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<!-- Weekly Snapshot History -->
<p>This page summarizes the changes between tagged weekly snapshots of Go.
For full details, see the <a href="http://code.google.com/p/go/source/list">Mercurial change log</a>.</p>
<p>Weekly snapshots occur often and may not be stable.
If stability of API and code is more important than having the
latest features, use the <a href="release.html">official releases</a> instead.</p>
<p>To update to a specific snapshot, use:</p>
<pre>
hg pull
hg update weekly.<i>YYYY-MM-DD</i>
</pre>
<h2 id="2011-12-02">2011-12-02</h2>
<pre>
This weekly snapshot includes changes to the hash package and a gofix for the
time and os.FileInfo changes in the last snapshot.
The hash.Hasher's Sum method has been given a []byte argument, permitting
the user to hash an arbitrary byte slice without Writing to the Hasher.
Existing code that uses Sum can pass nil as the argument.
Gofix will make this change automatically.
Other changes:
* crypto/tls: cleanup certificate load on windows (thanks Alex Brainman).
* exp/ssh: add Std{in,out,err}Pipe methods to Session (thanks Dave Cheney).
* dashboard: don't choke on weird builder names.
* exp/ssh: export type signal, now Signal (thanks Gustav Paul).
* os: add ModeType constant to mask file type bits (thanks Gustavo Niemeyer).
* text/template: replace Add with AddParseTree.
* go/doc: detect headings and format them in html (thanks Volker Dobler).
</pre>
<h2 id="2011-12-01">2011-12-01</h2>
<pre>
This weekly snapshot includes changes to the time, os, and text/template
packages. The changes to the time and os packages are significant and related.
Code that uses package time, package text/template, or package os's FileInfo
type will require changes.
In package time, there is now one type - time.Time - to represent times.
Note that time.Time should be used as a value, in contrast to old code
which typically used a *time.Time, a pointer to a large struct. (Drop the *.)
Any function that previously accepted a *time.Time, an int64
number of seconds since 1970, or an int64 number of nanoseconds
since 1970 should now accept a time.Time. Especially as a replacement
for the int64s, the type is good documentation about the meaning of
its value.
Whether you were previously calling time.Seconds, time.Nanoseconds,
time.LocalTime, or time.UTC, the replacement is the new function
time.Now.
If you previously wrote code like:
t0 := time.Nanoseconds()
myFunction()
t1 := time.Nanoseconds()
delta := t1 - t0
fmt.Printf("That took %.2f seconds\n", float64(t1-t0)/1e9)
you can now write:
t0 := time.Now()
myFunction()
t1 := time.Now()
delta := t1.Sub(t0)
fmt.Printf("That took %s\n", delta)
In this snippet, the variable delta is of the new type time.Duration, the
replacement for the many int64 parameters that were nanosecond
counts (but not since 1970).
Gofix can do the above conversions and some others, but it does not
rewrite explicit int64 types as time.Time. It is very likely that you will
need to edit your program to change these types after running gofix.
As always, be sure to read the changes that gofix makes using your
version control system's diff feature.
See http://weekly.golang.org/pkg/time/ for details.
In package os, the FileInfo struct is replaced by a FileInfo interface,
admitting implementations by code beyond the operating system.
Code that refers to *os.FileInfo (a pointer to the old struct) should
instead refer to os.FileInfo (the new interface).
The interface has just a few methods:
type FileInfo interface {
Name() string // base name of the file
Size() int64 // length in bytes
Mode() FileMode // file mode bits
ModTime() time.Time // modification time
IsDir() bool // abbreviation for Mode().IsDir()
}
If you need access to the underlying stat_t provided by the operating
system kernel, you can access it by assuming that the FileInfo you are
holding is actually an *os.FileStat, and that it's Sys field is actually a
*syscall.Stat_t, as in:
dev := fi.(*os.FileStat).Sys.(*syscall.Stat_t).Dev
Of course, this is not necessarily portable across different operating
systems.
Gofix will take care of rewriting *os.FileInfo to os.FileInfo for you,
and it will also rewrite expressions like fi.Name into calls like fi.Name().
See http://weekly.golang.org/pkg/os/#FileInfo for details.
The template package has been changed to export a new, simpler API.
The Set type is gone. Instead, templates are automatically associated by
being parsed together; nested definitions implicitly create associations.
Only associated templates can invoke one another.
This approach dramatically reduces the breadth of the construction API.
The html/template package has been updated also.
There's a gofix for the simplest and most common uses of the old API.
Code that doesn't mention the Set type is likely to work after running gofix;
code that uses Set will need to be updated by hand.
The template definition language itself is unchanged.
See http://weekly.golang.org/pkg/text/template/ for details.
Other changes:
* cgo: add support for callbacks from dynamic libraries.
* codereview: gofmt check for non-src/ files (thanks David Crawshaw).
* crypto/openpgp/packet: fix private key checksum.
* crypto/tls: add openbsd root certificate location,
don't rely on map iteration order.
* crypto/x509, crypto/tls: support PKCS#8 private keys.
* dashboard: start of reimplementation in Go for App Engine.
* encoding/xml: fix copy bug.
* exp/gui: move exp/gui and exp/gui/x11 to http://code.google.com/p/x-go-binding
* exp/ssh: various improvements (thanks Dave Cheney and Gustav Paul).
* filepath/path: fix Rel buffer sizing (thanks Gustavo Niemeyer).
* gc: fix Nconv bug (thanks Rémy Oudompheng) and other fixes.
* go/printer, gofmt: performance improvements.
* gofix: test and fix missorted renames.
* goinstall: add -fix flag to run gofix on packages on build failure,
better error reporting,
don't hit network unless a checkout or update is required,
support Google Code sub-repositories.
* html: parser improvements (thanks Andrew Balholm).
* http: fix sniffing bug causing short writes.
* json: speed up encoding, caching reflect calls.
* ld: align ELF data sections.
* math/big: fix destination leak into result value (thanks Roger Peppe),
use recursive subdivision for significant speedup.
* math: faster Cbrt and Sincos (thanks Charles L. Dorian).
* misc/osx: scripts to make OS X package and disk image (thanks Scott Lawrence).
* os: fail if Open("") is called on windows (thanks Alex Brainman).
* runtime: make sure stack is 16-byte aligned on syscall (thanks Alex Brainman).
* spec, gc: allow direct conversion between string and named []byte, []rune.
* sql: add Tx.Stmt to use an existing prepared stmt in a transaction,
more driver docs & tests; no functional changes.
* strings: add ContainsAny and ContainsRune (thanks Scott Lawrence).
* syscall: add SUSv3 RLIMIT/RUSAGE constants (thanks Sébastien Paolacci),
fix openbsd sysctl hostname/domainname workaround,
implement Syscall15 (thanks Alex Brainman).
* time: fix Timer stop.
</pre>
<h2 id="2011-11-18">2011-11-18</h2>
<pre>
This release includes some language changes.
Map and function value comparisons are now disallowed (except for comparison
with nil) as per the Go 1 plan. Function equality was problematic in some
contexts and map equality compares pointers, not the maps' content.
As an experiment, structs are now allowed to be copied even if they contain
unexported fields. This gives packages the ability to return opaque values in
their APIs.
Other changes:
* 6a, 8a: allow $(-1) for consistency with $1, $(1), $-1.
* 6l: code generation fixes (thanks Michał Derkacz).
* build: fix check for selinux allow_execstack on Fedora (thanks Bobby Powers).
* builtin: document delete.
* cgo: don't panic on undeclared enums/structs (thanks Rémy Oudompheng),
fix g0 stack guard.
* crypto/tls: fix handshake message test.
* crypto: update incorrect references to Cipher interface; should be Block.
* doc: clean ups, additions, and fixes to several documents.
* doc/install: add openbsd (thanks Joel Sing!).
* doc: link to Chinese translation of A Tour of Go.
* encoding/json: add marshal/unmarshal benchmark,
decode [] as empty slice, not nil slice,
make BenchmarkSkipValue more consistent.
* env.bash: check for presence of make/gmake (thanks Scott Lawrence).
* exp/sql: NumInput() allow -1 to ignore checking (thanks Yasuhiro Matsumoto),
add DB.Close, fix bugs, remove Execer on Driver (only Conn),
document that for drivers, io.EOF means no more rows,
add client side support for publickey auth (thanks Dave Cheney),
add direct-tcpip client support (thanks Dave Cheney),
change test listen address, also exit test if fails,
other fixes and improvements (thanks Dave Cheney).
* exp/terminal: rename shell to terminal and add SetSize.
* fcgi: fix server capability discovery.
* fmt: distinguish empty vs nil slice/map in %#v.
* gc: better error, type checks, and many fixes,
remove m[k] = x, false syntax (use delete(m, k) instead),
support for building with Plan 9 yacc (thanks Anthony Martin).
* go/printer: make //line formatting idempotent.
* godefs: delete, replaced by cgo -godefs.
* godoc: document -templates flag, fix remote search,
provide mode for flat (non-indented) directory listings.
* gofmt: leave nil nodes of the AST unchanged (thanks Rémy Oudompheng).
* html/template: indirect top-level values before printing.
* html: more parser improvements (thanks Andrew Balholm).
* http: fix serving from CWD with http.ServeFile,
make Dir("") equivalent to Dir(".").
* ld: fix .bss for ldpe (thanks Wei Guangjing).
* math/big: replace nat{} -> nat(nil).
* math: faster Lgamma (thanks Charles L. Dorian).
* mime: implement TypeByExtension for windows.
* misc/bbedit: error and rune support (thanks Anthony Starks).
* misc/benchcmp: benchmark comparison script.
* misc/emacs: add delete builtin (thanks Bobby Powers).
* misc/kate: add error and rune (thanks Evan Shaw).
* misc/notepadplus: error and rune support (thanks Anthony Starks).
* misc/windows: Windows installer in MSI format (thanks Joe Poirier).
* net, io/ioutil: remove use of os.Time (thanks Anthony Martin).
* net/http: fix EOF handling on response body (thanks Gustavo Niemeyer),
fix sniffing when using ReadFrom,
use t.Errorf from alternate goroutine in test.
* os: remove undocumented Envs (use os.Environ instead).
* reflect: empty slice/map is not DeepEqual to nil,
make Value an opaque struct.
* runtime, syscall: convert from godefs to cgo.
* runtime: add nanotime for Plan 9 (thanks Anthony Martin),
add timer support, use for package time,
avoid allocation for make([]T, 0).
* strconv: add Ftoa benchmarks, make Ftoa faster.
* syscall: delete syscall.Sleep, take over env implementation, use error.
* testing: add file:line stamps to messages, print results to standard output.
* text/template: refactor set parsing.
* time: add ISOWeek method to Time (thanks Volker Dobler).
* various: avoid func compare, reduce overuse of os.EINVAL + others.
</pre>
<h2 id="2011-11-09">2011-11-09</h2>
<pre>
This weekly snapshot renames various Go packages as described in the Go 1 plan.
Import statements in client code can be updated automatically with gofix.
The changes are:
asn1 -> encoding/asn1
big -> math/big
cmath -> math/cmplx
csv -> encoding/csv
exec -> os/exec
exp/template/html -> html/template
gob -> encoding/gob
http -> net/http
http/cgi -> net/http/cgi
http/fcgi -> net/http/fcgi
http/httptest -> net/http/httptest
http/pprof -> net/http/pprof
json -> encoding/json
mail -> net/mail
rpc -> net/rpc
rpc/jsonrpc -> net/rpc/jsonrpc
scanner -> text/scanner
smtp -> net/smtp
syslog -> log/syslog
tabwriter -> text/tabwriter
template -> text/template
template/parse -> text/template/parse
rand -> math/rand
url -> net/url
utf16 -> unicode/utf16
utf8 -> unicode/utf8
xml -> encoding/xml
</pre>
<h2 id="2011-11-08">2011-11-08</h2>
<pre>
This weekly snapshot includes some package changes.
In preparation for the Go 1 package reorganziation the sources for various
packages have been moved, but the import paths remain unchanged. This
inconsistency breaks goinstall at this snapshot. If you use goinstall, please
stay synced to the previous weekly snapshot until the next one is tagged.
The Error methods in the html, bzip2, and sql packages that return error values
have been renamed to Err.
Some non-core parts of the http package have been moved to net/http/httputil.
The Dump* and NewChunked* functions and ClientConn, ServerConn, and
ReverseProxy types have been moved from http to httputil.
The API for html/template is now a direct copy of the template API, instead of
exposing a single Escape function. For HTML templates, simply use the
html/template package as you would the template package.
Other changes:
* all: rename os.EOF to io.EOF in non-code contexts (thanks Vincent Vanackere),
sort imports with gofix.
* archive/zip: close file opened with OpenReader (thanks Dmitry Chestnykh).
* bufio: return nil line from ReadLine on error, as documented.
* builtin: document basic types and the built-in error type.
* bytes: add Contains function.
* exp/sql: finish implementation of transactions, flesh out types, docs.
* exp/ssh: improved client authentication support (thanks Dave Cheney).
* gc: better error message for range over non-receive channel,
bug fixes and clean-ups,
detect type switch variable not used cases,
fix escaping of package paths in symbol names,
helpful error message on method call on pointer to pointer,
portably read archive headers (thanks Ron Minnich).
* gob: fix bug when registering the same type multiple times.
* gofix: avoid panic on body-less functions in netudpgroup,
make fix order implicit by date.
* gofmt, gofix: sort imports.
* goinstall: support launchpad.net/~user branches (thanks Jani Monoses).
* gopack: do not look for Go metadata in non-Go objects.
* gotest: don't run examples that have no expected output.
* html: the parser bug fixing campaign continues (thanks Andrew Balholm).
* http: fix whitespace handling in sniffer,
only recognize application/x-www-form-urlencoded in ParseForm,
support Trailers in ReadRequest.
* lib9: add ctime.
* math: faster Gamma (thanks Charles L. Dorian),
improved accuracy for Tan (thanks Charles L. Dorian),
improved high-angle test for Cos, Sin and Tan (thanks Charles L. Dorian).
* net: implement LookupTXT for windows (thanks Alex Brainman).
* os,text,unicode: renamings.
* runtime/cgo: fix data declaration to be extern.
* runtime: add timespec definition for freebsd,
add windows callback tests (thanks Alex Brainman),
fix prototype for openbsd thrsleep,
fix set and not used,
unify mutex code across OSes,
windows_386 sighandler to use correct g (thanks Alex Brainman).
* template: format error with pointer receiver,
make redefinition of a template in a set more consistent.
* test: clear execute bit from source file (thanks Mikio Hara),
make closedchan.go exit with failure if something fails.
* time: faster Nanoseconds call.
* websocket: return an error HTTP response for bad websocket request.
* xml: allow parsing of <_> </_>. (thanks David Crawshaw).
</pre>
<h2 id="2011-11-02">2011-11-02 (new error type)</h2>
<pre>
This snapshot introduces the built-in error type, defined as
type error interface {
Error() string
}
The error type replaces os.Error. Notice that the method name has changed from
String to Error. Package fmt's Print formats both Stringers and errors:
in general there is no need to implement both String and Error methods.
Gofix can update most code. If you have split your package across many files,
it may help to use the -force=error command-line option, which forces gofix to
apply the error fix even if it is not obvious that a particular file needs it.
As always, it is a good idea to read and test the changes that gofix made
before committing them to your version control system.
</pre>
<h2 id="2011-11-01">2011-11-01</h2>
<pre>
* 6l: remove mention of -e flag - it does nothing.
* cc: change cas to newcase (thanks Ron Minnich).
* crypto/openpgp/error: use Error in names of error impl types.
* crypto/rsa: change public exponent from 3 to 65537.
* crypto/tls: add Error method to alert.
* doc: add link to A Tour of Go in Japanese,
add 'all' make rule to build all docs,
refer to tour.golang.org instead of go-tour.appspot.com.
* exp/norm: fixed bug that crept in with moving to the new regexp.
* exp/ssh: fix length header leaking into channel data (thanks Dave Cheney).
* fmt: handle os.Error values explicity (as distinct from Stringer).
* gc: clean up printing,
fix [568]g -V crash (thanks Mikio Hara),
test + fix escape analysis bug.
* go/build: avoid os.Error in tests.
* go/doc: remove os.NewError anti-heuristic.
* go/parser: test and fix := scoping bug.
* gob: split uses of gobError, remove unnecessary embedding.
* gofix: test import insertion, deletion.
* goinstall: intelligent vcs selection for common sites (thanks Julian Phillips).
* gopack: change archive file name length back to 16.
* html: fix print argument in test,
more parser improvements (thanks Andrew Balholm).
* json: properly handle nil slices (thanks Alexander Reece).
* math: improved accuracy for Sin and Cos (thanks Charles L. Dorian).
* misc/emacs: fix restoration of windows after gofmt (thanks Jan Newmarch).
* misc/vim: add rune keyword (thanks Jongmin Kim).
* misc/windows: can be used for amd64 (thanks Alex Brainman).
* net: document why we do not use SO_REUSEADDR on windows (thanks Alex Brainman).
* os: do not interpret 0-length read as EOF.
* pkg: remove .String() from some print arguments.
* rpc: avoid infinite loop on input error.
* runtime/pprof: document OS X being broken.
* runtime: lock the main goroutine to the main OS thread during init.
* spec: define that initialization is sequential.
* strconv: use better errors than os.EINVAL, os.ERANGE.
* syscall: fix Await msg on Plan 9 (thanks Andrey Mirtchovski).
* template: do not use error as stringer,
fix error checking on execute without parse (thanks Scott Lawrence).
* test/alias.go: additional tests.
* test: error-related fixes.
* textproto: prevent long lines in HTTP headers from causing HTTP 400 responses.
* time: add RFC1123 with numeric timezone format (thanks Scott Lawrence).
</pre>
<h2 id="2011-10-26">2011-10-26 (new rune type)</h2>
<pre>
This snapshot introduces the rune type, an alias for int that
should be used for Unicode code points.
A future release of Go (after Go 1) will change rune to be an
alias for int32 instead of int. Using rune consistently is the way
to make your code build both before and after this change.
To test your code for rune safety, you can rebuild the Go tree with
GOEXPERIMENT=rune32 ./all.bash
which builds a compiler in which rune is an alias for int32 instead of int.
Also, run govet on your code to identify methods that might need to have their
signatures updated.
</pre>
<h2 id="2011-10-25">2011-10-25</h2>
<pre>
* big: make SetString return nil if an error occurs,
new Rat.Inv method,
usable zero Rat values without need for explicit initialization.
* codereview: show LGTMs in hg p.
* crypto/x509: fix names in certificate generation.
* exp/ssh: add experimental ssh client,
introduce Session to replace Cmd for interactive commands,
server cleanups (thanks Dave Cheney).
* exp/types: fix crash in parseBasicType on unknown type.
* fmt: don't panic formatting nil interfaces (thanks Gustavo Niemeyer).
* go/ast, go/token: actually run tests; fix go/ast test.
* gotest: explicit -help flag, use $GCFLAGS like make does.
* govet: check canonical dynamic method signatures.
* html: improved parsing (thanks Andrew Balholm),
parse <select> tags, parse and render comment nodes,
remove the Tokenizer.ReturnComments option.
* http: Transport: with TLS InsecureSkipVerify, skip hostname check.
* misc/vim: add highlighting for delete (thanks Dave Cheney).
* net: do not set SO_REUSEADDR for windows (thanks Alex Brainman).
* os/inotify: move to exp/inotify (thanks Mikio Hara).
* runtime: include bootstrap m in mcpu accounting (thanks Hector Chu).
* syscall: use uintptr for Mount flags.
</pre>
<h2 id="2011-10-18">2011-10-18</h2>
<pre>
This weekly snapshot includes some language and package changes that may
require code changes. Please read these notes carefully, as there are many
changes and your code will likely be affected.
The syntax for map deletion has been changed. Code that looks like:
m[x] = 0, false
should be written as:
delete(m, x)
The compiler still accepts m[x] = 0, false for now; even so, you can use gofix
to rewrite such assignments into delete(m, x).
The Go compiler will reject a return statement without arguments when any of
the result variables has been shadowed. Code rejected as a result of this
change is likely to be buggy.
Receive-only channels (<-chan T) cannot be closed.
The compiler will diagnose such attempts.
The first element of a map iteration is chosen at random. Code that depends on
iteration order will need to be updated.
Goroutines may be run during program initialization.
A string may be appended to a byte slice. This code is now legal:
var b []byte
var s string
b = append(b, s...)
The gotry command and its associated try package have been deleted.
It was a fun experiment that - in the end - didn't carry its weight.
The gotype tool has been moved to exp/gotype and its associated go/types
package has been moved to exp/types. The deprecated go/typechecker package has
been deleted.
The enbflint tool has been moved to pkg/exp/ebnflint and its associated ebnf
package has been moved to pkg/exp/ebnf.
The netchan package has been moved to old/netchan.
The http/spdy package has been moved to exp/spdy.
The exp/datafmt package has been deleted.
The container/vector package has been deleted. Slices are better:
http://code.google.com/p/go-wiki/wiki/SliceTricks
Other changes:
* 5l/6l/8l: correct ELFRESERVE diagnostic (thanks Anthony Martin).
* 6l/8l: support OS X code signing (thanks Mikkel Krautz).
* asn1: accept UTF8 strings as ASN.1 ANY values.
* big: handle aliasing correctly for Rat.SetFrac.
* build: add missing nuke target (thanks Anthony Martin),
catch future accidental dependencies to exp or old packages,
more robustly detect gold 2.20 (thanks Christopher Wedgwood),
pass $GCFLAGS to compiler,
stop on failed deps.bash.
* crypto/tls: add 3DES ciphersuites,
add server side SNI support,
fetch root CA from Windows store (thanks Mikkel Krautz),
fetch root certificates using Mac OS API (thanks Mikkel Krautz),
fix broken looping code in windows root CA fetcher (thanks Mikkel Krautz),
more Unix root certificate locations.
* crypto/x509: add code for dealing with PKIX public keys,
keep the raw Subject and Issuer.
* csv: fix overly aggressive TrimLeadingSpace.
* exp/ssh: general cleanups for client support (thanks Dave Cheney).
* exp/template/html: fix bug in cssEscaper.
* exp/terminal: split terminal handling from exp/ssh.
* exp/winfsnotify: filesystem watcher for Windows (thanks Hector Chu).
* fmt: fix test relying on map iteration order.
* gc: changes to export format in preparation for inlining,
pass FlagNoPointers to runtime.new,
preserve uint8 and byte distinction in errors and import data,
stricter multiple assignment + test,
treat uintptr as potentially containing a pointer.
* go/scanner: remove AllowIllegalChars mode.
* go/token: document deserialization property.
* gob: avoid one copy for every message written.
* godefs: add enum/const testdata (thanks Dave Cheney).
* godoc: generate package toc in template, not in JavaScript,
show "unexported" declarations when executing "godoc builtin",
show correct source name with -path.
* gofix: make fix order explicit, add mapdelete.
* gofmt: fix //line handling,
disallow rewrites for incomplete programs.
* gotest: avoid conflicts with the name of the tested package (thanks Esko Luontola),
test example code.
* goyacc: clean up after units (thanks Anthony Martin),
make more gofmt-compliant.
* html: add a Render function, various bug fixes and improvements,
parser improvements (thanks Andrew Balholm).
* http: DoS protection: cap non-Handler Request.Body reads,
RoundTrippers shouldn't mutate Request,
avoid panic caused by nil URL (thanks Anthony Martin),
fix read timeouts and closing,
remove Request.RawURL.
* image/tiff: implement PackBits decoding (thanks Benny Siegert).
* ld: fix "cannot create 8.out.exe" (thanks Jaroslavas Počepko).
* misc/emacs: add a "godoc" command, like M-x man (thanks Evan Martin).
* misc/swig: delete binaries (thanks Anthony Martin).
* misc/windows: automated toolchain packager (thanks Joe Poirier).
* net/windows: implement ip protocol name to number resolver (thanks Alex Brainman).
* net: add File method to IPConn (thanks Mikio Hara),
allow LookupSRV on non-standard DNS names,
fix "unexpected socket family" error from WriteToUDP (thanks Albert Strasheim),
fix socket leak in case of Dial failure (thanks Chris Farmiloe),
remove duplicate error information in Dial (thanks Andrey Mirtchovski),
return error from CloseRead and CloseWrite (thanks Albert Strasheim),
skip ICMP test on Windows too unless uid 0.
* reflect: disallow Interface method on Value obtained via unexported name,
make unsafe use of SliceHeader gc-friendly.
* rpc: don't panic on write error.
* runtime: faster strings,
fix crash if user sets MemProfileRate=0,
fix crash when returning from syscall during gc (thanks Hector Chu),
fix memory leak in parallel garbage collector.
* scanner: invalidate scanner.Position when no token is present.
* spec: define order of multiple assignment.
* syscall/windows: dll function load and calling changes (thanks Alex Brainman).
* syscall: add #ifdefs to fix the manual corrections in ztypes_linux_arm.go (thanks Dave Cheney),
adjust Mount to accomodate stricter FS implementations.
* testing: fix time reported for failing tests.
* utf8: add Valid and ValidString.
* websocket: tweak hybi ReadHandshake to support Firefox (thanks Luca Greco).
* xml: match Marshal's XMLName behavior in Unmarshal (thanks Chris Farmiloe).
</pre>
<h2 id="2011-10-06">2011-10-06</h2>
<pre>
This weekly snapshot includes changes to the io, image, and math packages that
may require changes to client code.
The io package's Copyn function has been renamed to CopyN.
The math package's Fabs, Fdim, Fmax, Fmin and Fmod functions
have been renamed to Abs, Dim, Max, Min, and Mod.
Parts of the image package have been moved to the new image/color package.
The spin-off renames some types. The new names are simply better:
image.Color -> color.Color
image.ColorModel -> color.Model
image.ColorModelFunc -> color.ModelFunc
image.PalettedColorModel -> color.Palette
image.RGBAColor -> color.RGBA
image.RGBAColorModel -> color.RGBAModel
image.RGBA64Color -> color.RGBA64
image.RGBA64ColorModel -> color.RGBA64Model
(similarly for NRGBAColor, GrayColorModel, etc)
The image.ColorImage type stays in the image package, but is renamed:
image.ColorImage -> image.Uniform
The image.Image implementations (image.RGBA, image.RGBA64, image.NRGBA,
image.Alpha, etc) do not change their name, and gain a nice symmetry:
an image.RGBA is an image of color.RGBA, etc.
The image.Black, image.Opaque uniform images remain unchanged (although their
type is renamed from image.ColorImage to image.Uniform).
The corresponding color types (color.Black, color.Opaque, etc) are new.
Nothing in the image/ycbcr is renamed yet. The ycbcr.YCbCrColor and
ycbcr.YCbCrImage types will eventually migrate to color.YCbCr and image.YCbCr,
at a later date.
* 5g/6g/8g: fix loop finding bug, fix -f(), registerize variables again.
* 5l/6l/8l: add a DT_DEBUG dynamic tag to a dynamic ELF binary.
* archive/zip: read and write unix file modes (thanks Gustavo Niemeyer).
* build: clear execute bit from source files (thanks Mikio Hara).
* bytes: add EqualFold.
* cgo: allow Windows path characters in flag directives (thanks Joe Poirier),
support for mingw-w64 4.5.1 and newer (thanks Wei Guangjing).
* codereview: extra repo sanity check,
fix for Mercurial 1.9.2,
fix hg change in Windows console (thanks Yasuhiro Matsumoto).
* crypto/elliptic: use %x consistently in error print.
* doc/spec: remove notes about gccgo limitations, now fixed.
* doc: add 'Debugging Go code with GDB' tutorial,
fix memory model read visibility bug.
* encoding/binary: PutX functions require buffer of sufficient size,
added benchmarks, support for varint encoding.
* exec: add Command.ExtraFiles.
* exp/sql{,/driver}: new database packages.
* exp/ssh: move common code to common.go (thanks Dave Cheney).
* exp/template/html: work continues.
* fmt: replace channel cache with slice.
* gc: limit helper threads based on ncpu.
* go/doc, godoc, gotest: support for reading example documentation.
* go: documentation and skeleton implementation of new command.
* gob: protect against invalid message length,
allow sequential decoders on the same input stream.
* hgpatch: do not use hg exit status (thanks Yasuhiro Matsumoto).
* http: add Location method to Response,
don't send a 400 Bad Request after a client shutdown.
* index/suffixarray: 4.5x faster index serialization (to memory).
* io/ioutil: add a comment on why devNull is a ReaderFrom.
* json: use strings.EqualFold instead of strings.ToLower.
* misc/emacs: fix indent bug.
* net: add shutdown: TCPConn.CloseWrite and CloseRead.
* net: use AF_UNSPEC instead of individual address family (thanks Mikio Hara).
* path/filepath: added Rel as the complement of Abs (thanks Gustavo Niemeyer).
* pkg/syscall: add Mkfifo for linux platforms.
* regexp: move to old/regexp, replace with exp/regexp, speedups.
* runtime/gdb: fix pretty printing of channels,
gracefully handle not being able to find types.
* runtime: check for nil value pointer in select syncsend case,
faster finalizers,
fix malloc sampling bug,
fix map memory leak,
fix spurious deadlock reporting,
fix usleep on linux/386 and re-enable parallel gc (thanks Hector Chu),
parallelize garbage collector mark + sweep.
* strconv: faster Unquote in common case.
* strings: add EqualFold, Replacer, NewReplacer.
* suffixarray: add benchmarks for construction (thanks Eric Eisner).
* syscall: add GetsockoptByte, SetsockoptByte for openbsd (thanks Mikio Hara),
add IPv4 ancillary data for linux (thanks Mikio Hara),
mark stdin, stdout, stderr non-inheritable by child processes (thanks Alex Brainman),
mksyscall_windows.pl creates non-syscall packages (thanks Jaroslavas Počepko),
update multicast socket options (thanks Mikio Hara).
* testing: support for running tests in parallel (thanks Miki Tebeka).
* time: make month/day name comparisons case insenstive.
* unicode: fix make tables.
* vim: Send GoFmt errors to a location list (thanks Paul Sbarra).
* websocket: add hybi-13 support, add mutex to make websocket full-duplex.
</pre>
<h2 id="2011-09-21">2011-09-21</h2>
<pre>
This weekly contains several improvements, bug fixes, and new packages.
* archive/tar: document Header fields and Type flags (thanks Mike Rosset).
* bytes: fix Replace so it actually copies (thanks Gustavo Niemeyer).
* cgo: use GOARCH from the environment (thanks Jaroslavas Počepko).
* codereview: save CL messages in $(hg root)/last-change.
* crypto/bcrypt: new package (thanks Jeff Hodges).
* crypto/blowfish: exposing the blowfish key schedule (thanks Jeff Hodges).
* doc: link to golang-france.
* doc: when configuring gold for gccgo, use --enable-gold=default.
* exp/norm: changed trie to produce smaller tables.
* exp/ssh: new package,
refactor halfConnection to transport (thanks Dave Cheney).
* exp/template/html: more fixes and improvements.
* filepath: fix Glob to return no error on nonmatching patterns.
* gc: disallow invalid map keys,
handle complex CONVNOP.
* gob: allocation fixes.
* godoc: simplify internal FileSystem interface.
* http/cgi: clean up environment (thanks Yasuhiro Matsumoto).
* http: always include Content-Length header, even for 0 (thanks Dave Grijalva),
check explicit wrong Request.ContentLength values,
fix TLS handshake blocking server accept loop,
prevent DumpRequest from adding implicit headers.
* httptest: add NewUnstartedServer.
* json: clearer Unmarshal doc,
skip nil in UnmarshalJSON and (for symmetry) MarshalJSON.
* net: use /etc/hosts first when looking up IP addresses (thanks Andrey Mirtchovski).
* reflect: add comment about the doubled semantics of Value.String.
* runtime: implement pprof support for windows (thanks Hector Chu),
increase stack system space on windows/amd64 (thanks Hector Chu).
* suffixarray: generate less garbage during construction (thanks Eric Eisner),
improved serialization code using gob instead of encoding/binary.
* sync/atomic: replace MFENCE with LOCK XADD.
</pre>
<h2 id="2011-09-16">2011-09-16</h2>
<pre>
This weekly snapshot includes changes to the image, path/filepath, and time
packages. Code that uses these packages may need to be updated.
The image package's NewX functions (NewRGBA, NewNRGBA, etc) have been changed
to take a Rectangle argument instead of a width and height.
Gofix can make these changes automatically.
The path/filepath package's Walk function has been changed to take a WalkFunc
function value instead of a Visitor interface value. WalkFunc is like the
Visitor's VisitDir and VisitFile methods except it handles both files and
directories:
func(path string, info *os.FileInfo, err os.Error) os.Error
To skip walking a directory (like returning false from VisitDir) the WalkFunc
must return SkipDir.
The time package's Time struct's Weekday field has been changed to a method.
The value is calculated on demand, avoiding the need to re-parse
programmatically-constructed Time values to find the correct weekday.
There are no gofixes for the filepath or time API changes, but instances of the
old APIs will be caught by the compiler. The Weekday one is easy to update by
hand. The Walk one may take more consideration, but will have fewer instances
to fix.
* build: add build comments to core packages.
* codereview: Mercurial 1.9 fix for hg diff @nnn.
* crypto/tls: handle non-TLS more robustly,
support SSLv3.
* debug/elf: permit another case of SHT_NOBITS section overlap in test.
* exm/template/html: more work on this auto-escaping HTML template package.
* exp/norm: added regression test tool for the standard Unicode test set.
* exp/regexp/syntax: fix invalid input parser crash,
import all RE2 parse tests + fix bugs.
* exp/regexp: add MustCompilePOSIX, CompilePOSIX, leftmost-longest matching.
* flag: make zero FlagSet useful.
* gc: clean up if grammar.
* go/build: handle cgo, // +build comments.
* go/printer: use panic/defer instead of goroutine for handling errors.
* go/token: support to serialize file sets.
* godoc, suffixarray: switch to exp/regexp.
* godoc: show packages matching a query at the top,
support for complete index serialization,
use go/build to find files in a package.
* gofmt: accept program fragments on standard input, add else test.
* http/cgi: add openbsd environment configuration.
* http: document that Response.Body is non-nil.
* image/png: don't use a goroutine to decode, to permit decode during init.
* json: if a field's tag is "-", ignore the field for encoding and decoding.
* ld: grow dwarf includestack on demand.
* net, syscall: implement SetsockoptIPMReq(), and
move to winsock v2.2 for multicast support (thanks Paul Lalonde).
* net: add a LookupTXT function.
* os: os.RemoveAll to check for wboth error codes on Windows (thanks Jaroslavas Počepko).
* path/filepath: fix Visitor doc (thanks Gustavo Niemeyer),
make UNC file names work (thanks Yasuhiro Matsumoto).
* runtime: optimizations to channels on Windows (thanks Hector Chu),
syscall to return both AX and DX for windows/386 (thanks Alex Brainman).
* sync/atomic: add 64-bit Load and Store.
* syscall: add route flags for linux (thanks Mikio Hara).
* test: add test for inheriting private method from anonymous field.
* websocket: fix infinite recursion in Addr.String() (thanks Tarmigan Casebolt),
rename websocket.WebSocketAddr to *websocket.Addr.
</pre>
<h2 id="2011-09-07">2011-09-07</h2>
<pre>
This weekly snapshot consists of improvements and bug fixes, including fixes
for issues introduced by escape analysis changes in the gc compiler.
* build: clear execute bit from Go files (thanks Mike Rosset),
error out if problem with sudo.bash /usr/local/bin (thanks Mike Rosset).
* exp/norm: add Reader and Writer,
performance improvements of quickSpan.
* exp/regexp: bug fixes and RE2 tests.
* exp/template/html: string replacement refactoring,
tweaks to js{,_test}.go.
* gc: add -p flag to catch import cycles earlier,
fix label recursion bugs,
fix zero-length struct eval,
zero stack-allocated slice backing arrays,
* gc, ld: fix Windows file paths (thanks Hector Chu).
* go/parser: accept corner cases of signature syntax.
* gobuilder: ignore _test.go files when looking for docs, more logging.
* godoc: minor tweaks for App Engine use.
* gofix: do not convert url in field names (thanks Gustavo Niemeyer).
* gofmt: indent multi-line signatures.
* gopprof: regexp fixes (thanks Hector Chu).
* image/png: check zlib checksum during Decode.
* libmach: fix incorrect use of memset (thanks Dave Cheney).
* misc/goplay: fix template output.
* net: ParseCIDR returns IPNet instead of IPMask (thanks Mikio Hara),
sync CIDRMask code, doc.
* os: use GetFileAttributesEx to implement Stat on windows (thanks Alex Brainman).
* runtime: fix openbsd 386 raisesigpipe,
implement exception handling on windows/amd64 (thanks Hector Chu),
test for concurrent channel consumers (thanks Christopher Wedgwood).
* sort: use heapsort to bail out quicksort (thanks Ziad Hatahet).
* sync/atomic: add LoadUintptr, add Store functions.
* syscall: update routing message attributes handling (thanks Mikio Hara).
* template: fix deadlock,
indirect or dereference function arguments if necessary,
slightly simplify the test for assignability of arguments.
* url: handle ; in ParseQuery.
* websocket: fix incorrect prints found by govet (thanks Robert Hencke).
</pre>
<h2 id="2011-09-01">2011-09-01</h2>
<pre>
This weekly contains performance improvements and bug fixes.
The gc compiler now does escape analysis, which improves program performance
by placing variables on the call stack instead of the heap when it is safe to
do so.
The container/vector package is deprecated and will be removed at some point
in the future.
Other changes:
* archive/tar: support symlinks. (thanks Mike Rosset)
* big: fix nat.scan bug. (thanks Evan Shaw)
* bufio: handle a "\r\n" that straddles the buffer.
add openbsd.
avoid redundant bss declarations.
fix unused parameters.
fix windows/amd64 build with newest mingw-w64. (thanks Hector Chu)
* bytes: clarify that NewBuffer is not for beginners.
* cgo: explain how to free something.
fix GoBytes. (thanks Gustavo Niemeyer)
fixes callback for windows amd64. (thanks Wei Guangjing)
note that CString result must be freed. (thanks Gustavo Niemeyer)
* cov: remove tautological #defines. (thanks Lucio De Re)
* dashboard: yet another utf-8 fix.
* doc/codelab/wiki: fix Makefile.
* doc/progs: fix windows/amd64. (thanks Jaroslavas Počepko)
* doc/tmpltohtml: update to new template package.
* doc: emphasize that environment variables are optional.
* effective_go: convert to use tmpltohtml.
* exp/norm: reduced the size of the byte buffer used by reorderBuffer by half by reusing space when combining.
a few minor fixes to support the implementation of norm.
added implementation for []byte versions of methods.
* exp/template/html: add some tests for ">" attributes.
added handling for URL attributes.
differentiate URL-valued attributes (such as href).
reworked escapeText to recognize attr boundaries.
* exp/wingui: made compatible with windows/amd64. (thanks Jaroslavas Počepko)
* flag: add Parsed, restore Usage.
* gc: add openbsd.
escape analysis.
fix build on Plan 9. (thanks Lucio De Re)
fix div bug.
fix pc/line table. (thanks Julian Phillips)
fix some spurious leaks.
make static initialization more static.
remove JCXZ; add JCXZW, JCXZL, and JCXZQ instructions. (thanks Jaroslavas Počepko)
shuffle #includes.
simplify escape analysis recursion.
tweak and enable escape analysis.
* go/ast cleanup: base File/PackageExports on FilterFile/FilterPackage code.
adjustments to filter function.
fix ast.MergePackageFiles to collect infos about imports. (thanks Sebastien Binet)
generalize ast.FilterFile.
* go/build: add test support & use in gotest.
separate test imports out when scanning. (thanks Gustavo Niemeyer)
* go/parser: fix type switch scoping.
fix type switch scoping.
* gob: explain that Debug isn't useful unless it's compiled in.
* gobuilder: increase log limit.
* godashboard: fix utf-8 in user names.
* godoc: first step towards reducing index size.
add dummy playground.js to silence godoc warning at start-up.
added systematic throttling to indexing goroutine.
fix bug in zip.go.
support for reading/writing (splitted) index files.
use virtual file system when generating package synopses.
* gofix: forgot to rename the URL type.
osopen: fixed=true when changing O_CREAT. (thanks Tarmigan Casebolt)
* goinstall: error out with paths that end with '/'. (thanks Tarmigan Casebolt)
report lack of $GOPATH on errors. (thanks Gustavo Niemeyer)
select the tag that is closest to runtime.Version.
* gotry: add missing $. (thanks Tarmigan Casebolt)
* http: add MaxBytesReader to limit request body size.
add file protocol transport.
adjust test threshold for larger suse buffers.
delete error kludge.
on invalid request, send 400 response.
return 413 instead of 400 when the request body is too large. (thanks Dave Cheney)
support setting Transport's TLS client config.
* image/tiff: add a decode benchmark. (thanks Benny Siegert)
decoder optimization. (thanks Benny Siegert)
* image: add PalettedImage interface, and make image/png recognize it. (thanks Jaroslavas Počepko)
* io: add TeeReader. (thanks Hector Chu)
* json: add struct tag option to wrap literals in strings.
calculate Offset for Indent correctly. (thanks Jeff Hodges)
fix decode bug with struct tag names with ,opts being ignored.
* ld: handle Plan 9 ar format. (thanks Lucio De Re)
remove duplicate bss definitions.
* libmach: support reading symbols from Windows .exe for nm. (thanks Mateusz Czapliński)
* math: fix Pow10 loop. (thanks Volker Dobler)
* mime: ParseMediaType returns os.Error now, not a nil map.
media type formatter. (thanks Pascal S. de Kloe)
text charset defaults. (thanks Pascal S. de Kloe)
* misc/dashboard: remove limit for json package list.
* misc/emacs: refine label detection.
* net: add ParseMAC function. (thanks Paul Borman)
change the internal form of IPMask for IPv4. (thanks Mikio Hara)
disable "tcp" test on openbsd.
fix windows build. (thanks Alex Brainman)
join and leave a IPv6 group address, on a specific interface. (thanks Mikio Hara)
make use of IPv4len, IPv6len. (thanks Mikio Hara)
move internal string manipulation routines to parse.go. (thanks Mikio Hara)
* os: disable Hostname test on OpenBSD.
fix WNOHANG Waitmsg. (thanks Gustavo Niemeyer)
* reflect: add Value.Bytes, Value.SetBytes methods.
* rpc: add benchmark for async rpc calls.
* runtime: add openbsd 386 defs.h.
add runtime support for openbsd 386.
add runtime· prefix to showframe.
ctrlhandler for windows amd64. (thanks Wei Guangjing)
fix stack cleanup on windows/amd64. (thanks Hector Chu)
fix void warnings.
go interface to cdecl calbacks. (thanks Jaroslavas Počepko)
handle string + char literals in goc2c.
make arm work on Ubuntu Natty qemu.
openbsd thread tweaks.
simplify stack traces.
speed up cgo calls. (thanks Alex Brainman)
use cgo runtime functions to call windows syscalls. (thanks Alex Brainman)
windows/amd64 callbacks fixed and syscall fixed to allow using it in callbacks. (thanks Jaroslavas Počepko)
* strconv: put decimal on stack.
* spec: update section on Implementation Differences.
* syscall: SOMAXCONN should be 0x7fffffff at winsock2. (thanks Yasuhiro Matsumoto)
add openbsd 386.
handle RTM_NEWROUTE in ParseNetlinkRouteAttr on Linux. (thanks Albert Strasheim)
handle routing entry in ParseRoutingSockaddr on BSD variants. (thanks Mikio Hara)
openbsd amd64 syscall support.
use the vdso page on linux x86 for faster syscalls instead of int $0x80. (thanks Yuval Pavel Zholkover)
* template/parse: give if, range, and with a common representation.
* template: grammar fix for template documentation. (thanks Bill Neubauer)
range over channel.
remove else and end nodes from public view.
* test: put GOROOT/bin before all others in run.
* time: fix Plan 9 build. (thanks Fazlul Shahriar)
fix zone during windows test.
* type switches: test for pathological case.
* version.bash: update VERSION on -save if already present. (thanks Gustavo Niemeyer)
* websocket: implements new version of WebSocket protocol. (thanks Fumitoshi Ukai)
* windows/386: clean stack after syscall. (thanks Jaroslavas Počepko)
* xml: marshal "parent>child" tags correctly. (thanks Ross Light)
</pre>
<h2 id="2011-08-17">2011-08-17 (<a href="release.html#r60">base for r60</a>)</h2>
<pre>
This weekly contains some package re-shuffling. Users of the http and
template packages may be affected.
This weekly replaces the template package with exp/template.
The original template package is still available as old/template.
The old/template package is deprecated and will be removed at some point
in the future. The Go tree has been updated to use the new template package.
We encourage users of the old template package to switch to the new one.