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|
#!/usr/bin/env bash
#
# Change files modification time to their last commit date
#
# Bash unofficial strict mode
set -euo pipefail
IFS=$'\n\t'
if [[ "${1:-}" == "--newer" ]]; then
op=le
shift
else
op=eq
fi
# BSD systems
if date -j &>/dev/null; then
stat_flags="-f %m"
date_flags="-r"
else
# Non-BSD systems
stat_flags="-c %Y"
date_flags="-d@"
fi
bash_opts=()
if bash --help 2>&1 | grep -q -- '--noprofile'; then
bash_opts+=(--noprofile)
fi
if bash --help 2>&1 | grep -q -- '--norc'; then
bash_opts+=(--norc)
fi
status_opts=(--porcelain --short)
# %ct: committer date, UNIX timestamp / %at: author date, UNIX timestamp
whatchanged_opts=(--format='%ct')
if git status --help 2>&1 | grep -q -- "--no-renames"; then
status_opts+=(--no-renames)
whatchanged_opts+=(--no-renames)
fi
if git status --help 2>&1 | grep -q -- "--untracked-files"; then
status_opts+=(--untracked-files=no)
fi
if git status --help 2>&1 | grep -q -- "--ignored"; then
status_opts+=(--ignored=no)
fi
prefix="$(git rev-parse --show-prefix) "
strip="${#prefix}"
tmpfile=$(mktemp)
# shellcheck disable=SC2064
trap "rm -f '${tmpfile}'" 0
awk_flags=(
-F'\t'
-v date_flags="${date_flags}"
-v op="${op}"
-v stat_flags="${stat_flags}"
-v strip="${strip}"
-v tmpfile="${tmpfile}"
)
# sanity check, not required:
if awk --help 2>&1 | grep -q -- '--posix'; then
awk_flags+=(--posix)
fi
read -r -d '' awk_script <<"EOF" || true
BEGIN {
seen[""]=1
print "#!/usr/bin/env bash"
print "set +e"
print "t() {"
print " test -e \"$2\" || return 0"
printf(" test \"$(stat %s \"$2\" 2>/dev/null)\" -%s \"$1\" && return 0\n", stat_flags, op)
if (date_flags == "-d@") {
print " echo \"+ touch -h -d@$1 $2\""
print " touch -h -d@$1 \"$2\""
} else {
print " t=$(date -r$1 \"+%Y%m%d%H%M.%S\")"
print " echo \"+ touch -h -t $t $2\""
print " touch -h -t $t \"$2\""
}
print "}"
}
FILENAME==tmpfile {
skip[$1]=1
next
}
# skip blank lines
!/^$/ {
# skip deletes
if (substr($1, length($1), 1) ~ /D/) {
next
}
if (NF == 1) {
ct=$1
next
}
$2 = substr($2, strip, length($2)- strip + 1)
if ($2 in seen) {
next
}
if ($2 in skip) {
next
}
seen[$2]=1
# remove enclosing double quotes that git adds:
if (substr($2, 1, 1) == "\"" && substr($2, length($2), 1) == "\"") {
$2 = substr($2, 2, length($2) - 2)
# unescape remaining double quotes
gsub(/\\"/, "\"", $2)
# unescape escaped backslashes
gsub(/\\\\/, "\\", $2)
}
# escape apostrophes: ' => '\''
gsub(/'/, "'\\''", $2)
printf("t %s '%s'\n", ct, $2)
}
EOF
# prefix is stripped:
git --no-pager status "${status_opts[@]}" . \
| cut -c 4- >"${tmpfile}"
# prefix is not stripped:
git --no-pager whatchanged "${whatchanged_opts[@]}" . \
| awk "${awk_flags[@]}" "${awk_script}" "${tmpfile}" - \
| BASH_ENV='' bash "${bash_opts[@]}" -
|
