Substrate 入门 - 运行与调试 （二）

    cargo run --bin substrate -- --help  
    # 等价于 ./target/debug/substate -- --help

    cargo run --bin substrate  -- --dev -d .sub --execution=NativeElseWasm

    2019-12-02 21:34:38 Running in --dev mode, RPC CORS has been disabled.  
    2019-12-02 21:34:38 Substrate Node  
    2019-12-02 21:34:38   version 2.0.0-33476f08b-x86_64-linux-gnu  
    2019-12-02 21:34:38   by Parity Technologies, 2017-2019  
    2019-12-02 21:34:38 Chain specification: Development  
    2019-12-02 21:34:38 Node name: squealing-volcano-7235  
    2019-12-02 21:34:38 Roles: AUTHORITY  
    2019-12-02 21:34:41 Initializing Genesis block/state (state: 0xcfa1…1f33, header-hash: 0x7aed…4a2a)  
    2019-12-02 21:34:41 Loading GRANDPA authority set from genesis on what appears to be first startup.  
    2019-12-02 21:34:42 Loaded block-time = BabeConfiguration { slot_duration: 3000, epoch_length: 200, c: (1, 4), genesis_authorities: [(Public(d43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d (5GrwvaEF...)), 1)], randomness: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], secondary_slots: true } milliseconds from genesis on first-launch  
    2019-12-02 21:34:42 Creating empty BABE epoch changes on what appears to be first startup.  
    2019-12-02 21:34:43 Highest known block at #0  
    2019-12-02 21:34:43 Using default protocol ID "sup" because none is configured in the chain specs  
    2019-12-02 21:34:43 Local node identity is: QmPx8ErgDnK2yzcNzWWZfcpA5jG5BiqHnYhxj8uP78R1wP  
    2019-12-02 21:34:43 Starting BABE Authorship worker  
    2019-12-02 21:34:43 Grafana data source server started at 127.0.0.1:9955  
    2019-12-02 21:34:45 Starting consensus session on top of parent 0x7aed7beac8e270a7c1b94c388bf2dd458a583793eb1cf6cbdaac5c2b53bc4a2a  
    2019-12-02 21:34:47 Prepared block for proposing at 1 [hash: 0x9ef353fac64fb410da9dcddb413bc32605be0bddc37600f4308a8fe16c67cd48; parent_hash: 0x7aed…4a2a; extrinsics: [0xdd07…0f07]]  
    2019-12-02 21:34:47 Pre-sealed block for proposal at 1. Hash now 0x7092bd4729d239cc50ddea5ebca686956747d429ebc5fdd04437eb3d1b2c5144, previously 0x9ef353fac64fb410da9dcddb413bc32605be0bddc37600f4308a8fe16c67cd48.  
    2019-12-02 21:34:47 New epoch 0 launching at block 0x7092…5144 (block slot 525097895 >= start slot 525097895).  
    2019-12-02 21:34:47 Next epoch starts at slot 525098095  
    2019-12-02 21:34:47 Imported #1 (0x7092…5144)  
    2019-12-02 21:34:48 Idle (0 peers), best: #1 (0x7092…5144), finalized #0 (0x7aed…4a2a), ⬇ 0 ⬆ 0  
    2019-12-02 21:34:48 Starting consensus session on top of parent 0x7092bd4729d239cc50ddea5ebca686956747d429ebc5fdd04437eb3d1b2c5144  
    2019-12-02 21:34:48 Prepared block for proposing at 2 [hash: 0x401eaa5aad96fa270be3e8441e8f9b260496bc45594a314975be0a0e209bcd0c; parent_hash: 0x7092…5144; extrinsics: [0x147a…25aa]]  
    2019-12-02 21:34:48 Pre-sealed block for proposal at 2. Hash now 0x0c173a3e655a50bbc93998d15ab8adedac76bc751e9d8eea173132f51b8731eb, previously 0x401eaa5aad96fa270be3e8441e8f9b260496bc45594a314975be0a0e209bcd0c.  
    2019-12-02 21:34:48 Imported #2 (0x0c17…31eb)

    Starting consensus   # 共识准备  
     Pre-sealed block  for proposing at < 块高 >, 区块 hash, 父区块 hash, 该区块中的交易 hash # 预打包区块，其中的交易  
     Imported #< 块高 >  # 区块落盘，一定要看到这一条才表示区块出块流程正常进行

    Discarding proposal for slot {}; block production took too long

    # 请详细参见附近的注释，该常量用于控制出块时间间隔，因此当 took too long 的时候把出块时间加长  
    pub const MILLISECS_PER_BLOCK: Moment = 3000;

    info!(target: "babe",   "Creating empty BABE epoch changes on what appears to be first startup.");

    fn init_logger(pattern: &str) {    use ansi_term::Colour;    ...   if let Ok(lvl) = std::env::var("RUST_LOG") {        builder.parse_filters(&lvl);  // 这里，设置了日志 filter  
        }    ...}

    RUST_LOG=warn;babe=debug cargo run --bin substrate -- --dev -d .sub --execution-NativeElseWasm  
    # 或者  
    RUST_LOG=warn;babe=debug ./target/debug/substrate -- --dev -d .sub --execution-NativeElseWasm