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utils/lock.sh: repair style

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This commit is contained in:
hyuraku 2021-04-21 20:51:50 +09:00
parent daa8f7c858
commit 05260f4565
1 changed files with 19 additions and 17 deletions
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36
Library/Homebrew/utils/lock.sh
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@ -1,17 +1,19 @@
# create a lock using `flock(2)`. A name is required as first argument.
# the lock will be automatically unlocked when the shell process quits.
# Noted due to the fixed FD, a shell process can only create one lock.
# HOMEBREW_PREFIX is set by extend/ENV/super.rb
# shellcheck disable=SC2154
lock() {
local name="$1"
local lock_dir="$HOMEBREW_PREFIX/var/homebrew/locks"
local lock_file="$lock_dir/$name"
[[ -d "$lock_dir" ]] || mkdir -p "$lock_dir"
if ! [[ -w "$lock_dir" ]]
local lock_dir="${HOMEBREW_PREFIX}/var/homebrew/locks"
local lock_file="${lock_dir}/${name}"
[[ -d "${lock_dir}" ]] || mkdir -p "${lock_dir}"
if ! [[ -w "${lock_dir}" ]]
then
odie <<EOS
Can't create $name lock in $lock_dir!
Can't create ${name} lock in ${lock_dir}!
Fix permissions by running:
sudo chown -R \$(whoami) $HOMEBREW_PREFIX/var/homebrew
sudo chown -R \$(whoami) ${HOMEBREW_PREFIX}/var/homebrew
EOS
fi
# 200 is the file descriptor used in the lock.
@ -24,11 +26,11 @@ EOS
# close FD first, this is required if parent process holds a different lock.
exec 200>&-
# open the lock file to FD, so the shell process can hold the lock.
exec 200>"$lock_file"
if ! _create_lock 200 "$name"
exec 200>"${lock_file}"
if ! _create_lock 200 "${name}"
then
odie <<EOS
Another active Homebrew $name process is already in progress.
Another active Homebrew ${name} process is already in progress.
Please wait for it to finish or terminate it to continue.
EOS
fi
@ -39,19 +41,19 @@ _create_lock() {
local name="$2"
local ruby="/usr/bin/ruby"
local python="/usr/bin/python"
[[ -x "$ruby" ]] || ruby="$(type -P ruby)"
[[ -x "$python" ]] || python="$(type -P python)"
[[ -x "${ruby}" ]] || ruby="$(type -P ruby)"
[[ -x "${python}" ]] || python="$(type -P python)"
if [[ -x "$ruby" ]] && "$ruby" -e "exit(RUBY_VERSION >= '1.8.7')"
if [[ -x "${ruby}" ]] && "${ruby}" -e "exit(RUBY_VERSION >= '1.8.7')"
then
"$ruby" -e "File.new($lock_fd).flock(File::LOCK_EX | File::LOCK_NB) || exit(1)"
elif [[ -x "$python" ]]
"${ruby}" -e "File.new(${lock_fd}).flock(File::LOCK_EX | File::LOCK_NB) || exit(1)"
elif [[ -x "${python}" ]]
then
"$python" -c "import fcntl; fcntl.flock($lock_fd, fcntl.LOCK_EX | fcntl.LOCK_NB)"
"${python}" -c "import fcntl; fcntl.flock(${lock_fd}, fcntl.LOCK_EX | fcntl.LOCK_NB)"
elif [[ -x "$(type -P flock)" ]]
then
flock -n "$lock_fd"
flock -n "${lock_fd}"
else
onoe "Cannot create $name lock, please avoid running Homebrew in parallel."
onoe "Cannot create ${name} lock, please avoid running Homebrew in parallel."
fi
}