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#!/usr/bin/env bash
# Copyright (c) 2021 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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
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