当前版本的EOS.IO还处于2.0，3.0仍然处于测试阶段。 鉴于目前按照官方wiki推荐是Dawn 2.0，那就暂时还是以2.0作为基础。
编译环境
获取代码
获取EOS.IO的全部代码很简单:
$ git clone https://github.com/eosio/eos --recursive
--recursive在这里的作用简单是同时吧所有的submodule也clone下来。
编译
看一下编译脚本：
这个地方我要批评一下EOS团队，Wiki里的脚本名称还是老的“build.sh”，而现在已经是“eosio-build.sh”了，这种地方其实是阻碍小白入门的，还需要团队的注意。
用法很简单，有两个参数可以选择，一个是构架，可以选ubuntu或者是darwin，还有一个是编译模式，完全安装依赖包编译和只编译EOS，如果第二个参数不加是完全编译。
$ ./build.sh ${architecture} ${optional_mode}
看一下里面的主要代码命令：
$ cmake -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_CXX_COMPILER=${CXX_COMPILER} -DCMAKE_C_COMPILER=${C_COMPILER} -DWASM_LLVM_CONFIG=${WASM_LLVM_CONFIG} -DBINARYEN_BIN=${BINARYEN_BIN} -DOPENSSL_ROOT_DIR=${OPENSSL_ROOT_DIR} -DOPENSSL_LIBRARIES=${OPENSSL_LIBRARIES} .. make -j4
很基础的cmake指令编译C++工程。
接下来我们来跑一下：
./eosio-build.sh darwin
因为选择了完全编译，所以需要点时间，大概也就30多分钟，可以泡杯茶或者做杯咖啡。
EOS的依赖包有：
- Clang 4.0.0
- CMake 3.5.1
- Boost 1.64
- OpenSSL
- LLVM 4.0
- secp256k1-zkp (Cryptonomex branch)
- binaryen
Docker
熟悉后端的朋友应该比较了解Docker了，对于不了解的朋友，你可以简单的把Docker理解成一个虚拟机，只是这个虚拟机的目的是把你所需要的软件运行环境打包，方便其他人可以一模一样的完整复制你当前的运行环境，从而解决了环境设置这个软件开发中的大问题。
Docker的下载你可以从这里得到
接下去，你需要的是编译eos的docker镜像
$ git clone https://github.com/EOSIO/eos.git --recursive
$ cd eos/Docker
$ docker build . -t eosio/eos
这里的第一步其实你之前编译里面做过了就不用再做了，因为不过是重新clone的git上的eos repo。
好了，这里你可以再去泡杯茶或者做杯咖啡，因为还要30多分钟。
在等待的时候，你需要看看我其他的一篇文章，介绍eos中编译好的一些程序和用到的一些工具。
. . . . .
经过了漫长的等待之后，你会发现，出错了！
卧槽，出错了
是的，你没看错，确实是会提示你编译错误。
是不是很绝望， 是不是想放弃， 是不是觉得他们team是SB？
没错，我也是这么认为的，因为issue里这个问题好像问的人蛮多的了，结果就是不修复，我也是服气的。
既然如此，那就先暂时跳过Docker，之后再来看。
创建并启动一个单节点的测试网络
这里我真的又想批评EOS团队了，Wiki能不能好好更新一下。
简单来说，就是前面在你编译完成之后，在eos文件夹下面会出现一个build文件夹，进一步讲，你去build/programs/eosd目录下面尝试执行eosiod程序，./eosiod,然后，你会看到错误信息：
olddonkeydeMacBook-Pro:eosiod olddonkey$ ./eosiod
1773574ms thread-0 chain_plugin.cpp:96 plugin_initialize ] initializing chain plugin
1773574ms thread-0 http_plugin.cpp:141 plugin_initialize ] host: 127.0.0.1 port: 8888
1773575ms thread-0 http_plugin.cpp:144 plugin_initialize ] configured http to listen on 127.0.0.1:8888
1773575ms thread-0 net_plugin.cpp:2425 plugin_initialize ] Initialize net plugin
1773575ms thread-0 net_plugin.cpp:2445 plugin_initialize ] Setting net_plugin logging level to info
1773575ms thread-0 net_plugin.cpp:2471 plugin_initialize ] host: 0.0.0.0 port: 9876
1773576ms thread-0 net_plugin.cpp:2547 plugin_initialize ] my node_id is 1cabd93a155df081bd4de63523de8cb3b28d877635024e7c7eac43885e40e001
1773576ms thread-0 main.cpp:85 main ] eosiod version df878838
1773576ms thread-0 main.cpp:89 main ] 10 assert_exception: Assert Exception
fc::exists( my->genesis_file ): unable to find genesis file '', check --genesis-json argument
{"f":""}
thread-0 chain_plugin.cpp:176 plugin_startup
{"my->genesis_file.generic_string()":""}
thread-0 chain_plugin.cpp:197 plugin_startup
Segmentation fault: 11
别怕，这个是正常的，也是我们所需要的。
现在你的eosiod文件夹下面就应该有一个data-dir文件夹，其中有一个配置文件config.ini，打开并配置它。
这里又有个坑，按照项目的Wiki，需要添加的配置是
# Load the testnet genesis state, which creates some initial block producers with the default key
genesis-json = /path/to/eos/source/genesis.json
# Enable production on a stale chain, since a single-node test chain is pretty much always stale
enable-stale-production = true
# Enable block production with the testnet producers
producer-name = inita
producer-name = initb
producer-name = initc
producer-name = initd
producer-name = inite
producer-name = initf
producer-name = initg
producer-name = inith
producer-name = initi
producer-name = initj
producer-name = initk
producer-name = initl
producer-name = initm
producer-name = initn
producer-name = inito
producer-name = initp
producer-name = initq
producer-name = initr
producer-name = inits
producer-name = initt
producer-name = initu
# Load the block producer plugin, so you can produce blocks
plugin = eosio::producer_plugin
# Wallet plugin
plugin = eosio::wallet_api_plugin
# As well as API and HTTP plugins
plugin = eosio::chain_api_plugin
plugin = eosio::http_plugin
但是这里的文件显然是老的格式的，如果需要添加新的格式的话
# Load the testnet genesis state, which creates some initial block producers with the default key
genesis-json = 这里换成项目根目录下的genesis.json文件的路径
# Enable block production with the testnet producers
producer-name = inita
producer-name = initb
producer-name = initc
producer-name = initd
producer-name = inite
producer-name = initf
producer-name = initg
producer-name = inith
producer-name = initi
producer-name = initj
producer-name = initk
producer-name = initl
producer-name = initm
producer-name = initn
producer-name = inito
producer-name = initp
producer-name = initq
producer-name = initr
producer-name = inits
producer-name = initt
producer-name = initu
# Load the block producer plugin, so you can produce blocks
plugin = eosio::producer_plugin
# Wallet plugin
plugin = eosio::wallet_api_plugin
# As well as API and HTTP plugins
plugin = eosio::chain_api_plugin
plugin = eosio::http_plugin
好了，然后，再次运行eosiod，如果没啥意外的话你就可以看到eosio deamon跑起来了。
olddonkeydeMacBook-Pro:eosiod olddonkey$ ./eosiod
587632ms thread-0 chain_plugin.cpp:96 plugin_initialize ] initializing chain plugin
587635ms thread-0 wallet_plugin.cpp:35 plugin_initialize ] initializing wallet plugin
587635ms thread-0 http_plugin.cpp:141 plugin_initialize ] host: 127.0.0.1 port: 8888
587636ms thread-0 http_plugin.cpp:144 plugin_initialize ] configured http to listen on 127.0.0.1:8888
587637ms thread-0 net_plugin.cpp:2425 plugin_initialize ] Initialize net plugin
587637ms thread-0 net_plugin.cpp:2445 plugin_initialize ] Setting net_plugin logging level to info
587638ms thread-0 net_plugin.cpp:2471 plugin_initialize ] host: 0.0.0.0 port: 9876
587639ms thread-0 net_plugin.cpp:2547 plugin_initialize ] my node_id is 874db12c21ae5a8e74cb02d48f3bd63da85ee96f3ba102de56cfa10db15c778b
587641ms thread-0 main.cpp:85 main ] eosiod version df878838
587649ms thread-0 block_log.cpp:92 open ] Opening block log at /Users/olddonkey/Documents/EOS/eos/build/programs/eosiod/data-dir/blocks/blocks.log
587671ms thread-0 chain_plugin.cpp:188 plugin_startup ] starting chain in read/write mode
587671ms thread-0 chain_plugin.cpp:193 plugin_startup ] Blockchain started; head block is #0, genesis timestamp is 2017-03-30T12:00:00.000
587671ms thread-0 producer_plugin.cpp:152 plugin_startup ] producer plugin: plugin_startup() begin
587671ms thread-0 producer_plugin.cpp:157 plugin_startup ] Launching block production for 21 producers.
*******************************
* *
* ------ NEW CHAIN ------ *
* - Welcome to EOSIO! - *
* ----------------------- *
* *
*******************************
Your genesis seems to have an old timestamp
Please consider using the --genesis-timestamp option to give your genesis a recent timestamp
587672ms thread-0 producer_plugin.cpp:167 plugin_startup ] producer plugin: plugin_startup() end
587672ms thread-0 http_plugin.cpp:156 plugin_startup ] start processing http thread
587672ms thread-0 http_plugin.cpp:213 plugin_startup ] start listening for http requests
587674ms thread-0 http_plugin.cpp:218 plugin_startup ] http io service exit
587674ms thread-0 wallet_api_plugin.cpp:70 plugin_startup ] starting wallet_api_plugin
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/create
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/get_public_keys
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/import_key
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/list_keys
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/list_wallets
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/lock
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/lock_all
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/open
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/set_timeout
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/sign_transaction
587675ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/wallet/unlock
587675ms thread-0 chain_api_plugin.cpp:62 plugin_startup ] starting chain_api_plugin
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/abi_bin_to_json
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/abi_json_to_bin
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/get_account
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/get_block
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/get_code
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/get_currency_balance
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/get_currency_stats
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/get_info
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/get_required_keys
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/get_table_rows
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/push_block
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/push_transaction
587676ms thread-0 http_plugin.cpp:242 add_handler ] add api url: /v1/chain/push_transactions
587676ms thread-0 net_plugin.cpp:2559 plugin_startup ] starting listener, max clients is 25
588011ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
588500ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
589005ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
589501ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
590005ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
590503ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
591000ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
591500ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
592000ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
592505ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
593000ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
593500ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
594000ms thread-0 producer_plugin.cpp:227 block_production_loo ] Not producing block because it isn't my turn, its eosio
594505ms thread-0 producer_plugin.cpp:227 block_production_loo ]
可能出现的问题
- 如果遇到这样的错误
St9exception: content of memory does not match data expected by executable
请重启eosiod，使用
eosiod --resync
- 想知道现在用的是什么版本的eosiod?
eosc -H ${eosd_host} -p ${eosd_port} get info，然后可以在server_version部分看到当前连接的版本。
