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NodeJsServer/source/node_modules/debug/node.js at master · zsboss/NodeJsServer · GitHub
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NodeJsServer
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debug
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node.js
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/**
* Module dependencies.
*/
var
tty
=
require
(
'tty'
)
;
var
util
=
require
(
'util'
)
;
/**
* This is the Node.js implementation of `debug()`.
*
* Expose `debug()` as the module.
*/
exports
=
module
.
exports
=
require
(
'./debug'
)
;
exports
.
log
=
log
;
exports
.
formatArgs
=
formatArgs
;
exports
.
save
=
save
;
exports
.
load
=
load
;
exports
.
useColors
=
useColors
;
/**
* Colors.
*/
exports
.
colors
=
[
6
,
2
,
3
,
4
,
5
,
1
]
;
/**
* The file descriptor to write the `debug()` calls to.
* Set the `DEBUG_FD` env variable to override with another value. i.e.:
*
* $ DEBUG_FD=3 node script.js 3>debug.log
*/
var
fd
=
parseInt
(
process
.
env
.
DEBUG_FD
,
10
)
||
2
;
var
stream
=
1
===
fd
?
process
.
stdout
:
2
===
fd
?
process
.
stderr
:
createWritableStdioStream
(
fd
)
;
/**
* Is stdout a TTY? Colored output is enabled when `true`.
*/
function
useColors
(
)
{
var
debugColors
=
(
process
.
env
.
DEBUG_COLORS
||
''
)
.
trim
(
)
.
toLowerCase
(
)
;
if
(
0
===
debugColors
.
length
)
{
return
tty
.
isatty
(
fd
)
;
}
else
{
return
'0'
!==
debugColors
&&
'no'
!==
debugColors
&&
'false'
!==
debugColors
&&
'disabled'
!==
debugColors
;
}
}
/**
* Map %o to `util.inspect()`, since Node doesn't do that out of the box.
*/
var
inspect
=
(
4
===
util
.
inspect
.
length
?
// node <= 0.8.x
function
(
v
,
colors
)
{
return
util
.
inspect
(
v
,
void
0
,
void
0
,
colors
)
;
}
:
// node > 0.8.x
function
(
v
,
colors
)
{
return
util
.
inspect
(
v
,
{
colors
:
colors
}
)
;
}
)
;
exports
.
formatters
.
o
=
function
(
v
)
{
return
inspect
(
v
,
this
.
useColors
)
.
replace
(
/
\s
*
\n
\s
*
/
g
,
' '
)
;
}
;
/**
* Adds ANSI color escape codes if enabled.
*
*
@api
public
*/
function
formatArgs
(
)
{
var
args
=
arguments
;
var
useColors
=
this
.
useColors
;
var
name
=
this
.
namespace
;
if
(
useColors
)
{
var
c
=
this
.
color
;
args
[
0
]
=
' \u001b[3'
+
c
+
';1m'
+
name
+
' '
+
'\u001b[0m'
+
args
[
0
]
+
'\u001b[3'
+
c
+
'm'
+
' +'
+
exports
.
humanize
(
this
.
diff
)
+
'\u001b[0m'
;
}
else
{
args
[
0
]
=
new
Date
(
)
.
toUTCString
(
)
+
' '
+
name
+
' '
+
args
[
0
]
;
}
return
args
;
}
/**
* Invokes `console.error()` with the specified arguments.
*/
function
log
(
)
{
return
stream
.
write
(
util
.
format
.
apply
(
this
,
arguments
)
+
'\n'
)
;
}
/**
* Save `namespaces`.
*
*
@param
{
String
} namespaces
*
@api
private
*/
function
save
(
namespaces
)
{
if
(
null
==
namespaces
)
{
// If you set a process.env field to null or undefined, it gets cast to the
// string 'null' or 'undefined'. Just delete instead.
delete
process
.
env
.
DEBUG
;
}
else
{
process
.
env
.
DEBUG
=
namespaces
;
}
}
/**
* Load `namespaces`.
*
*
@return
{
String
} returns the previously persisted debug modes
*
@api
private
*/
function
load
(
)
{
return
process
.
env
.
DEBUG
;
}
/**
* Copied from `node/src/node.js`.
*
* XXX: It's lame that node doesn't expose this API out-of-the-box. It also
* relies on the undocumented `tty_wrap.guessHandleType()` which is also lame.
*/
function
createWritableStdioStream
(
fd
)
{
var
stream
;
var
tty_wrap
=
process
.
binding
(
'tty_wrap'
)
;
// Note stream._type is used for test-module-load-list.js
switch
(
tty_wrap
.
guessHandleType
(
fd
)
)
{
case
'TTY'
:
stream
=
new
tty
.
WriteStream
(
fd
)
;
stream
.
_type
=
'tty'
;
// Hack to have stream not keep the event loop alive.
// See https://github.com/joyent/node/issues/1726
if
(
stream
.
_handle
&&
stream
.
_handle
.
unref
)
{
stream
.
_handle
.
unref
(
)
;
}
break
;
case
'FILE'
:
var
fs
=
require
(
'fs'
)
;
stream
=
new
fs
.
SyncWriteStream
(
fd
,
{
autoClose
:
false
}
)
;
stream
.
_type
=
'fs'
;
break
;
case
'PIPE'
:
case
'TCP'
:
var
net
=
require
(
'net'
)
;
stream
=
new
net
.
Socket
(
{
fd
:
fd
,
readable
:
false
,
writable
:
true
}
)
;
// FIXME Should probably have an option in net.Socket to create a
// stream from an existing fd which is writable only. But for now
// we'll just add this hack and set the `readable` member to false.
// Test: ./node test/fixtures/echo.js < /etc/passwd
stream
.
readable
=
false
;
stream
.
read
=
null
;
stream
.
_type
=
'pipe'
;
// FIXME Hack to have stream not keep the event loop alive.
// See https://github.com/joyent/node/issues/1726
if
(
stream
.
_handle
&&
stream
.
_handle
.
unref
)
{
stream
.
_handle
.
unref
(
)
;
}
break
;
default
:
// Probably an error on in uv_guess_handle()
throw
new
Error
(
'Implement me. Unknown stream file type!'
)
;
}
// For supporting legacy API we put the FD here.
stream
.
fd
=
fd
;
stream
.
_isStdio
=
true
;
return
stream
;
}
/**
* Enable namespaces listed in `process.env.DEBUG` initially.
*/
exports
.
enable
(
load
(
)
)
;
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