Category: Erlang

最近公司代码需要在非erlang的系统上执行，需要能在独立的环境里运行erlang。研究甚久，于是写下这篇博文。国内用erlang的朋友不多，希望这篇blog能对有需要的朋友起到参考作用。

Application-Vsn/ebin
/include
/priv
/src
/Application-Vsn.rel

 

以上是代码的目录表.

{release, {“nextim”, “2.0″},
{erts, “5.7.5″},
[{kernel, "2.12.3"},
{stdlib, "1.15.3"},
{sasl, "2.1.5.3"}]
}.

 

以上是Application-Vsn.rel的内容,[]中是代码本身需要的lib。

1.执行erl -pa ./ebin . 这一步会生成nextim-2.boot文件

1> systools:make_script(nextim-2″, [local]).
ok

 

2.erl -boot nextim-2 . 这一步会生成nextim-2.tar.gz

systools:make_tar(“nextim-2″).

 

3.现在建议把tar.gz文件放到独立的路径里 这样不会影响Application-Vsn文件夹 ，然后解压 并进入目录， 复制erlang系统目录里的 erts-5.7.5 到当前目录

4.建立bin文件夹 复制  <span style="font-family: Arial;">erts-5.7.5/bin/start</span> 到 <span style="color: #ff0000; font-family: Arial;">bin/</span><span style="font-family: Arial;"> 编辑 </span><span style="color: #ff0000; font-family: Arial;">bin/start</span><span style="font-family: Arial;"> 改 </span><span style="color: #ff9900; font-family: Arial;">ROOTDIR</span><span style="font-family: Arial;">为当前目录的路径</span>

5.复制 <span style="font-family: Arial;">erts-5.7.5/bin/run_erl</span> <span style="font-family: Arial;">和 </span> <span style="font-family: Arial;">erts-5.7.2/bin/erl</span> <span style="font-family: Arial;"> 到 </span><span style="color: #ff0000; font-family: Arial;">bin</span><span style="font-family: Arial;"> 并且如同上一步一样修改ROOTDIR.</span>

6.复制 <span style="font-family: Arial;">$ERLDIR/bin/start_sasl.boot</span> 到  <span style="font-family: Arial;">bin/start.boot</span>.

7. <span style="font-family: Arial;">echo</span> <span style="font-family: Arial;">"5.7.5</span> <span style="font-family: Arial;">2.0"</span> <span style="font-family: Arial;">&gt;</span> <span style="font-family: Arial;">releases/start_erl.data</span>.

6.执行bin文件里的erl

release_handler:create_RELEASES(“$ROOTDIR”, “$ROOTDIR/releases/”, “$ROOTDIR/releases/nextim-2.rel”, []).

 

7.再把自己的项目文件复制到lib中  然后启动时 -pa参数是 lib文件夹. 完成这一步，就能独立出erlang环境了。

以上内容 参考自

http://spawnlink.com/articles/an-introduction-to-releases-with-erlybank/

http://streamhacker.com/2009/07/02/how-to-create-an-erlang-first-target-system/

数据类型 DATA TYPES

global_state()

The global state of the scanner, represented by the #xmerl_scanner{} record.

option_list()

Options allow to customize the behaviour of the scanner. 参考：tutorial on customization functions.
Possible options are:

{acc_fun, Fun}

Call back function to accumulate contents of entity.

{continuation_fun, Fun} | {continuation_fun, Fun, ContinuationState}

Call back function to decide what to do if the scanner runs into EOF before the document is complete.

{event_fun, Fun} | {event_fun, Fun, EventState}

Call back function to handle scanner events.

{fetch_fun, Fun} | {fetch_fun, Fun, FetchState}

Call back function to fetch an external resource.

{hook_fun, Fun} | {hook_fun, Fun, HookState}

Call back function to process the document entities once identified.

{close_fun, Fun}

Called when document has been completely parsed.

{rules, ReadFun, WriteFun, RulesState} | {rules, Rules}

Handles storing of scanner information when parsing.

{user_state, UserState}

Global state variable accessible from all customization functions

{fetch_path, PathList}

PathList is a list of directories to search when fetching files. If the file in question is not in the fetch_path, the URI will be used as a file name.

{space, Flag}

'preserve' (default) to preserve spaces, 'normalize' to accumulate consecutive whitespace and replace it with one space.

{line, Line}

To specify starting line for scanning in document which contains fragments of XML.

{namespace_conformant, Flag}

Controls whether to behave as a namespace conformant XML parser, 'false' (default) to not otherwise 'true'.

{validation, Flag}

Controls whether to process as a validating XML parser: 'off' (default) no validation, or validation 'dtd' by DTD or 'schema' by XML Schema. 'false' and 'true' options are obsolete (i.e. they may be removed in a future release), if used 'false' equals 'off' and 'true' equals 'dtd'.

{schemaLocation, [{Namespace,Link}|...]}

Tells explicitly which XML Schema documents to use to validate the XML document. Used together with the {validation,schema} option.

{quiet, Flag}

Set to 'true' if xmerl should behave quietly and not output any information to standard output (default 'false').

{doctype_DTD, DTD}

Allows to specify DTD name when it isn't available in the XML document. This option has effect only together with {validation,'dtd' option.

{xmlbase, Dir}

XML Base directory. If using string/1 default is current directory. If using file/1 default is directory of given file.

{encoding, Enc}

Set default character set used (default UTF-8). This character set is used only if not explicitly given by the XML declaration.

导出函数 EXPORTS

application

Generic OTP application functions

• Options =  [Option]
• &nbsp;Option = noexec | load | netload |  &lt;compiler option&gt;