156 lines
5.4 KiB
Bash
156 lines
5.4 KiB
Bash
# Assert that FILE exists and is executable
|
||
#
|
||
# assertExecutable FILE
|
||
assertExecutable() {
|
||
local file="$1"
|
||
[[ -f "$file" && -x "$file" ]] || \
|
||
die "Cannot wrap '$file' because it is not an executable file"
|
||
}
|
||
|
||
# construct an executable file that wraps the actual executable
|
||
# makeWrapper EXECUTABLE OUT_PATH ARGS
|
||
|
||
# ARGS:
|
||
# --argv0 NAME : set name of executed process to NAME
|
||
# (otherwise it’s called …-wrapped)
|
||
# --set VAR VAL : add VAR with value VAL to the executable’s
|
||
# environment
|
||
# --set-default VAR VAL : like --set, but only adds VAR if not already set in
|
||
# the environment
|
||
# --unset VAR : remove VAR from the environment
|
||
# --run COMMAND : run command before the executable
|
||
# --add-flags FLAGS : add FLAGS to invocation of executable
|
||
|
||
# --prefix ENV SEP VAL : suffix/prefix ENV with VAL, separated by SEP
|
||
# --suffix
|
||
# --prefix-each ENV SEP VALS : like --prefix, but VALS is a list
|
||
# --suffix-each ENV SEP VALS : like --suffix, but VALS is a list
|
||
# --prefix-contents ENV SEP FILES : like --suffix-each, but contents of FILES
|
||
# are read first and used as VALS
|
||
# --suffix-contents
|
||
makeWrapper() {
|
||
local original="$1"
|
||
local wrapper="$2"
|
||
local params varName value command separator n fileNames
|
||
local argv0 flagsBefore flags
|
||
|
||
assertExecutable "$original"
|
||
|
||
mkdir -p "$(dirname "$wrapper")"
|
||
|
||
echo "#! @shell@ -e" > "$wrapper"
|
||
|
||
params=("$@")
|
||
for ((n = 2; n < ${#params[*]}; n += 1)); do
|
||
p="${params[$n]}"
|
||
|
||
if [[ "$p" == "--set" ]]; then
|
||
varName="${params[$((n + 1))]}"
|
||
value="${params[$((n + 2))]}"
|
||
n=$((n + 2))
|
||
echo "export $varName=${value@Q}" >> "$wrapper"
|
||
elif [[ "$p" == "--set-default" ]]; then
|
||
varName="${params[$((n + 1))]}"
|
||
value="${params[$((n + 2))]}"
|
||
n=$((n + 2))
|
||
echo "export $varName=\${$varName-${value@Q}}" >> "$wrapper"
|
||
elif [[ "$p" == "--unset" ]]; then
|
||
varName="${params[$((n + 1))]}"
|
||
n=$((n + 1))
|
||
echo "unset $varName" >> "$wrapper"
|
||
elif [[ "$p" == "--run" ]]; then
|
||
command="${params[$((n + 1))]}"
|
||
n=$((n + 1))
|
||
echo "$command" >> "$wrapper"
|
||
elif [[ ("$p" == "--suffix") || ("$p" == "--prefix") ]]; then
|
||
varName="${params[$((n + 1))]}"
|
||
separator="${params[$((n + 2))]}"
|
||
value="${params[$((n + 3))]}"
|
||
n=$((n + 3))
|
||
if test -n "$value"; then
|
||
if test "$p" = "--suffix"; then
|
||
echo "export $varName=\$$varName\${$varName:+${separator@Q}}${value@Q}" >> "$wrapper"
|
||
else
|
||
echo "export $varName=${value@Q}\${$varName:+${separator@Q}}\$$varName" >> "$wrapper"
|
||
fi
|
||
fi
|
||
elif [[ "$p" == "--prefix-each" ]]; then
|
||
varName="${params[$((n + 1))]}"
|
||
separator="${params[$((n + 2))]}"
|
||
values="${params[$((n + 3))]}"
|
||
n=$((n + 3))
|
||
for value in $values; do
|
||
echo "export $varName=${value@Q}\${$varName:+${separator@Q}}\$$varName" >> "$wrapper"
|
||
done
|
||
elif [[ "$p" == "--suffix-each" ]]; then
|
||
varName="${params[$((n + 1))]}"
|
||
separator="${params[$((n + 2))]}"
|
||
values="${params[$((n + 3))]}"
|
||
n=$((n + 3))
|
||
for value in $values; do
|
||
echo "export $varName=\$$varName\${$varName:+$separator}${value@Q}" >> "$wrapper"
|
||
done
|
||
elif [[ ("$p" == "--suffix-contents") || ("$p" == "--prefix-contents") ]]; then
|
||
varName="${params[$((n + 1))]}"
|
||
separator="${params[$((n + 2))]}"
|
||
fileNames="${params[$((n + 3))]}"
|
||
n=$((n + 3))
|
||
for fileName in $fileNames; do
|
||
contents="$(cat "$fileName")"
|
||
if test "$p" = "--suffix-contents"; then
|
||
echo "export $varName=\$$varName\${$varName:+$separator}${contents@Q}" >> "$wrapper"
|
||
else
|
||
echo "export $varName=${contents@Q}\${$varName:+$separator}\$$varName" >> "$wrapper"
|
||
fi
|
||
done
|
||
elif [[ "$p" == "--add-flags" ]]; then
|
||
flags="${params[$((n + 1))]}"
|
||
n=$((n + 1))
|
||
flagsBefore="$flagsBefore $flags"
|
||
elif [[ "$p" == "--argv0" ]]; then
|
||
argv0="${params[$((n + 1))]}"
|
||
n=$((n + 1))
|
||
else
|
||
die "makeWrapper doesn't understand the arg $p"
|
||
fi
|
||
done
|
||
|
||
echo exec ${argv0:+-a \"$argv0\"} \""$original"\" \
|
||
"$flagsBefore" '"$@"' >> "$wrapper"
|
||
|
||
chmod +x "$wrapper"
|
||
}
|
||
|
||
addSuffix() {
|
||
suffix="$1"
|
||
shift
|
||
for name in "$@"; do
|
||
echo "$name$suffix"
|
||
done
|
||
}
|
||
|
||
filterExisting() {
|
||
for fn in "$@"; do
|
||
if test -e "$fn"; then
|
||
echo "$fn"
|
||
fi
|
||
done
|
||
}
|
||
|
||
# Syntax: wrapProgram <PROGRAM> <MAKE-WRAPPER FLAGS...>
|
||
wrapProgram() {
|
||
local prog="$1"
|
||
local hidden
|
||
|
||
assertExecutable "$prog"
|
||
|
||
hidden="$(dirname "$prog")/.$(basename "$prog")"-wrapped
|
||
while [ -e "$hidden" ]; do
|
||
hidden="${hidden}_"
|
||
done
|
||
mv "$prog" "$hidden"
|
||
# Silence warning about unexpanded $0:
|
||
# shellcheck disable=SC2016
|
||
makeWrapper "$hidden" "$prog" --argv0 '$0' "${@:2}"
|
||
}
|