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author | Alyssa Ross <hi@alyssa.is> | 2019-01-07 02:18:36 +0000 |
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committer | Alyssa Ross <hi@alyssa.is> | 2019-01-07 02:18:47 +0000 |
commit | 36f56d99fa0a0765c9f1de4a5f17a9b05830c3f2 (patch) | |
tree | b3faaf573407b32aa645237a4d16b82778a39a92 /nixpkgs/pkgs/build-support/setup-hooks/make-wrapper.sh | |
parent | 4e31070265257dc67d120c27e0f75c2344fdfa9a (diff) | |
parent | abf060725d7614bd3b9f96764262dfbc2f9c2199 (diff) | |
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Add 'nixpkgs/' from commit 'abf060725d7614bd3b9f96764262dfbc2f9c2199'
git-subtree-dir: nixpkgs git-subtree-mainline: 4e31070265257dc67d120c27e0f75c2344fdfa9a git-subtree-split: abf060725d7614bd3b9f96764262dfbc2f9c2199
Diffstat (limited to 'nixpkgs/pkgs/build-support/setup-hooks/make-wrapper.sh')
-rw-r--r-- | nixpkgs/pkgs/build-support/setup-hooks/make-wrapper.sh | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/nixpkgs/pkgs/build-support/setup-hooks/make-wrapper.sh b/nixpkgs/pkgs/build-support/setup-hooks/make-wrapper.sh new file mode 100644 index 000000000000..bc12be0fa36c --- /dev/null +++ b/nixpkgs/pkgs/build-support/setup-hooks/make-wrapper.sh @@ -0,0 +1,153 @@ +# 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 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 +# The command can push extra flags to a magic list +# variable extraFlagsArray, which are then added to +# the invocation of the executable +# --add-flags FLAGS : add FLAGS to invocation of executable + +# --prefix ENV SEP VAL : suffix/prefix ENV with VAL, separated by SEP +# --suffix +# --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" == "--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 + + # Note: extraFlagsArray is an array containing additional flags + # that may be set by --run actions. + # Silence warning about unexpanded extraFlagsArray: + # shellcheck disable=SC2016 + echo exec ${argv0:+-a \"$argv0\"} \""$original"\" \ + "$flagsBefore" '"${extraFlagsArray[@]}"' '"$@"' >> "$wrapper" + + chmod +x "$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}" +} |