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hg update weekly.<i>YYYY-MM-DD</i>
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<h2 id="2011-07-07">2011-07-07 (<a href="release.html#r59">base for r59</a>)</h2>
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This weekly snapshot includes changes to the strings, http, reflect, json, and
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xml packages. Code that uses these packages will need changes. Most of these
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changes can be made automatically with gofix.
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The strings package's Split function has itself been split into Split and
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SplitN. SplitN is the same as the old Split. The new Split is equivalent to
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SplitN with a final argument of -1.
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The http package has a new FileSystem interface that provides access to files.
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The FileServer helper now takes a FileSystem argument instead of an explicit
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file system root. By implementing your own FileSystem you can use the
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FileServer to serve arbitrary data.
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The reflect package supports a new struct tag scheme that enables sharing of
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struct tags between multiple packages.
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In this scheme, the tags must be of the form:
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key:"value" key2:"value2"
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reflect.StructField's Tag field now has type StructTag (a string type), which
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has method Get(key string) string that returns the associated value.
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Clients of json and xml will need to be updated. Code that says
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X int `json:"name"` // or `xml:"name"`
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Use govet to identify struct tags that need to be changed to use the new syntax.
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* 5l, 6l, 8l: drop use of ed during build.
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* asn1: support T61 and UTF8 string.
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* bufio: do not cache Read errors (thanks Graham Miller).
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* build: make version.bash aware of branches.
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* cgi: don't depend on CGI.pm for tests.
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* codereview: make --ignore_hgpatch_failure work again,
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restrict sync to default branch.
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* crypto/openpgp: add ability to reserialize keys,
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bug fix (thanks Gideon Jan-Wessel Redelinghuys).
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* crypto/tls: fix generate_cert.go.
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* crypto/x509: prevent chain cycles in Verify.
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* doc: remove ed from apt-get package list.
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* docs: fold the prog.sh scripting from makehtml into htmlgen itself.
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* ebnflint: better handling of stdin.
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* exp/regexp/syntax: new experimental RE2-based regexp implementation.
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* exp/template: a new experimental templating package.
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* fmt: add SkipSpace to fmt's ScanState interface.
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* fmt: rename errno and error to err for doc consistency.
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* gc: avoid package name ambiguity in error messages,
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fix package quoting logic,
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fixes for Plan 9 (thanks Lucio De Re).
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* go/build: evaluate symlinks before comparing path to GOPATH.
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* gob: use exported fields in structs in the package documentation.
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* godoc: ignore directories that begin with '.',
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search GOPATH for documentation.
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* gofix: os/signal, path/filepath, and sort fixes (thanks Robert Hencke),
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* goinstall: add support for generic hosts (thanks Julian Phillips),
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only report successfully-installed packages to the dashboard,
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try to access via https (thanks Yasuhiro Matsumoto).
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* gotest: add -test.benchtime and -test.cpu flags.
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* html: fixes and improvements (thanks Yasuhiro Matsumoto).
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* http/cgi: add Handler.Dir to specify working directory (thanks Yasuhiro Matsumoto).
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* http: add StripPrefix handler wrapper,
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assume ContentLength 0 on GET requests,
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better handling of 0-length Request.Body,
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do TLS handshake explicitly before copying TLS state,
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document that ServerConn and ClientConn are low-level,
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make NewChunkedReader public (thanks Andrew Balholm),
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respect Handlers setting Connection: close in their response.
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* image: more tests, Paletted.Opaque optimization.
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* io.WriteString: if the object has a WriteString method, use it (thanks Evan Shaw).
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* ld: elide the Go symbol table when using -s (thanks Anthony Martin).
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* ld: fix ELF strip by removing overlap of sections (thanks Gustavo Niemeyer).
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* mime/multipart: parse LF-delimited messages, not just CRLF.
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* mime: permit lower-case media type parameters (thanks Pascal S. de Kloe).
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* misc/dashboard: new features and improvements (not yet deployed).
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* misc/emacs: update list of builtins (thanks Quan Yong Zhai).
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* misc/vim: allow only utf-8 for file encoding (thanks Yasuhiro Matsumoto).
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* os: fix documentation for FileInfo.Name,
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simplify WriteString,
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use a different symbol from syscall in mkunixsignals.sh.
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* path/filepath: enable TestWalk to run on windows (thanks Alex Brainman).
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* reflect: add MethodByName,
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allow Len on String values.
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* regexp: document that Regexp is thread-safe.
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* runtime/cgo: check for errors from pthread_create (thanks Albert Strasheim).
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* runtime: add Semacquire/Semrelease benchmarks,
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improved Semacquire/Semrelease implementation,
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windows/amd64 port (thanks Wei Guangjing).
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* sync: add fast path to Once,
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improve Mutex to allow successive acquisitions,
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new and improved benchmarks.
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* syscall: regenerate zerrors for darwin/linux/freebsd,
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support for tty options in StartProcess (thanks Ken Rockot).
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* testing: make ResetTimer not start/stop the timer,
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scale benchmark precision to 0.01ns if needed.
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* time: zero-pad two-digit years.
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* unicode/maketables: update debugging data.
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* windows: define and use syscall.Handle (thanks Wei Guangjing).
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* xml: add Marshal and MarshalIndent.
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<h2 id="2011-06-23">2011-06-23</h2>
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This release includes a language change that restricts the use of goto.
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In essence, a "goto" statement outside a block cannot jump to a label inside
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that block. Your code may require changes if it uses goto.
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This changeset shows how the new rule affected the Go tree:
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http://code.google.com/p/go/source/detail?r=dc6d3cf9279d
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The os.ErrorString type has been hidden. If your code uses os.ErrorString it
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must be changed. Most uses of os.ErrorString can be replaced with os.NewError.
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* 5c: do not use R9 and R10.
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* 8l: more fixes for Plan 9 (thanks Lucio De Re).
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* build: Make.ccmd: link with mach lib (thanks Joe Poirier).
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* build: exclude packages that fail on Plan 9 (thanks Anthony Martin).
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* cc: nit: silence comment warnings (thanks Dave Cheney).
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* codereview.py: note that hg change -d abandons a change list (thanks Robert Hencke).
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* crypto/openpgp: add ElGamal support.
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* doc/faq: add question about converting from []T to []interface{}.
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* doc: Effective Go: fix variadic function example (thanks Ben Lynn).
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* exec: LookPath should not search %PATH% for files like c:cmd.exe (thanks Alex Brainman),
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add support for Plan 9 (thanks Anthony Martin),
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better error message for windows LookPath (thanks Alex Brainman).
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* fmt: catch panics from calls to String etc.
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* gc: descriptive panic for nil pointer -> value method call,
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implement goto restriction,
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unsafe.Alignof, unsafe.Offsetof, unsafe.Sizeof now return uintptr.
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* go/build: include Import objects in Script Inputs.
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* godefs: rudimentary tests (thanks Robert Hencke).
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* goinstall: refactor and generalize repo handling code (thanks Julian Phillips),
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temporarily use Makefiles by default (override with -make=false).
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* gopprof: update list of memory allocators.
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* http: add Server.ListenAndServeTLS,
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buffer request.Write,
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fix req.Cookie(name) with cookies in one header,
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permit handlers to explicitly remove the Date header,
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write Header keys with empty values.
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* image: basic test for the 16-bits-per-color-channel types.
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* io: clarify Read, ReadAt, Copy, Copyn EOF behavior.
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* ld: don't attempt to build dynamic sections unnecessarily (thanks Gustavo Niemeyer).
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* libmach: fix disassembly of FCMOVcc and FCOMI (thanks Anthony Martin),
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fix tracing on linux (for cov) (thanks Anthony Martin).
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* mime: fix RFC references (thanks Pascal S. de Kloe).
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* misc/gobuilder: run make single-threaded on windows (thanks Alex Brainman).
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* misc/godashboard: Accept sub-directories for goinstall's report (thanks Yasuhiro Matsumoto).
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* nacl, tiny: remove vestiges (thanks Robert Hencke).
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* net, syscall: interface for windows (thanks Yasuhiro Matsumoto).
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* os: change Waitmsg String method to use pointer receiver (thanks Graham Miller).
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* runtime: don't use twice the memory with grsec-like kernels (thanks Gustavo Niemeyer),
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* spec: disallow goto into blocks.
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* sync: restore GOMAXPROCS during benchmarks.
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* syscall: add LSF support for linux (thanks Mikio Hara),
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add socket control message support for darwin, freebsd, linux (thanks Mikio Hara),
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add tty support to StartProcess (thanks Ken Rockot),
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fix build for Sizeof change.
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* test: test of goto restrictions.
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* time: add support for Plan 9 (thanks Anthony Martin).
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<h2 id="2011-06-16">2011-06-16</h2>
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This release includes changes to the sort and image/draw packages that will
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require changes to client code.
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The sort.IntArray type has been renamed to IntSlice, and similarly for
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StringArray and Float64Array.
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The image/draw package’s Draw function now takes an additional argument,
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a compositing operator. If in doubt, use draw.Over.
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* build: fix header files for Plan 9 (thanks Lucio De Re).
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* cgo: handle new Apple LLVM-based gcc from Xcode 4.2.
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* crypto/openpgp: add ability to encrypt and sign messages.
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* doc/gopher: add goggled gopher logo for App Engine.
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* doc: Update notes for 3-day Go course.
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* exec: make LookPath work when PATHEXT var not set on Windows (thanks Alex Brainman).
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* exp/regexp/syntax: syntax data structures, parser, escapes, character classes.
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* exp/template: lexical scanner for new template package.
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* fmt: debugging formats for characters: %+q %#U.
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* gc: frame compaction for arm,
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handle go print() and go println(),
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work around goto bug.
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* go/build: fixes, self-contained tests.
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* go/printer, gofmt: print "select {}" on one line.
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* godoc: replace OS file system accesses in favor of a FileSystem interface.
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* gofix: fix inconsistent indentation in help output (thanks Scott Lawrence).
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* goinstall: use go/build package to scan and build packages.
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* http/spdy: improve error handling (thanks William Chan).
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* http: use runtime/debug.Stack() to dump stack trace on panic.
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* ld: dwarf emit filenames in debug_line header instead of as extended opcodes,
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fix link Windows PE __declspec(dllimport) symbol (thanks Wei Guangjing),
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make .rodata section read-only (thanks Gustavo Niemeyer).
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* mail: decode RFC 2047 "B" encoding.
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* mime/multipart: remove temp files after tests on Windows (thanks Alex Brainman).
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* net: export all fields in Interface (thanks Mikio Hara),
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rearrange source to run more tests on Windows (thanks Alex Brainman),
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sendfile for win32 (thanks Yasuhiro Matsumoto).
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* os: Plan 9, fix OpenFile & Chmod, add Process.Kill (thanks Yuval Pavel Zholkover).
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* runtime: fix Plan 9 "lingering goroutines bug" (thanks Yuval Pavel Zholkover).
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* spec: clarify rules for append, scope rules for :=,
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specify constant conversions,
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unsafe.Alignof/Offsetof/Sizeof return uintptr.
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* syscall, os, exec: add *syscall.SysProcAttr field to os.ProcAttr and exec.Cmd.
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* syscall: add ptrace on darwin (thanks Jeff Hodges),
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mksyscall_windows.pl should output unix newline (thanks Yasuhiro Matsumoto).
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update BPF support for BSD variants (thanks Mikio Hara),
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use strict in perl scripts (thanks Yasuhiro Matsumoto).
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* xml: handle non-string attribute fields (thanks Maxim Ushakov).
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<h2 id="2011-06-09">2011-06-09 (<a href="release.html#r58">base for r58</a>)</h2>
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removed
doc/devel/weekly.html
