ソフトウェアエンジニアの技術ブログ：Software engineer tech blog

mainnet=1               # mainnetを利用する
txindex=1               # indexを作成して全てのトランザクションIDを参照可能にする
server=1                # JSON RPCサーバとしてコマンドを受け付ける
rest=1                  # REST インターフェースを有効にする
rpcuser= "Username"     # JSON RPCのためのユーザ名
rpcpassword= "Password" # JSON RPCのためのパスワード
rpcport=8332            # JSON RPC用ポート番号

gen-bitcoin-conf.sh

export LC_ALL=C
TOPDIR=${TOPDIR:-$(git rev-parse --show-toplevel)}
BUILDDIR=${BUILDDIR:-$TOPDIR}
BINDIR=${BINDIR:-$BUILDDIR/src}
BITCOIND=${BITCOIND:-$BINDIR/bitcoind}
SHARE_EXAMPLES_DIR=${SHARE_EXAMPLES_DIR:-$TOPDIR/share/examples}
EXAMPLE_CONF_FILE=${EXAMPLE_CONF_FILE:-$SHARE_EXAMPLES_DIR/bitcoin.conf}

[ ! -x "$BITCOIND" ] && echo "$BITCOIND not found or not executable." && exit 1

DIRTY=""
VERSION_OUTPUT=$($BITCOIND --version)
if [[ $VERSION_OUTPUT == *"dirty"* ]]; then
  DIRTY="${DIRTY}${BITCOIND}\n"
fi

if [ -n "$DIRTY" ]
then
  echo -e "WARNING: $BITCOIND was built from a dirty tree.\n"
  echo -e "To safely generate a bitcoin.conf file, please commit your changes to $BITCOIND, rebuild, then run this script again.\n"
fi

echo 'Generating example bitcoin.conf file in share/examples/'

# create the directory, if it doesn't exist
mkdir -p "${SHARE_EXAMPLES_DIR}"

# create the header text
cat > "${EXAMPLE_CONF_FILE}" << 'EOF'
##
## bitcoin.conf configuration file.
## Generated by contrib/devtools/gen-bitcoin-conf.sh.
##
## Lines beginning with # are comments.
## All possible configuration options are provided. To use, copy this file
## to your data directory (default or specified by -datadir), uncomment
## options you would like to change, and save the file.
##


### Options
EOF

# parse the output from bitcoind --help
# adding newlines is a bit funky to ensure portability for BSD
# see here for more details: https://stackoverflow.com/a/24575385
${BITCOIND} --help \
    | sed '1,/Print this help message and exit/d' \
    | sed -E 's/^[[:space:]]{2}\-/#/' \
    | sed -E 's/^[[:space:]]{7}/# /' \
    | sed -E '/[=[:space:]]/!s/#.*$/&=1/' \
    | awk '/^#[a-z]/{x=$0;next}{if (NF==0) print x"\n",x="";else print}' \
    | sed 's,\(^[[:upper:]].*\)\:$,\
### \1,' \
    | sed 's/[[:space:]]*$//' >> "${EXAMPLE_CONF_FILE}"

# create the footer text
cat >> "${EXAMPLE_CONF_FILE}" << 'EOF'

# [Sections]
# Most options will apply to all networks. To confine an option to a specific
# network, add it under the relevant section below.
#
# Note: If not specified under a network section, the options addnode, connect,
# port, bind, rpcport, rpcbind, and wallet will only apply to mainnet.

# Options for mainnet
[main]

# Options for testnet
[test]

# Options for signet
[signet]

# Options for regtest
[regtest]
EOF

sedの使い方

1.rakus rakus
2.rakus

$ sed -e ‘s/rakus/RAKUS/g’ sample.tx
1.RAKUS RAKUS
2.RAKUS

-Eのところは複数指定にしている？

${BITCOIND} --help \
    | sed '1,/Print this help message and exit/d' \
    | sed -E 's/^[[:space:]]{2}\-/#/' \
    | sed -E 's/^[[:space:]]{7}/# /' \
    | sed -E '/[=[:space:]]/!s/#.*$/&=1/' \
    | awk '/^#[a-z]/{x=$0;next}{if (NF==0) print x"\n",x="";else print}' \
    | sed 's,\(^[[:upper:]].*\)\:$,\
### \1,' \
    | sed 's/[[:space:]]*$//' >> "${EXAMPLE_CONF_FILE}"

あるファイルを require したときにその結果が空のオブジェクトとして返される問題
module.exports first, lazy require, dependency injectionなどの解決方法がある

import sys
import re

MAPPING = {
    'core_read.cpp': 'core_io.cpp',
    'core_write.cpp': 'core_io.cpp',
}

# Directories with header-based modules, where the assumption that .cpp files
# define functions and variables declared in corresponding .h files is
# incorrect.
HEADER_MODULE_PATHS = [
    'interfaces/'
]

def module_name(path):
    if path in MAPPING:
        path = MAPPING[path]
    if any(path.startswith(dirpath) for dirpath in HEADER_MODULE_PATHS):
        return path
    if path.endswith(".h"):
        return path[:-2]
    if path.endswith(".c"):
        return path[:-2]
    if path.endswith(".cpp"):
        return path[:-4]
    return None

files = dict()
deps: dict[str, set[str]] = dict()

RE = re.compile("^#include <(.*)>")

# Iterate over files, and create list of modules
for arg in sys.argv[1:]:
    module = module_name(arg)
    if module is None:
        print("Ignoring file %s (does not constitute module)\n" % arg)
    else:
        files[arg] = module
        deps[module] = set()

# Iterate again, and build list of direct dependencies for each module
# TODO: implement support for multiple include directories
for arg in sorted(files.keys()):
    module = files[arg]
    with open(arg, 'r', encoding="utf8") as f:
        for line in f:
            match = RE.match(line)
            if match:
                include = match.group(1)
                included_module = module_name(include)
                if included_module is not None and included_module in deps and included_module != module:
                    deps[module].add(included_module)

# Loop to find the shortest (remaining) circular dependency
have_cycle: bool = False
while True:
    shortest_cycle = None
    for module in sorted(deps.keys()):
        # Build the transitive closure of dependencies of module
        closure: dict[str, list[str]] = dict()
        for dep in deps[module]:
            closure[dep] = []
        while True:
            old_size = len(closure)
            old_closure_keys = sorted(closure.keys())
            for src in old_closure_keys:
                for dep in deps[src]:
                    if dep not in closure:
                        closure[dep] = closure[src] + [src]
            if len(closure) == old_size:
                break
        # If module is in its own transitive closure, it's a circular dependency; check if it is the shortest
        if module in closure and (shortest_cycle is None or len(closure[module]) + 1 < len(shortest_cycle)):
            shortest_cycle = [module] + closure[module]
    if shortest_cycle is None:
        break
    # We have the shortest circular dependency; report it
    module = shortest_cycle[0]
    print("Circular dependency: %s" % (" -> ".join(shortest_cycle + [module])))
    # And then break the dependency to avoid repeating in other cycles
    deps[shortest_cycle[-1]] = deps[shortest_cycle[-1]] - set([module])
    have_cycle = True

sys.exit(1 if have_cycle else 0)