#!/usr/bin/env zshscript=$1actualSize=$(wc-c < $script)testDir=$TMPDIR/dots-partial-dl-test-$UID-$$if[[-d$testDir]];then
echo"$testDir exists, is this test already running?">&2
echo"Refusing to launch. Remove $testDir manually if necessary.">&2
exit-1fi
repeat-char(){local char=$1local-icount=$2(( count ))&&printf"$char%.0s"{1..$count}}
partial-dl-test(){local-ishowProgress=0 size=0 STATUS=0
local-Fpercent=0 progress=0
local OUT=''mkdir$testDir# We run the test for every partial filesize up to the actual size - 2,# because we expect the script to work properly when the entirety has been# downloaded, and it'll also work properly if just the last byte is missing# because that last byte is a newline.for(( size = 0; size < actualSize - 1; size++ ));do
percent=$(( size *100.0 / actualSize ))progress=$(( percent /10))(( showProgress++ % 100 == 0 || size == actualSize - 2 ))&&printf" [%-10s] [%${#actualSize}d/%d]\r""$(repeat-char =$progress)"$size$actualSize>&2
OUT=$(head-c$size$script | env-iHOME=$testDir/home zsh 2>&1)STATUS=$?if(( STATUS == 0 ));then# If zsh silently did nothing, that's fine.[[-z$OUT]]&&continue# If zsh non-silently reported a success, that's not fine.
print "dots reported a success with only $size bytes available, producing this output:${(qq)OUT}">&2
return$sizefi# There are a few error messages we can get from zsh that we expect to see when doing this kind of test.if![[$OUT='zsh: parse error'*||$OUT='zsh: unmatched '*||$OUT='zsh: closing brace expected'||$OUT='zsh: condition expected: '*]];then
print "dots produced unexpected output with only $size bytes available and status $STATUS: ${(qq)OUT}">&2
return$sizefi
if[[-d$testDir/home ]];then
print "dots bootstrapped itself with only $size bytes available, $percent% of its full $actualSize bytes!">&2
return$sizefi
done
print "dots safely did nothing for partially downloaded sizes up to $((size-1))/$actualSize bytes!">&2
}{
partial-dl-test
} always {rm-rf$testDir}