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git/rev-parse.c

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Add 'git-rev-parse' helper script It's an incredibly cheesy helper that changes human-readable revision arguments into the git-rev-list argument format. You can use it to do something like this: git-rev-list --pretty $(git-rev-parse --default HEAD "$@") which is what git-log-script will become. Here git-rev-parse will then allow you to use arguments like "v2.6.12-rc5.." or similar human-readable ranges. It's really quite stupid: "a..b" will be converted into "a" and "^b" if "a" and "b" are valid object pointers. And the "--default" case will be used if nothing but flags have been seen, so that you can default to a certain argument if there are no other ranges.
20 years ago
/*
* rev-parse.c
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
Make rev-parse understand "extended sha1" syntax You can say "HEAD.p" for the "parent of HEAD". It nests, so HEAD.p2.p means parent of second parent of HEAD (which obviously depends on HEAD being a merge).
20 years ago
#include "commit.h"
Add "--all" flag to rev-parse that shows all refs And make git-rev-list just silently ignore non-commit refs if we're not asking for all objects.
20 years ago
#include "refs.h"
Make rev-parse understand "extended sha1" syntax You can say "HEAD.p" for the "parent of HEAD". It nests, so HEAD.p2.p means parent of second parent of HEAD (which obviously depends on HEAD being a merge).
20 years ago
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
static char *def = NULL;
static int no_revs = 0;
static int single_rev = 0;
static int revs_only = 0;
static int do_rev_argument = 1;
static int output_revs = 0;
Add "--flags" and "--no-flags" arguments to git-rev-parse The scripts that use this (notably "git diff") will want to split up flags and file arguments.
20 years ago
static int flags_only = 0;
static int no_flags = 0;
[PATCH] Help scripts that use git-rev-parse to grok args with SP/TAB/LF The git-rev-parse command uses LF to separate each argument it parses, so its users at least need to set IFS to LF to be able to handle filenames with embedded SPs and TABs. Some commands, however, can take and do expect arguments with embedded LF, notably, "-S" (pickaxe) of diff family, so even this workaround does not work for them. When --sq flag to git-rev-parse is given, instead of showing one argument per line, it outputs arguments quoted for consumption with "eval" by the caller, to remedy this situation. As an example, this patch converts git-whatchanged to use this new feature. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
20 years ago
static int output_sq = 0;
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
git-rev-parse: add "--not" flag to mark subsequent heads negative If you have two lists of heads, and you want to see ones reachable from list $a but not from list $b, just do git-rev-list $(git-rev-parse $a --not $b) which is useful for both bisecting (where "b" would be the list of known good revisions, and "a" would be the latest found bad head) and for just seeing what the difference between two sets of heads are if you want to generate a pack-file for the difference.
20 years ago
#define NORMAL 0
#define REVERSED 1
static int show_type = NORMAL;
Teach git-rev-parse about revision-specifying arguments Things like "--max-count=xxx" are "rev-only".
20 years ago
/*
* Some arguments are relevant "revision" arguments,
* others are about output format or other details.
* This sorts it all out.
*/
static int is_rev_argument(const char *arg)
{
static const char *rev_args[] = {
"--max-count=",
"--max-age=",
"--min-age=",
"--merge-order",
NULL
};
const char **p = rev_args;
for (;;) {
const char *str = *p++;
int len;
if (!str)
return 0;
len = strlen(str);
if (!strncmp(arg, str, len))
return 1;
}
}
[PATCH] Help scripts that use git-rev-parse to grok args with SP/TAB/LF The git-rev-parse command uses LF to separate each argument it parses, so its users at least need to set IFS to LF to be able to handle filenames with embedded SPs and TABs. Some commands, however, can take and do expect arguments with embedded LF, notably, "-S" (pickaxe) of diff family, so even this workaround does not work for them. When --sq flag to git-rev-parse is given, instead of showing one argument per line, it outputs arguments quoted for consumption with "eval" by the caller, to remedy this situation. As an example, this patch converts git-whatchanged to use this new feature. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
20 years ago
static void show(const char *arg)
{
if (output_sq) {
int sq = '\'', ch;
putchar(sq);
while ((ch = *arg++)) {
if (ch == sq)
fputs("'\\'", stdout);
putchar(ch);
}
putchar(sq);
putchar(' ');
}
else
puts(arg);
}
Add "--all" flag to rev-parse that shows all refs And make git-rev-list just silently ignore non-commit refs if we're not asking for all objects.
20 years ago
static void show_rev(int type, const unsigned char *sha1)
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
{
if (no_revs)
return;
output_revs++;
[PATCH] Help scripts that use git-rev-parse to grok args with SP/TAB/LF The git-rev-parse command uses LF to separate each argument it parses, so its users at least need to set IFS to LF to be able to handle filenames with embedded SPs and TABs. Some commands, however, can take and do expect arguments with embedded LF, notably, "-S" (pickaxe) of diff family, so even this workaround does not work for them. When --sq flag to git-rev-parse is given, instead of showing one argument per line, it outputs arguments quoted for consumption with "eval" by the caller, to remedy this situation. As an example, this patch converts git-whatchanged to use this new feature. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
20 years ago
/* Hexadecimal string plus possibly a carret;
* this does not have to be quoted even under output_sq.
*/
printf("%s%s%c", type == show_type ? "" : "^", sha1_to_hex(sha1),
output_sq ? ' ' : '\n');
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
}
static void show_rev_arg(char *rev)
{
if (no_revs)
return;
[PATCH] Help scripts that use git-rev-parse to grok args with SP/TAB/LF The git-rev-parse command uses LF to separate each argument it parses, so its users at least need to set IFS to LF to be able to handle filenames with embedded SPs and TABs. Some commands, however, can take and do expect arguments with embedded LF, notably, "-S" (pickaxe) of diff family, so even this workaround does not work for them. When --sq flag to git-rev-parse is given, instead of showing one argument per line, it outputs arguments quoted for consumption with "eval" by the caller, to remedy this situation. As an example, this patch converts git-whatchanged to use this new feature. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
20 years ago
show(rev);
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
}
static void show_norev(char *norev)
{
Add "--flags" and "--no-flags" arguments to git-rev-parse The scripts that use this (notably "git diff") will want to split up flags and file arguments.
20 years ago
if (flags_only)
return;
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
if (revs_only)
return;
[PATCH] Help scripts that use git-rev-parse to grok args with SP/TAB/LF The git-rev-parse command uses LF to separate each argument it parses, so its users at least need to set IFS to LF to be able to handle filenames with embedded SPs and TABs. Some commands, however, can take and do expect arguments with embedded LF, notably, "-S" (pickaxe) of diff family, so even this workaround does not work for them. When --sq flag to git-rev-parse is given, instead of showing one argument per line, it outputs arguments quoted for consumption with "eval" by the caller, to remedy this situation. As an example, this patch converts git-whatchanged to use this new feature. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
20 years ago
show(norev);
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
}
static void show_arg(char *arg)
{
Add "--flags" and "--no-flags" arguments to git-rev-parse The scripts that use this (notably "git diff") will want to split up flags and file arguments.
20 years ago
if (no_flags)
return;
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
if (do_rev_argument && is_rev_argument(arg))
show_rev_arg(arg);
else
show_norev(arg);
}
static void show_default(void)
{
char *s = def;
if (s) {
unsigned char sha1[20];
def = NULL;
Update get_sha1() to grok extended format. Everybody envies rev-parse, who is the only one that can grok the extended sha1 format. Move the get_extended_sha1() out of rev-parse, rename it to get_sha1() and make it available to everybody else. The one I posted earlier to the list had one bug where it did not handle a name that ends with a digit correctly (it incorrectly tried the "Nth parent" path). This commit fixes it. Signed-off-by: Junio C Hamano <junkio@cox.net>
20 years ago
if (!get_sha1(s, sha1)) {
git-rev-parse: add "--not" flag to mark subsequent heads negative If you have two lists of heads, and you want to see ones reachable from list $a but not from list $b, just do git-rev-list $(git-rev-parse $a --not $b) which is useful for both bisecting (where "b" would be the list of known good revisions, and "a" would be the latest found bad head) and for just seeing what the difference between two sets of heads are if you want to generate a pack-file for the difference.
20 years ago
show_rev(NORMAL, sha1);
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
return;
}
show_arg(s);
}
}
Add "--all" flag to rev-parse that shows all refs And make git-rev-list just silently ignore non-commit refs if we're not asking for all objects.
20 years ago
static int show_reference(const char *refname, const unsigned char *sha1)
{
show_rev(NORMAL, sha1);
return 0;
}
Add 'git-rev-parse' helper script It's an incredibly cheesy helper that changes human-readable revision arguments into the git-rev-list argument format. You can use it to do something like this: git-rev-list --pretty $(git-rev-parse --default HEAD "$@") which is what git-log-script will become. Here git-rev-parse will then allow you to use arguments like "v2.6.12-rc5.." or similar human-readable ranges. It's really quite stupid: "a..b" will be converted into "a" and "^b" if "a" and "b" are valid object pointers. And the "--default" case will be used if nothing but flags have been seen, so that you can default to a certain argument if there are no other ranges.
20 years ago
int main(int argc, char **argv)
{
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
int i, as_is = 0;
Add 'git-rev-parse' helper script It's an incredibly cheesy helper that changes human-readable revision arguments into the git-rev-list argument format. You can use it to do something like this: git-rev-list --pretty $(git-rev-parse --default HEAD "$@") which is what git-log-script will become. Here git-rev-parse will then allow you to use arguments like "v2.6.12-rc5.." or similar human-readable ranges. It's really quite stupid: "a..b" will be converted into "a" and "^b" if "a" and "b" are valid object pointers. And the "--default" case will be used if nothing but flags have been seen, so that you can default to a certain argument if there are no other ranges.
20 years ago
unsigned char sha1[20];
for (i = 1; i < argc; i++) {
char *arg = argv[i];
char *dotdot;
if (as_is) {
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
show_norev(arg);
Add 'git-rev-parse' helper script It's an incredibly cheesy helper that changes human-readable revision arguments into the git-rev-list argument format. You can use it to do something like this: git-rev-list --pretty $(git-rev-parse --default HEAD "$@") which is what git-log-script will become. Here git-rev-parse will then allow you to use arguments like "v2.6.12-rc5.." or similar human-readable ranges. It's really quite stupid: "a..b" will be converted into "a" and "^b" if "a" and "b" are valid object pointers. And the "--default" case will be used if nothing but flags have been seen, so that you can default to a certain argument if there are no other ranges.
20 years ago
continue;
}
if (*arg == '-') {
if (!strcmp(arg, "--")) {
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
show_default();
git-rev-parse: split "revs" and "non-revs" Sometimes we only want to output revisions, and sometimes we want to only see the stuff that wasn't revisions. Teach git-rev-parse to understand the "--revs-only" and "--no-revs" flags.
20 years ago
if (revs_only)
break;
Add 'git-rev-parse' helper script It's an incredibly cheesy helper that changes human-readable revision arguments into the git-rev-list argument format. You can use it to do something like this: git-rev-list --pretty $(git-rev-parse --default HEAD "$@") which is what git-log-script will become. Here git-rev-parse will then allow you to use arguments like "v2.6.12-rc5.." or similar human-readable ranges. It's really quite stupid: "a..b" will be converted into "a" and "^b" if "a" and "b" are valid object pointers. And the "--default" case will be used if nothing but flags have been seen, so that you can default to a certain argument if there are no other ranges.
20 years ago
as_is = 1;
}
if (!strcmp(arg, "--default")) {
def = argv[i+1];
i++;
continue;
}
git-rev-parse: split "revs" and "non-revs" Sometimes we only want to output revisions, and sometimes we want to only see the stuff that wasn't revisions. Teach git-rev-parse to understand the "--revs-only" and "--no-revs" flags.
20 years ago
if (!strcmp(arg, "--revs-only")) {
revs_only = 1;
continue;
}
if (!strcmp(arg, "--no-revs")) {
no_revs = 1;
continue;
}
Add "--flags" and "--no-flags" arguments to git-rev-parse The scripts that use this (notably "git diff") will want to split up flags and file arguments.
20 years ago
if (!strcmp(arg, "--flags")) {
flags_only = 1;
continue;
}
if (!strcmp(arg, "--no-flags")) {
no_flags = 1;
continue;
}
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
if (!strcmp(arg, "--verify")) {
revs_only = 1;
do_rev_argument = 0;
single_rev = 1;
continue;
Teach git-rev-parse about revision-specifying arguments Things like "--max-count=xxx" are "rev-only".
20 years ago
}
[PATCH] Help scripts that use git-rev-parse to grok args with SP/TAB/LF The git-rev-parse command uses LF to separate each argument it parses, so its users at least need to set IFS to LF to be able to handle filenames with embedded SPs and TABs. Some commands, however, can take and do expect arguments with embedded LF, notably, "-S" (pickaxe) of diff family, so even this workaround does not work for them. When --sq flag to git-rev-parse is given, instead of showing one argument per line, it outputs arguments quoted for consumption with "eval" by the caller, to remedy this situation. As an example, this patch converts git-whatchanged to use this new feature. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
20 years ago
if (!strcmp(arg, "--sq")) {
output_sq = 1;
continue;
}
git-rev-parse: add "--not" flag to mark subsequent heads negative If you have two lists of heads, and you want to see ones reachable from list $a but not from list $b, just do git-rev-list $(git-rev-parse $a --not $b) which is useful for both bisecting (where "b" would be the list of known good revisions, and "a" would be the latest found bad head) and for just seeing what the difference between two sets of heads are if you want to generate a pack-file for the difference.
20 years ago
if (!strcmp(arg, "--not")) {
show_type ^= REVERSED;
continue;
}
Add "--all" flag to rev-parse that shows all refs And make git-rev-list just silently ignore non-commit refs if we're not asking for all objects.
20 years ago
if (!strcmp(arg, "--all")) {
for_each_ref(show_reference);
continue;
}
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
show_arg(arg);
Add 'git-rev-parse' helper script It's an incredibly cheesy helper that changes human-readable revision arguments into the git-rev-list argument format. You can use it to do something like this: git-rev-list --pretty $(git-rev-parse --default HEAD "$@") which is what git-log-script will become. Here git-rev-parse will then allow you to use arguments like "v2.6.12-rc5.." or similar human-readable ranges. It's really quite stupid: "a..b" will be converted into "a" and "^b" if "a" and "b" are valid object pointers. And the "--default" case will be used if nothing but flags have been seen, so that you can default to a certain argument if there are no other ranges.
20 years ago
continue;
}
dotdot = strstr(arg, "..");
if (dotdot) {
unsigned char end[20];
char *n = dotdot+2;
*dotdot = 0;
Update get_sha1() to grok extended format. Everybody envies rev-parse, who is the only one that can grok the extended sha1 format. Move the get_extended_sha1() out of rev-parse, rename it to get_sha1() and make it available to everybody else. The one I posted earlier to the list had one bug where it did not handle a name that ends with a digit correctly (it incorrectly tried the "Nth parent" path). This commit fixes it. Signed-off-by: Junio C Hamano <junkio@cox.net>
20 years ago
if (!get_sha1(arg, sha1)) {
Add 'git-rev-parse' helper script It's an incredibly cheesy helper that changes human-readable revision arguments into the git-rev-list argument format. You can use it to do something like this: git-rev-list --pretty $(git-rev-parse --default HEAD "$@") which is what git-log-script will become. Here git-rev-parse will then allow you to use arguments like "v2.6.12-rc5.." or similar human-readable ranges. It's really quite stupid: "a..b" will be converted into "a" and "^b" if "a" and "b" are valid object pointers. And the "--default" case will be used if nothing but flags have been seen, so that you can default to a certain argument if there are no other ranges.
20 years ago
if (!*n)
n = "HEAD";
Update get_sha1() to grok extended format. Everybody envies rev-parse, who is the only one that can grok the extended sha1 format. Move the get_extended_sha1() out of rev-parse, rename it to get_sha1() and make it available to everybody else. The one I posted earlier to the list had one bug where it did not handle a name that ends with a digit correctly (it incorrectly tried the "Nth parent" path). This commit fixes it. Signed-off-by: Junio C Hamano <junkio@cox.net>
20 years ago
if (!get_sha1(n, end)) {
git-rev-parse: split "revs" and "non-revs" Sometimes we only want to output revisions, and sometimes we want to only see the stuff that wasn't revisions. Teach git-rev-parse to understand the "--revs-only" and "--no-revs" flags.
20 years ago
if (no_revs)
continue;
def = NULL;
git-rev-parse: add "--not" flag to mark subsequent heads negative If you have two lists of heads, and you want to see ones reachable from list $a but not from list $b, just do git-rev-list $(git-rev-parse $a --not $b) which is useful for both bisecting (where "b" would be the list of known good revisions, and "a" would be the latest found bad head) and for just seeing what the difference between two sets of heads are if you want to generate a pack-file for the difference.
20 years ago
show_rev(NORMAL, end);
show_rev(REVERSED, sha1);
Add 'git-rev-parse' helper script It's an incredibly cheesy helper that changes human-readable revision arguments into the git-rev-list argument format. You can use it to do something like this: git-rev-list --pretty $(git-rev-parse --default HEAD "$@") which is what git-log-script will become. Here git-rev-parse will then allow you to use arguments like "v2.6.12-rc5.." or similar human-readable ranges. It's really quite stupid: "a..b" will be converted into "a" and "^b" if "a" and "b" are valid object pointers. And the "--default" case will be used if nothing but flags have been seen, so that you can default to a certain argument if there are no other ranges.
20 years ago
continue;
}
}
*dotdot = '.';
}
Update get_sha1() to grok extended format. Everybody envies rev-parse, who is the only one that can grok the extended sha1 format. Move the get_extended_sha1() out of rev-parse, rename it to get_sha1() and make it available to everybody else. The one I posted earlier to the list had one bug where it did not handle a name that ends with a digit correctly (it incorrectly tried the "Nth parent" path). This commit fixes it. Signed-off-by: Junio C Hamano <junkio@cox.net>
20 years ago
if (!get_sha1(arg, sha1)) {
git-rev-parse: parse ".." before simple SHA1's This fixes "<hexsha1>..*", since get_sha1() will happily ignore any garbage at the end and thus we never got to the ".." check before.
20 years ago
if (no_revs)
continue;
def = NULL;
git-rev-parse: add "--not" flag to mark subsequent heads negative If you have two lists of heads, and you want to see ones reachable from list $a but not from list $b, just do git-rev-list $(git-rev-parse $a --not $b) which is useful for both bisecting (where "b" would be the list of known good revisions, and "a" would be the latest found bad head) and for just seeing what the difference between two sets of heads are if you want to generate a pack-file for the difference.
20 years ago
show_rev(NORMAL, sha1);
git-rev-parse: parse ".." before simple SHA1's This fixes "<hexsha1>..*", since get_sha1() will happily ignore any garbage at the end and thus we never got to the ".." check before.
20 years ago
continue;
}
Update get_sha1() to grok extended format. Everybody envies rev-parse, who is the only one that can grok the extended sha1 format. Move the get_extended_sha1() out of rev-parse, rename it to get_sha1() and make it available to everybody else. The one I posted earlier to the list had one bug where it did not handle a name that ends with a digit correctly (it incorrectly tried the "Nth parent" path). This commit fixes it. Signed-off-by: Junio C Hamano <junkio@cox.net>
20 years ago
if (*arg == '^' && !get_sha1(arg+1, sha1)) {
git-rev-parse: parse ".." before simple SHA1's This fixes "<hexsha1>..*", since get_sha1() will happily ignore any garbage at the end and thus we never got to the ".." check before.
20 years ago
if (no_revs)
continue;
def = NULL;
git-rev-parse: add "--not" flag to mark subsequent heads negative If you have two lists of heads, and you want to see ones reachable from list $a but not from list $b, just do git-rev-list $(git-rev-parse $a --not $b) which is useful for both bisecting (where "b" would be the list of known good revisions, and "a" would be the latest found bad head) and for just seeing what the difference between two sets of heads are if you want to generate a pack-file for the difference.
20 years ago
show_rev(REVERSED, sha1);
git-rev-parse: parse ".." before simple SHA1's This fixes "<hexsha1>..*", since get_sha1() will happily ignore any garbage at the end and thus we never got to the ".." check before.
20 years ago
continue;
}
git-rev-parse: re-organize and be more careful Output default revisions as their hex SHA1 names to be consistent. Add "--verify" flag that verifies that we output a single ref and not more (and disables ref arguments).
20 years ago
show_default();
show_norev(arg);
}
show_default();
if (single_rev && output_revs != 1) {
fprintf(stderr, "Needed a single revision\n");
exit(1);
Add 'git-rev-parse' helper script It's an incredibly cheesy helper that changes human-readable revision arguments into the git-rev-list argument format. You can use it to do something like this: git-rev-list --pretty $(git-rev-parse --default HEAD "$@") which is what git-log-script will become. Here git-rev-parse will then allow you to use arguments like "v2.6.12-rc5.." or similar human-readable ranges. It's really quite stupid: "a..b" will be converted into "a" and "^b" if "a" and "b" are valid object pointers. And the "--default" case will be used if nothing but flags have been seen, so that you can default to a certain argument if there are no other ranges.
20 years ago
}
return 0;
}