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The Go programming language
4c6454aecf
This adds support for {{template "callee"}} calls.
It recognizes that calls can appear in many contexts.
{{if .ImageURL}}
<img src="{{.ImageURL}}" alt="{{template "description"}}">
{{else}}
<p>{{template "description"}}</p>
{{end}}
calls a template in two different contexts, first in an HTML attribute
context, and second in an HTML text context.
Those two contexts aren't very different, but when linking text
to search terms, the escaping context can be materially different:
<a href="/search?q={{template "tags"}}">{{template "tags"}}</a>
This adds API:
EscapeSet(*template.Set, names ...string) os.Error
takes a set of templates and the names of those which might be called
in the default context as starting points.
It changes the escape* functions to be methods of an object which
maintains a conceptual mapping of
(template names*input context) -> output context.
The actual mapping uses as key a mangled name which combines the
template name with the input context.
The mangled name when the input context is the default context is the
same as the unmangled name.
When a template is called in multiple contexts, we clone the template.
{{define "tagLink"}}
<a href="/search?q={{template "tags"}}">{{template "tags"}}</a>
{{end}}
{{define "tags"}}
{{range .Tags}}{{.}},{{end}}
{{end}}
given []string{ "foo", "O'Reilly", "bar" } produces
<a href="/search?q=foo,O%27Reilly,bar">foo,O'Reilly,bar</a>
This involves rewriting the above to something like
{{define "tagLink"}}
<a href="/search?q={{template "tags$1"}}">{{template "tags"}}</a>
{{end}}
{{define "tags"}}
{{range .Tags}}{{. | html}},{{end}}
{{end}}
{{define "tags$1"}}
{{range .Tags}}{{. | urlquery}},{{end}}
{{end}}
clone.go provides a mechanism for cloning template "tags" to produce
"tags$1".
changes to escape.go implement the new API and context propagation
around the call graph.
context.go includes minor changes to support name mangling and
context_test.go tests those.
js.go contains a bug-fix.
R=nigeltao, r
CC=golang-dev
https://golang.org/cl/4969072
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This is the source code repository for the Go programming language.
For documentation about how to install and use Go,
visit http://golang.org/ or load doc/install.html in your web browser.
After installing Go, you can view a nicely formatted
doc/install.html by running godoc --http=:6060
and then visiting http://localhost:6060/doc/install.html.
Unless otherwise noted, the Go source files are distributed
under the BSD-style license found in the LICENSE file.
--
Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set
the environment variable $GOROOT to the full path of the go
directory (the one containing this README). You can omit the
variable if you unpack it into /usr/local/go, or if you rebuild
from sources by running all.bash (see doc/install.html).
You should also add the Go binary directory $GOROOT/bin
to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might
put the following in your .profile:
export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See doc/install.html for more details.