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bpkg-init
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executable file
·334 lines (292 loc) · 6.29 KB
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#!/bin/bash
## sets optional variable from environment
opt () { eval "if [ -z "\${$1}" ]; then ${1}='${2}'; fi"; }
## output usage
usage () {
echo ""
echo " usage: bpkg-init [-hV]"
echo ""
}
## prompt with question and store result in variable
prompt () {
local var="$1"
local q="$2"
local value=""
{
trap "exit -1" SIGINT SIGTERM
read -p "$q" -r -e value;
value="${value//\"/\'}";
} 2>&1
if [ ! -z "${value}" ]; then
eval "${var}"=\"${value}\"
fi
}
prompt_if () {
local mesg="$1"
local func="$2"
prompt ANSWER "$mesg [y/n]: "
case "$ANSWER" in
y|Y|yes|YES|Yes)
shift
shift
$func $@
return 0
esac
return 1
}
## alert user of hint
hint () {
{
echo
printf " hint: %s\n" "$@"
echo
} >&2
}
## output error
error () {
{
printf "error: %s\n" "${@}"
} >&2
}
## append line to buffer
append () {
appendf '%s' "${@}"
buf+=$'\n'
}
## append formatted string to buffer
appendf () {
local fmt="$1"
shift
buf+="$(printf "${fmt}" "${@}")"
}
## wraps each argument in quotes
wrap () {
printf '"%s" ' "${@}";
echo "";
}
intro () {
echo
echo "This will walk you through initializing the bpkg \`package.json' file."
echo "It will prompt you for the bare minimum that is needed and provide"
echo "defaults."
echo
echo "See github.com/sergeyget/bpkg_advanced for more information on defining the bpkg"
echo "\`package.json' file."
echo
echo "You can press ^C anytime to quit this prompt. The \`package.json' file"
echo "will only be written upon completion."
echo
}
options () {
opt NAME "$(basename $(pwd))"
opt VERSION "0.0.1"
opt DESCRIPTION ""
opt GLOBAL ""
opt INSTALL "install -b ${NAME}.sh \${PREFIX:-/usr/local}/bin/${NAME}"
opt SCRIPTS "${NAME}.sh"
}
set_global () {
GLOBAL=1
}
prompts () {
prompt NAME "name: (${NAME}) "
prompt VERSION "version: (${VERSION}) "
prompt DESCRIPTION "description: "
prompt INSTALL "install: (${INSTALL})"
prompt SCRIPTS "scripts: (${SCRIPTS}) "
prompt USER "Github username: (${USER}) "
prompt_if "Force global install?" set_global
}
## handle required fields
required () {
for key in \
"NAME" \
"SCRIPTS"
do
eval local val="\${${key}}"
[ -z "${val}" ] && error "Missing \`
${key}' property"
done
}
## convert scripts to quoted csv
csv () {
if [ ! -z "${SCRIPTS}" ]; then
RAW_SCRIPTS=${SCRIPTS}
{
local TMP=""
SCRIPTS="${SCRIPTS//,/ }"
SCRIPTS="${SCRIPTS//\"/}"
SCRIPTS="${SCRIPTS//\'/}"
SCRIPTS=($(wrap ${SCRIPTS}))
let len=${#SCRIPTS[@]}
for (( i = 0; i < len; i++ )); do
word=${SCRIPTS[$i]}
if (( i + 1 != len )); then
TMP+="${word}, "
else
TMP+="${word}"
fi
done
SCRIPTS="${TMP}"
}
fi
}
## delimit object and key-value pairs
delimit () {
append "{"
for key in \
"NAME" \
"VERSION" \
"DESCRIPTION" \
"GLOBAL" \
"INSTALL" \
"SCRIPTS"
do
local lowercase="$(echo ${key} | tr '[:upper:]' '[:lower:]')"
eval local val="\${${key}}"
if [ ! -z "${val}" ]; then
## swap leading/trailing quotes for brackets in arrays
local before="\""
local after="\""
[ "$key" == "SCRIPTS" ] && before="[ " && after=" ]"
appendf " \"${lowercase}\": ${before}%s${after}" "${val}"
append ","
fi
done
## remove final trailing newline and comma
buf="${buf%?}"
buf="${buf%?}"
append ""
append "}"
}
## validate completed contents with user
validate () {
prompt ANSWER "${buf} Does this look OK? (type 'n' to cancel) "
if [ "n" = "${ANSWER:0:1}" ]; then
exit 1
fi
}
## if package file already exists, ensure user wants to clobber
clobber () {
if test -f "${file}"; then
prompt_if "A \`package.json' already exists. Would you like to replace it?" rm -f "${file}"
fi
}
create_shell_file () {
if [ "${NAME}.sh" == "${RAW_SCRIPTS}" ] && [ ! -f "${NAME}.sh" ]; then
{
echo "#!/bin/bash"
echo
echo "VERSION=$VERSION"
echo
echo "usage () {"
echo " echo \"$NAME [-hV]\""
echo " echo"
echo " echo \"Options:\""
echo " echo \" -h|--help Print this help dialogue and exit\""
echo " echo \" -V|--version Print the current version and exit\""
echo '}'
echo
echo "${NAME} () {"
echo " for opt in \"\${@}\"; do"
echo " case \"\$opt\" in"
echo " -h|--help)"
echo " usage"
echo " return 0"
echo " ;;"
echo " -V|--version)"
echo " echo \"\$VERSION\""
echo " return 0"
echo " ;;"
echo " esac"
echo " done"
echo
echo " ## your code here"
echo "}"
echo
echo 'if [[ ${BASH_SOURCE[0]} != $0 ]]; then'
echo " export -f $NAME"
echo 'else'
echo " $NAME "'"${@}"'
echo ' exit $?'
echo 'fi'
} > "${NAME}.sh"
chmod 755 "${NAME}.sh"
fi
}
create_readme () {
if [ ! -f "README.md" ]; then
{
echo "# $NAME"
echo
echo "$DESCRIPTION"
echo
echo "# Install"
echo
echo "Available as a [bpkg](http://www.bpkg.sh/)"
echo '```sh'
echo "bpkg install [-g] ${USER:-bpkg}/$NAME"
echo '```'
} > "README.md"
fi
}
create_repo () {
if git status &>/dev/null; then
echo "Repo already exists"
else
git init
fi
}
## main
bpkg_init () {
local version="0.0.1"
local cwd="$(pwd)"
local buf="" ## output buffer
local file="${cwd}/package.json" ## output file
local arg="$1"
shift
case "${arg}" in
## flags
-V|--version)
echo "${version}"
exit 0
;;
-h|--help)
usage
exit 0
;;
*)
if [ ! -z "${arg}" ]; then
error "Unknown option: \`${arg}'"
usage
exit 1
fi
;;
esac
## set up package file
intro
options
prompts
required
csv
delimit
validate
clobber
## create and write package file
touch "${file}"
echo "${buf}" > "${file}"
create_shell_file
create_readme
# initialize a git repo if one does not exist
if [ ! -d '.git' ]; then
git init
fi
return 0
}
## export or run
if [[ ${BASH_SOURCE[0]} != $0 ]]; then
export -f bpkg-init
else
bpkg_init "${@}"
exit $?
fi