第十三號艦隊
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Introduction to biicode

Posted on Edited on In ,

前情提要

長久以來寫C/C++的Code時，配置環境是很麻煩的一件事，通常會遇到以下的事情

  • 下載第三方Library
  • 設定Include Path
  • 設定Linking library
  • Cross Platform的設置
  • Makefile的編寫

雖然有了CMake幫助解決塊平台的問題。不過還是不夠。有時我們想要Rust的Cargo或是Go Build這樣的東西，而Biicode給了我們一點光明。

而這邊就是將教學和Building C / C++ applications with biicode用自己的方式表達出來。

Create a project

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$ bii init myproject
$ cd myproject && ls
bii  blocks  deps

biicode幫我們產生了三個目錄
接著產生一個Hello World的Template

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$ bii new myuser/crypto --hello=cpp
$ bii cpp:build
INFO: Processing changes...
Running: cmake  -G "Unix Makefiles" -Wno-dev  ../cmake

		BLOCK: myuser/crypto 
-----------------------------------------------------------
+  LIB: myuser_crypto
+ EXE: myuser_crypto_main
-- Configuring done
-- Generating done
-- Build files have been written to: /home/hm/build/myproject/build
Building: cmake --build . 
Scanning dependencies of target myuser_crypto_main
[100%] Building CXX object myuser/crypto/CMakeFiles/myuser_crypto_main.dir/main.cpp.o
Linking CXX executable /home/hm/build/myproject/bin/myuser_crypto_main
[100%] Built target myuser_crypto_main

可以看到最後產生的Program放在bin/目錄底下，於是我們可以執行

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$ ./bin/myuser_crypto_main
Hello world!

到這邊沒什麼特別的，有趣的事情在後面

Dependency management

修改blocks/myuser/crypto/main.cp成如下，看Code我們可以猜到他需要Crypto++

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#include "cryptopp/cryptopp/sha.h"
#include "cryptopp/cryptopp/filters.h"
#include "cryptopp/cryptopp/hex.h"
#include <iostream>
#include <string>

int main() {
    CryptoPP::SHA1 sha1;
    std::string source = "Hello";  
    std::string hash = "";
    CryptoPP::StringSource(source, true, new CryptoPP::HashFilter(sha1,
                            new CryptoPP::HexEncoder(new CryptoPP::StringSink(hash))));
    std::cout << hash << std::endl;
}

接著重新Build一次

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$ bii cpp:build
INFO: Processing changes...
Running: cmake  -G "Unix Makefiles" -Wno-dev  ../cmake

		BLOCK: myuser/crypto 
-----------------------------------------------------------
+  LIB: myuser_crypto
+ EXE: myuser_crypto_main
-- Configuring done
-- Generating done
-- Build files have been written to: /home/hm/build/myproject/build
Building: cmake --build . 
Scanning dependencies of target myuser_crypto_main
[100%] Building CXX object myuser/crypto/CMakeFiles/myuser_crypto_main.dir/main.cpp.o
/home/hm/build/myproject/blocks/myuser/crypto/main.cpp:1:35: fatal error: cryptopp/cryptopp/sha.h: No such file or directory
 #include "cryptopp/cryptopp/sha.h"
                                   ^
compilation terminated.
make[2]: *** [myuser/crypto/CMakeFiles/myuser_crypto_main.dir/main.cpp.o] Error 1
make[1]: *** [myuser/crypto/CMakeFiles/myuser_crypto_main.dir/all] Error 2
make: *** [all] Error 2
ERROR: Build failed

正如所料，找不到對應的Header跟Library。此時我們可以使用

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$ bii find
INFO: Processing changes...
INFO: Finding missing dependencies in server
INFO: Looking for cryptopp/cryptopp...
INFO: >> Block candidate: cryptopp/cryptopp/cryptopp/master
....(略)
INFO: Analyzing compatibility for found dependencies... 
INFO: All dependencies resolved
Find resolved new dependencies:
	cryptopp/cryptopp: 8
INFO: Downloading files from: cryptopp/cryptopp
INFO: Saving files from: cryptopp/cryptopp

接著在一次編譯，就會得到我們想要的結果

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$ bii cpp:build
$ ./bin/myuser_crypto_main
F7FF9E8B7BB2E09B70935A5D785E0CC5D9D0ABF0

如果我們使用bii deps，可以到看我們需要的相依性

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INFO: Processing changes...
myuser/crypto depends on:
       cryptopp/cryptopp: 8
          filters.h
          hex.h
          sha.h
       system:
          iostream
          string

感想

雖然這看起來很酷，不過還是有幾點希望改進

  • Cross Compiler Toolchain
  • Android NDK and etc
  • More Library support
    真期待這東西更加成熟啊