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https://github.com/NixOS/nixpkgs.git
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Fix shellcheck warnings. Use single quotes for printf format strings. Switch to strncpy in concat3. Use multiline strings to print C functions. Switch from if/elif to case.
This commit is contained in:
Tobias Bergkvist
parent
b58c857bfb
commit
b62216a211
@ -26,132 +26,146 @@ makeBinaryWrapper() {
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# makeDocumentedCWrapper EXECUTABLE ARGS
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# ARGS: same as makeBinaryWrapper
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makeDocumentedCWrapper() {
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local src=$(makeCWrapper "$@")
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local docs=$(documentationString "$src")
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printf "%s\n" "$src"
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printf "\n%s\n" "$docs"
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local src docs
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src=$(makeCWrapper "$@")
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docs=$(documentationString "$src")
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printf '%s\n\n' "$src"
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printf '%s\n' "$docs"
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}
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# makeCWrapper EXECUTABLE ARGS
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# ARGS: same as makeBinaryWrapper
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makeCWrapper() {
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local argv0 n params cmd main flagsBefore flags
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local uses_prefix uses_suffix uses_concat3
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local executable=$(escapeStringLiteral "$1")
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local params=("$@")
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local argv0 n params cmd main flagsBefore flags executable params
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executable=$(escapeStringLiteral "$1")
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params=("$@")
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for ((n = 1; n < ${#params[*]}; n += 1)); do
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p="${params[$n]}"
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if [[ "$p" == "--set" ]]; then
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cmd=$(setEnv "${params[$((n + 1))]}" "${params[$((n + 2))]}")
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main="$main $cmd"$'\n'
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n=$((n + 2))
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elif [[ "$p" == "--set-default" ]]; then
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cmd=$(setDefaultEnv "${params[$((n + 1))]}" "${params[$((n + 2))]}")
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main="$main $cmd"$'\n'
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n=$((n + 2))
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elif [[ "$p" == "--unset" ]]; then
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cmd=$(unsetEnv "${params[$((n + 1))]}")
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main="$main $cmd"$'\n'
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n=$((n + 1))
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elif [[ "$p" == "--prefix" ]]; then
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cmd=$(setEnvPrefix "${params[$((n + 1))]}" "${params[$((n + 2))]}" "${params[$((n + 3))]}")
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main="$main $cmd"$'\n'
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uses_prefix=1
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uses_concat3=1
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n=$((n + 3))
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elif [[ "$p" == "--suffix" ]]; then
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cmd=$(setEnvSuffix "${params[$((n + 1))]}" "${params[$((n + 2))]}" "${params[$((n + 3))]}")
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main="$main $cmd"$'\n'
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uses_suffix=1
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uses_concat3=1
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n=$((n + 3))
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elif [[ "$p" == "--add-flags" ]]; then
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flags="${params[$((n + 1))]}"
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flagsBefore="$flagsBefore $flags"
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n=$((n + 1))
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elif [[ "$p" == "--argv0" ]]; then
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argv0=$(escapeStringLiteral "${params[$((n + 1))]}")
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n=$((n + 1))
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else
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# Using an error macro, we will make sure the compiler gives an understandable error message
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printf "%s\n" " #error makeCWrapper did not understand argument ${p}"
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fi
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p="${params[n]}"
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case $p in
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--set)
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cmd=$(setEnv "${params[n + 1]}" "${params[n + 2]}")
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main="$main $cmd"$'\n'
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n=$((n + 2))
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;;
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--set-default)
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cmd=$(setDefaultEnv "${params[n + 1]}" "${params[n + 2]}")
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main="$main $cmd"$'\n'
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n=$((n + 2))
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;;
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--unset)
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cmd=$(unsetEnv "${params[n + 1]}")
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main="$main $cmd"$'\n'
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n=$((n + 1))
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;;
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--prefix)
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cmd=$(setEnvPrefix "${params[n + 1]}" "${params[n + 2]}" "${params[n + 3]}")
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main="$main $cmd"$'\n'
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uses_prefix=1
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uses_concat3=1
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n=$((n + 3))
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;;
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--suffix)
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cmd=$(setEnvSuffix "${params[n + 1]}" "${params[n + 2]}" "${params[n + 3]}")
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main="$main $cmd"$'\n'
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uses_suffix=1
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uses_concat3=1
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n=$((n + 3))
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;;
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--add-flags)
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flags="${params[n + 1]}"
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flagsBefore="$flagsBefore $flags"
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n=$((n + 1))
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;;
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--argv0)
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argv0=$(escapeStringLiteral "${params[n + 1]}")
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n=$((n + 1))
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;;
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*) # Using an error macro, we will make sure the compiler gives an understandable error message
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printf '%s\n' " #error makeCWrapper did not understand argument ${p}"
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;;
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esac
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done
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# shellcheck disable=SC2086
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[ -z "$flagsBefore" ] || main="$main"${main:+$'\n'}$(addFlags $flagsBefore)$'\n'$'\n'
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main="$main argv[0] = \"${argv0:-${executable}}\";"$'\n'
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main="$main return execv(\"${executable}\", argv);"$'\n'
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printf "%s\n" "#include <unistd.h>"
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printf "%s\n" "#include <stdlib.h>"
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[ -z "$uses_concat3" ] || printf "%s\n" "#include <string.h>"
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[ -z "$uses_concat3" ] || printf "\n%s\n" "$(concat3Fn)"
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[ -z "$uses_prefix" ] || printf "\n%s\n" "$(setEnvPrefixFn)"
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[ -z "$uses_suffix" ] || printf "\n%s\n" "$(setEnvSuffixFn)"
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printf "\n%s" "int main(int argc, char **argv) {"
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printf "\n%s" "$main"
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printf "%s\n" "}"
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printf '%s\n' "#include <unistd.h>"
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printf '%s\n' "#include <stdlib.h>"
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[ -z "$uses_concat3" ] || printf '%s\n' "#include <string.h>"
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[ -z "$uses_concat3" ] || printf '\n%s\n' "$(concat3Fn)"
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[ -z "$uses_prefix" ] || printf '\n%s\n' "$(setEnvPrefixFn)"
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[ -z "$uses_suffix" ] || printf '\n%s\n' "$(setEnvSuffixFn)"
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printf '\n%s' "int main(int argc, char **argv) {"
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printf '\n%s' "$main"
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printf '%s\n' "}"
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}
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addFlags() {
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local result n flag flags
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local var="argv_tmp"
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local result n flag flags var
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var="argv_tmp"
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flags=("$@")
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for ((n = 0; n < ${#flags[*]}; n += 1)); do
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flag=$(escapeStringLiteral "${flags[$n]}")
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result="$result $var[$((n+1))] = \"$flag\";"$'\n'
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result="$result ${var}[$((n+1))] = \"$flag\";"$'\n'
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done
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printf " %s\n" "char **$var = malloc(sizeof(*$var) * ($((n+1)) + argc));"
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printf " %s\n" "$var[0] = argv[0];"
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printf "%s" "$result"
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printf " %s\n" "for (int i = 1; i < argc; ++i) {"
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printf " %s\n" " $var[$n + i] = argv[i];"
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printf " %s\n" "}"
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printf " %s\n" "$var[$n + argc] = NULL;"
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printf " %s\n" "argv = $var;"
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printf ' %s\n' "char **$var = malloc(sizeof(*$var) * ($((n+1)) + argc));"
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printf ' %s\n' "${var}[0] = argv[0];"
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printf '%s' "$result"
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printf ' %s\n' "for (int i = 1; i < argc; ++i) {"
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printf ' %s\n' " ${var}[$n + i] = argv[i];"
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printf ' %s\n' "}"
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printf ' %s\n' "${var}[$n + argc] = NULL;"
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printf ' %s\n' "argv = $var;"
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}
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# prefix ENV SEP VAL
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setEnvPrefix() {
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local env=$(escapeStringLiteral "$1")
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local sep=$(escapeStringLiteral "$2")
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local val=$(escapeStringLiteral "$3")
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printf "%s" "set_env_prefix(\"$env\", \"$sep\", \"$val\");"
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local env sep val
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env=$(escapeStringLiteral "$1")
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sep=$(escapeStringLiteral "$2")
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val=$(escapeStringLiteral "$3")
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printf '%s' "set_env_prefix(\"$env\", \"$sep\", \"$val\");"
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}
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# suffix ENV SEP VAL
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setEnvSuffix() {
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local env=$(escapeStringLiteral "$1")
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local sep=$(escapeStringLiteral "$2")
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local val=$(escapeStringLiteral "$3")
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printf "%s" "set_env_suffix(\"$env\", \"$sep\", \"$val\");"
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local env sep val
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env=$(escapeStringLiteral "$1")
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sep=$(escapeStringLiteral "$2")
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val=$(escapeStringLiteral "$3")
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printf '%s' "set_env_suffix(\"$env\", \"$sep\", \"$val\");"
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}
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# setEnv KEY VALUE
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setEnv() {
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local key=$(escapeStringLiteral "$1")
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local value=$(escapeStringLiteral "$2")
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printf "%s" "putenv(\"$key=$value\");"
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local key value
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key=$(escapeStringLiteral "$1")
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value=$(escapeStringLiteral "$2")
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printf '%s' "putenv(\"$key=$value\");"
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}
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# setDefaultEnv KEY VALUE
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setDefaultEnv() {
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local key=$(escapeStringLiteral "$1")
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local value=$(escapeStringLiteral "$2")
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printf "%s" "setenv(\"$key\", \"$value\", 0);"
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local key value
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key=$(escapeStringLiteral "$1")
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value=$(escapeStringLiteral "$2")
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printf '%s' "setenv(\"$key\", \"$value\", 0);"
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}
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# unsetEnv KEY
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unsetEnv() {
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local key=$(escapeStringLiteral "$1")
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printf "%s" "unsetenv(\"$key\");"
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local key
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key=$(escapeStringLiteral "$1")
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printf '%s' "unsetenv(\"$key\");"
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}
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# Put the entire source code into const char* SOURCE_CODE to make it readable after compilation.
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# documentationString SOURCE_CODE
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documentationString() {
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local docs=$(escapeStringLiteral $'\n----------\n// This binary wrapper was compiled from the following generated C-code:\n'"$1"$'\n----------\n')
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printf "%s" "const char * SOURCE_CODE = \"$docs\";"
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local docs
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docs=$(escapeStringLiteral $'\n----------\n// This binary wrapper was compiled from the following generated C-code:\n'"$1"$'\n----------\n')
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printf '%s' "const char * SOURCE_CODE = \"$docs\";"
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}
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# Makes it safe to insert STRING within quotes in a C String Literal.
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@ -162,37 +176,43 @@ escapeStringLiteral() {
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result=${result//\"/'\"'}
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result=${result//$'\n'/"\n"}
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result=${result//$'\r'/"\r"}
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printf "%s" "$result"
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printf '%s' "$result"
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}
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concat3Fn() {
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printf "%s\n" 'char *concat3(char *x, char *y, char *z) {'
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printf "%s\n" ' int xn = strlen(x);'
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printf "%s\n" ' int yn = strlen(y);'
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printf "%s\n" ' int zn = strlen(z);'
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printf "%s\n" ' char *res = malloc(sizeof(*res)*(xn + yn + zn + 1));'
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printf "%s\n" ' for (int i = 0; i < xn; ++i) res[i] = x[i];'
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printf "%s\n" ' for (int i = 0; i < yn; ++i) res[xn+i] = y[i];'
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printf "%s\n" ' for (int i = 0; i < zn; ++i) res[xn+yn+i] = z[i];'
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printf "%s\n" " res[xn+yn+zn] = '\0';"
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printf "%s\n" ' return res;'
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printf "%s\n" '}'
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printf '%s' "\
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char *concat3(char *x, char *y, char *z) {
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int xn = strlen(x);
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int yn = strlen(y);
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int zn = strlen(z);
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char *res = malloc(sizeof(*res)*(xn + yn + zn + 1));
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strncpy(res, x, xn);
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strncpy(res + xn, y, yn);
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strncpy(res + xn + yn, z, zn);
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res[xn + yn + zn] = '\0';
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return res;
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}
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"
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}
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setEnvPrefixFn() {
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printf "%s\n" 'void set_env_prefix(char *env, char *sep, char *val) {'
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printf "%s\n" ' char *existing = getenv(env);'
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printf "%s\n" ' if (existing) val = concat3(val, sep, existing);'
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printf "%s\n" ' setenv(env, val, 1);'
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printf "%s\n" ' if (existing) free(val);'
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printf "%s\n" '}'
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printf '%s' "\
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void set_env_prefix(char *env, char *sep, char *val) {
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char *existing = getenv(env);
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if (existing) val = concat3(val, sep, existing);
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setenv(env, val, 1);
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if (existing) free(val);
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}
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"
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}
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setEnvSuffixFn() {
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printf "%s\n" 'void set_env_suffix(char *env, char *sep, char *val) {'
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printf "%s\n" ' char *existing = getenv(env);'
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printf "%s\n" ' if (existing) val = concat3(existing, sep, val);'
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printf "%s\n" ' setenv(env, val, 1);'
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printf "%s\n" ' if (existing) free(val);'
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printf "%s\n" '}'
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printf '%s' "\
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void set_env_suffix(char *env, char *sep, char *val) {
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char *existing = getenv(env);
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if (existing) val = concat3(existing, sep, val);
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setenv(env, val, 1);
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if (existing) free(val);
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}
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"
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}
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