, 0);
new_name = find_name(line, NULL, 0, 0);
return 0;
}
static int gitdiff_renamesrc(const char *line)
{
is_rename = 1;
old_name = find_name(line, NULL, 0);
old_name = find_name(line, NULL, 0, 0);
return 0;
}
static int gitdiff_renamedst(const char *line)
{
is_rename = 1;
new_name = find_name(line, NULL, 0);
new_name = find_name(line, NULL, 0, 0);
return 0;
}
@ -228,6 +259,15 @@ static int gitdiff_similarity(const char *line)
return 0;
}
/*
* This is normal for a diff that doesn't change anything: we'll fall through
* into the next diff. Tell the parser to break out.
*/
static int gitdiff_unrecognized(const char *line)
{
return -1;
}
/* Verify that we recognize the lines following a git header */
static int parse_git_header(char *line, int len, unsigned int size)
{
@ -257,6 +297,7 @@ static int parse_git_header(char *line, int len, unsigned int size)
{ "rename from ", gitdiff_renamesrc },
{ "rename to ", gitdiff_renamedst },
{ "similarity index ", gitdiff_similarity },
{ "", gitdiff_unrecognized },
};
int i;
@ -270,6 +311,7 @@ static int parse_git_header(char *line, int len, unsigned int size)
continue;
if (p->fn(line + oplen) < 0)
return offset;
break;
}
}
@ -478,8 +520,15 @@ printf("Rename: %d\n", is_rename);
printf("Copy: %d\n", is_copy);
printf("New: %d\n", is_new);
printf("Delete: %d\n", is_delete);
printf("Mode: %o->%o\n", old_mode, new_mode);
printf("Name: '%s'->'%s'\n", old_name, new_name);
printf("Mode: %o:%o\n", old_mode, new_mode);
printf("Name: '%s':'%s'\n", old_name, new_name);
if (old_name && cache_name_pos(old_name, strlen(old_name)) < 0)
die("file %s does not exist", old_name);
if (new_name && (is_new | is_rename | is_copy)) {
if (cache_name_pos(new_name, strlen(new_name)) >= 0)
die("file %s already exists", new_name);
}
patch = header + hdrsize;
patchsize = apply_single_patch(patch, size - offset - hdrsize);