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DiffusionGitBranch.php
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<?php
final
class
DiffusionGitBranch
extends
Phobject
{
const
DEFAULT_GIT_REMOTE
=
'origin'
;
/**
* Parse the output of 'git branch -r --verbose --no-abbrev' or similar into
* a map. For instance:
*
* array(
* 'origin/master' => '99a9c082f9a1b68c7264e26b9e552484a5ae5f25',
* );
*
* If you specify $only_this_remote, branches will be filtered to only those
* on the given remote, **and the remote name will be stripped**. For example:
*
* array(
* 'master' => '99a9c082f9a1b68c7264e26b9e552484a5ae5f25',
* );
*
* @param string $stdout stdout of git branch command.
* @param string $only_this_remote (optional) Filter branches to those on a
* specific remote.
* @return map Map of 'branch' or 'remote/branch' to hash at HEAD.
*/
public
static
function
parseRemoteBranchOutput
(
$stdout
,
$only_this_remote
=
null
)
{
$map
=
array
(
)
;
$lines
=
array_filter
(
explode
(
"\n"
,
$stdout
)
)
;
foreach
(
$lines
as
$line
)
{
$matches
=
null
;
if
(
preg_match
(
'/^ (\S+)\s+-> (\S+)$/'
,
$line
,
$matches
)
)
{
// This is a line like:
//
// origin/HEAD -> origin/master
//
// ...which we don't currently do anything interesting with, although
// in theory we could use it to automatically choose the default
// branch.
continue
;
}
if
(
!
preg_match
(
'/^ *(\S+)\s+([a-z0-9]{40})/'
,
$line
,
$matches
)
)
{
throw
new
Exception
(
pht
(
'Failed to parse %s!'
,
$line
)
)
;
}
$remote_branch
=
$matches
[
1
]
;
$branch_head
=
$matches
[
2
]
;
if
(
strpos
(
$remote_branch
,
'HEAD'
)
!==
false
)
{
// let's assume that no one will call their remote or branch HEAD
continue
;
}
if
(
$only_this_remote
)
{
$matches
=
null
;
if
(
!
preg_match
(
'#^([^/]+)/(.*)$#'
,
$remote_branch
,
$matches
)
)
{
throw
new
Exception
(
pht
(
"Failed to parse remote branch '%s'!"
,
$remote_branch
)
)
;
}
$remote_name
=
$matches
[
1
]
;
$branch_name
=
$matches
[
2
]
;
if
(
$remote_name
!=
$only_this_remote
)
{
continue
;
}
$map
[
$branch_name
]
=
$branch_head
;
}
else
{
$map
[
$remote_branch
]
=
$branch_head
;
}
}
return
$map
;
}
/**
* As above, but with no `-r`. Used for bare repositories.
*/
public
static
function
parseLocalBranchOutput
(
$stdout
)
{
$map
=
array
(
)
;
$lines
=
array_filter
(
explode
(
"\n"
,
$stdout
)
)
;
$regex
=
'/^[* ]*(\(no branch\)|\S+)\s+([a-z0-9]{40})/'
;
foreach
(
$lines
as
$line
)
{
$matches
=
null
;
if
(
!
preg_match
(
$regex
,
$line
,
$matches
)
)
{
throw
new
Exception
(
pht
(
'Failed to parse %s!'
,
$line
)
)
;
}
$branch
=
$matches
[
1
]
;
$branch_head
=
$matches
[
2
]
;
if
(
$branch
==
'(no branch)'
)
{
continue
;
}
$map
[
$branch
]
=
$branch_head
;
}
return
$map
;
}
}
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