Install shellcheck on Termux

shellcheck-install.sh

#!/bin/bash
#
# Install shellcheck

set -euo pipefail

# resynchronize the package index
apt-get -qq update

# install QEMU Linux user mode emulator (and jq)
apt-get -qqy install curl jq qemu-user-x86_64 wget

ARCHIVE_URL=$(curl -H 'Accept: application/vnd.github.v3+json' https://api.github.com/repos/koalaman/shellcheck/releases/latest 2>/dev/null | jq -r '.assets[] | select(.name | contains("linux.x86_64")) | .browser_download_url')
ARCHIVE_PATH=${ARCHIVE_URL##*/}

# create and enter temporary directory
tempdir=$(mktemp --directory --tmpdir shellcheck.XXXXXX)
cd "$tempdir"

# download archive
wget -q "$ARCHIVE_URL"

# extract binary from archive
tar xJf "$ARCHIVE_PATH" --no-anchored --strip-components=1 shellcheck

# install x86_64 binary
install -D -m 700 -t ~/.local/libexec/ ./shellcheck

# create laumcher script
cat <<EOF > launcher
#!/data/data/com.termux/files/usr/bin/sh
exec /data/data/com.termux/files/usr/bin/qemu-x86_64 /data/data/com.termux/files/home/.local/libexec/shellcheck "\$@"
EOF

# install launcher
install -D -m 700 -T ./launcher ~/.local/bin/shellcheck

cd $HOME
wget https://github.com/koalaman/shellcheck/releases/download/stable/shellcheck-stable.linux.aarch64.tar.xz
tar xvf shellcheck-stable.linux.aarch64.tar.xz
rm shellcheck-stable.linux.aarch64.tar.xz
cd shellcheck-stable
cp shellcheck $PREFIX/bin
echo 'alias shellcheck="proot -0 shellcheck"' >> $PREFIX/etc/bash.bashrc
echo 'alias vi="proot -0 vi"' >> $PREFIX/etc/bash.bashrc
rm -rf $HOME/shellcheck-stable
shellcheck