Commit d3f8f0c

<h2 id="2012-02-07">2012-02-07</h2>

This weekly snapshot includes a re-organization of the Go tools.

Only the go, godoc, and gofmt tools are installed to $GOROOT/bin (or $GOBIN).

The remainder are installed to $GOROOT/bin/tool.

This puts the lesser-used tools (6g, cgo, govet, etc.) outside the user PATH.

Instead these tools may be called through the go tool with 'go tool command'.

For example, to vet hello.go you would type 'go tool vet hello.go'.

Type 'go tool' see the list of available tools.

With the move, some tools were given simpler names:

6cov -&gt; cov

6nm -&gt; nm

goapi -&gt; api

gofix -&gt; fix

gopack -&gt; pack

gopprof -&gt; pprof

govet -&gt; vet

goyacc -&gt; yacc

The os/signal package has been moved to exp/signal.

A new tool named 'dist' has been introduced to handle building the gc tool

chain and to bootstrap the go tool. The old build scripts and make files

have been removed.

Other changes:

* 5a, 6a, 8a, cc: check in y.tab.[ch].

* 5l, 6l, 8l, ld: remove memory leaks (thanks Shenghou Ma).

* 5l, 6l, 8l: implement -X flag.

* 5l: make -v option output less nonessential clutter (thanks Shenghou Ma),

optimize the common case in patch() (thanks Shenghou Ma).

* 8a, 8l: implement support for RDTSC instruction (thanks Shenghou Ma).

* 8g: use uintptr for local pc.

* archive/zip: support full range of FileMode flags (thanks Gustavo Niemeyer).

* bufio: remove special error type, update docs.

* build: move the "-c" flag into HOST_CFLAGS (thanks Anthony Martin),

remove unnecessary pragmas (thanks Anthony Martin).

* builder: drop recover blocks.

* bytes: API tweaks.

* cgo: accept null pointers in gccgo flavour of C.GoString (thanks Rémy Oudompheng),

print line numbers in fatal errors when relevant (thanks Rémy Oudompheng).

* cmd/dist: add GOBIN to env's output (thanks Gustavo Niemeyer),

fix bug in bsubst (thanks Alex Brainman),

fix build on openbsd (thanks Mikio Hara),

generate files for package runtime,

ignore file names beginning with . or _,

prevent race on VERSION creation (thanks Gustavo Niemeyer).

* cmd/gc: another special (%hhS) case for method names,

describe debugging flags (thanks Anthony Martin),

diagnose \ in import path,

disallow switch _ := v.(type),

don't print implicit type on struct literal in export,

fix codegen reordering for expressions involving && and ||,

use octal escapes in mkopnames (thanks Anthony Martin).

use original constant expression in error messages (thanks Rémy Oudompheng).

* cmd/go: add support for release tags via git branches (thanks Gustavo Niemeyer),

build: print import errors when invoked on files (thanks Kyle Lemons),

clean test directories as they complete,

fix error message on non-existing tools (thanks Rémy Oudompheng),

fix handling of gccgo standard library (thanks Rémy Oudompheng),

fixed panic on `go clean -n` and `go clean -x` (thanks Sanjay Menakuru),

introduce support for "go build" with gccgo (thanks Rémy Oudompheng),

make vcs command actually gather output (thanks Roger Peppe),

pass env CGO_CFLAGS to cgo (thanks Jeff Hodges),

record location of failed imports for error reporting (thanks Rémy Oudompheng).

* cmd/goapi: expand embedded interfaces.

* cmd/goinstall: remove now that 'go get' works (thanks Gustavo Niemeyer).

* cmd/ld: fix gdbscript (thanks Wei Guangjing).

* cmd/pack: change gopack to pack in error messages.

* codereview: miscellaneous fixes and improvements.

* crypto/elliptic: p224Contract could produce a non-minimal representation.

* crypto/tls: better error message when connecting to SSLv3 servers.

* crypto/x509: use case-insensitive hostname matching.

* dashboard: support for sub-repositories, update to go1beta.

* database/sql: permit scanning into interface{}.

* doc: update go1.html for recent changes.

* encoding/base32: add DecodeString and EncodeToString helper methods,

ignore new line characters during decode.

* encoding/base64: ignore new line characters during decode.

* encoding/gob: document CommonType.

* encoding/hex: canonicalize error type names.

* encoding/json: call (*T).MarshalJSON for addressable T values.

* encoding/xml: fix decoding of xml.Name with sub-elements (thanks Gustavo Niemeyer),

fix documentation for Decoder.Skip.

* exp/norm: Added some benchmarks for form-specific performance measurements,

a few minor changes in prepration for a table format change.

* expvar: revise API.

* fix: add image/{bmp,tiff} to go1pkgrename.

* flag: allow a FlagSet to not write to os.Stderr,

describe valid input for Duration flags.

* fmt: add test of NaN map keys,

fix caching bug in Scan.

* go/build: put a space between 'generated by make' and package statement,

update syslist.go package comment.

* go/doc: fix URL linking in ToHTML (thanks Gary Burd),

added error, rune to list of predeclared types,

don't lose factory functions of non-exported types,

don't show methods of exported anonymous fields,

enable AllMethods flag (and fix logic).

* go/printer: don't print incorrect programs.

* go/scanner: idiomatic receiver names.

* go/spec: update language on map types.

* go/token: remove dependency on encoding/gob.

* gob: fuzz testing, plus a fix for very large type names.

* gobuilder: use go tool to build and test sub-repositories.

* godoc: add URL mode m=methods,

diagnostic for empty FS tree,

fix identifier search,

fix redirect loop for URL "/",

provide link to subdirectories, if any,

sort list of "other packages",

update metadata in appinit.go.

* gophertool: fix link to the build status dashboard (thanks Jongmin Kim).

* hgignore: add VERSION.cache (thanks Gustavo Niemeyer),

delete dregs, ignore tmpltohtml.

* html: add package doc.

* image: add package docs, rename s/UnknownFormatError/ErrFormat/ and,

delete the image.Repeated type,

remove image/bmp and image/tiff from std.

* io/ioutil: document EOF behavior in ReadFile and ReadAll.

* io: API tweaks.

* libmach: add stubs for Plan 9 (thanks Anthony Martin).

* make.bash: don't remove hgpatch.

* math/big: add raw access to Int bits,

API and documentation cleanup.

* misc/goplay: use go tool "run" (thanks Olivier Duperray).

* misc/osx: don't set GOROOT or modify profile files,

update for dist tool, drop image.bash, update readme.

* net, syscall: add IPv4 multicast helpers for windows (thanks Mikio Hara).

* net/http/httputil: fix race in DumpRequestOut,

preserve query params in reverse proxy.

* net/http: don't set Content-Type header for HEAD requests by default (thanks Patrick Mylund Nielsen),

fix nil pointer dereference in error case (thanks Volker Dobler),

close client fd sooner on response read error,

set cookies in client jar on POST requests (thanks Volker Dobler).

* net/rpc: fix data race on Call.Error.

* net: ListenMulticastUDP to listen concurrently across multiple listeners (thanks Mikio Hara),

disable normal multicast testing on linux/arm (thanks Mikio Hara),

fix Plan 9 build (thanks Anthony Martin),

fix windows build (thanks Alex Brainman),

move DNSConfigError to a portable file,

remove types InvalidConnError and UnknownSocketError,

replace error variable name e, errno with err (thanks Mikio Hara),

run TestDialTimeout on windows (thanks Alex Brainman),

update comments to remove redundant "net" prefix (thanks Mikio Hara).

* os/exec: TestExtraFiles - close any leaked file descriptors,

make sure file is not closed early in leaked fd test.

* os/signal: move to exp/signal.

* os/user: windows implementation (thanks Alex Brainman).

* os: Process.handle use syscall.Handle (thanks Wei Guangjing),

file windows use syscall.InvalidHandle instead of -1 (thanks Wei Guangjing),

remove SIGXXX signals variables,

turn FileStat.Sys into a method on FileInfo (thanks Gustavo Niemeyer).

* path/filepath: repair and simplify the symlink test.

* reflect: add comment about Type.Field allocation,

test that PtrTo returns types that match program types.

* runtime: add runtime.cputicks() and seed fastrand with it (thanks Damian Gryski),

delete UpdateMemStats, replace with ReadMemStats(&stats) (thanks Rémy Oudompheng),

fix float64 hash,

use GOTRACEBACK to decide whether to show runtime frames,

use per-map hash seeds (thanks Damian Gryski).

* spec: add number to the fibonacci sequence.

* std: add struct field tags to untagged literals.

* strings: add Fields example.

* syscall: add Timeval.Nano, Timespec.Nano, for conversion to Duration,

cache environment variables on Plan 9 (thanks Anthony Martin),

fix // +build comments in types_*.go,

fix build directive in types_linux.go,

update bootstrap scripts to sync with new go command (thanks Mikio Hara).

* test: add import test that caused an incorrect gccgo error,

add test for receiver named _,

add test of NaN in map,

add test which crashed gccgo compiler,

don't use package main for files without a main function,

fix bug headers,

float to integer test case,

make map nan timing test more robust,

match gccgo error messages,

test append with two different named types with same element type,

test method expressions with parameters, and with import,

test slice beyond len,

test that x := &lt;-c accepts a general expression.

* testing: capture panics, present them, and mark the test as a failure.

* unicode: document large var blocks and the SpecialCase vars.

* vet: add a check for untagged struct literals.