Fixes some code comments.

This commit is contained in:
Jim Teeuwen 2013-11-01 10:27:50 +01:00
parent a36b3d3839
commit f5e037a829

122
config.go
View File

@ -31,74 +31,68 @@ type Config struct {
// working directory.
Output string
/*
Prefix defines a path prefix which should be stripped from all
file names when generating the keys in the table of contents.
For example, running without the `-prefix` flag, we get:
$ go-bindata /path/to/templates
go_bindata["/path/to/templates/foo.html"] = _path_to_templates_foo_html
Running with the `-prefix` flag, we get:
$ go-bindata -prefix "/path/to/" /path/to/templates/foo.html
go_bindata["templates/foo.html"] = templates_foo_html
*/
// Prefix defines a path prefix which should be stripped from all
// file names when generating the keys in the table of contents.
// For example, running without the `-prefix` flag, we get:
//
// $ go-bindata /path/to/templates
// go_bindata["/path/to/templates/foo.html"] = _path_to_templates_foo_html
//
// Running with the `-prefix` flag, we get:
//
// $ go-bindata -prefix "/path/to/" /path/to/templates/foo.html
// go_bindata["templates/foo.html"] = templates_foo_html
Prefix string
/*
NoMemCopy will alter the way the output file is generated.
It will employ a hack that allows us to read the file data directly from
the compiled program's `.rodata` section. This ensures that when we call
call our generated function, we omit unnecessary mem copies.
The downside of this, is that it requires dependencies on the `reflect` and
`unsafe` packages. These may be restricted on platforms like AppEngine and
thus prevent you from using this mode.
Another disadvantage is that the byte slice we create, is strictly read-only.
For most use-cases this is not a problem, but if you ever try to alter the
returned byte slice, a runtime panic is thrown. Use this mode only on target
platforms where memory constraints are an issue.
The default behaviour is to use the old code generation method. This
prevents the two previously mentioned issues, but will employ at least one
extra memcopy and thus increase memory requirements.
For instance, consider the following two examples:
This would be the default mode, using an extra memcopy but gives a safe
implementation without dependencies on `reflect` and `unsafe`:
func myfile() []byte {
return []byte{0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a}
}
Here is the same functionality, but uses the `.rodata` hack.
The byte slice returned from this example can not be written to without
generating a runtime error.
var _myfile = "\x89\x50\x4e\x47\x0d\x0a\x1a"
func myfile() []byte {
var empty [0]byte
sx := (*reflect.StringHeader)(unsafe.Pointer(&_myfile))
b := empty[:]
bx := (*reflect.SliceHeader)(unsafe.Pointer(&b))
bx.Data = sx.Data
bx.Len = len(_myfile)
bx.Cap = bx.Len
return b
}
*/
// NoMemCopy will alter the way the output file is generated.
//
// It will employ a hack that allows us to read the file data directly from
// the compiled program's `.rodata` section. This ensures that when we call
// call our generated function, we omit unnecessary mem copies.
//
// The downside of this, is that it requires dependencies on the `reflect` and
// `unsafe` packages. These may be restricted on platforms like AppEngine and
// thus prevent you from using this mode.
//
// Another disadvantage is that the byte slice we create, is strictly read-only.
// For most use-cases this is not a problem, but if you ever try to alter the
// returned byte slice, a runtime panic is thrown. Use this mode only on target
// platforms where memory constraints are an issue.
//
// The default behaviour is to use the old code generation method. This
// prevents the two previously mentioned issues, but will employ at least one
// extra memcopy and thus increase memory requirements.
//
// For instance, consider the following two examples:
//
// This would be the default mode, using an extra memcopy but gives a safe
// implementation without dependencies on `reflect` and `unsafe`:
//
// func myfile() []byte {
// return []byte{0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a}
// }
//
// Here is the same functionality, but uses the `.rodata` hack.
// The byte slice returned from this example can not be written to without
// generating a runtime error.
//
// var _myfile = "\x89\x50\x4e\x47\x0d\x0a\x1a"
//
// func myfile() []byte {
// var empty [0]byte
// sx := (*reflect.StringHeader)(unsafe.Pointer(&_myfile))
// b := empty[:]
// bx := (*reflect.SliceHeader)(unsafe.Pointer(&b))
// bx.Data = sx.Data
// bx.Len = len(_myfile)
// bx.Cap = bx.Len
// return b
// }
NoMemCopy bool
/*
NoCompress means the assets are /not/ GZIP compressed before being turned
into Go code. The generated function will automatically unzip
the file data when called. Defaults to true.
*/
// NoCompress means the assets are /not/ GZIP compressed before being turned
// into Go code. The generated function will automatically unzip
// the file data when called. Defaults to false.
NoCompress bool
// Perform a debug build. This generates an asset file, which