Don't crash trying to parse a command line that's a directory

[ianjoneill]

Summary of the Pull Request

Prevents a crash that could occur when invoking wt C:\

PR Checklist

• Closes Terminal crashes on wt . #12535
• CLA signed. If not, go over here and sign the CLA
• Tests added/passed
• Documentation updated. If checked, please file a pull request on our docs repo and link it here: #xxx
• Schema updated.
• I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

Detailed Description of the Pull Request / Additional comments

Updates CascadiaSettings::NormalizeCommandLine() to check that there are a suitable number of command line arguments to be concatenated together, to prevent accessing an array index in argv that doesn't exist.

Also prevents a test flake that could occur in TerminalSettingsTests::CommandLineToArgvW(), due to generating an empty command line argument.

Validation Steps Performed

Added a test, and checked that invoking each of the command lines below behaved as expected:

wtd C:\ # Window pops up with [error 2147942405 (0x80070005) when launching `C:\']
wtd C:\Program Files # Window pops up with [error 2147942402 (0x80070002) when launching `C:\Program Files']
wtd cmd # cmd profile pops up
wtd C:\Program Files\Powershell\7\pwsh -WorkingDirectory C:\ # PowerShell profile pops up in C:\
wtd "C:\Program Files\Powershell\7\pwsh" -WorkingDirectory C:\ # PowerShell profile pops up in C:\
wtd . # Window pops up with [error 2147942405 (0x80070005) when launching `.']

[github-actions]

@check-spelling-bot Report

Unrecognized words, please review:

• erroenously

Previously acknowledged words that are now absent

azurewebsites cxcy debolden deconstructed devicefamily guardxfg LLVM MSDL ned NOWAIT pgorepro pgort PGU Timeline timelines unintense WResult xfg

To accept these unrecognized words as correct (and remove the previously acknowledged and now absent words), run the following commands

... in a clone of the git@github.com:ianjoneill/terminal.git repository
on the f-dont-crash-trying-to-execute-directory branch:

update_files() {
perl -e '
my @expect_files=qw('".github/actions/spelling/expect/alphabet.txt
.github/actions/spelling/expect/expect.txt
.github/actions/spelling/expect/web.txt"');
@ARGV=@expect_files;
my @stale=qw('"$patch_remove"');
my $re=join "|", @stale;
my $suffix=".".time();
my $previous="";
sub maybe_unlink { unlink($_[0]) if $_[0]; }
while (<>) {
if ($ARGV ne $old_argv) { maybe_unlink($previous); $previous="$ARGV$suffix"; rename($ARGV, $previous); open(ARGV_OUT, ">$ARGV"); select(ARGV_OUT); $old_argv = $ARGV; }
next if /^(?:$re)(?:(?:\r|\n)*$| .*)/; print;
}; maybe_unlink($previous);'
perl -e '
my $new_expect_file=".github/actions/spelling/expect/788d33ce94d28e2903bc49f841ce279211b7f557.txt";
use File::Path qw(make_path);
use File::Basename qw(dirname);
make_path (dirname($new_expect_file));
open FILE, q{<}, $new_expect_file; chomp(my @words = <FILE>); close FILE;
my @add=qw('"$patch_add"');
my %items; @items{@words} = @words x (1); @items{@add} = @add x (1);
@words = sort {lc($a)."-".$a cmp lc($b)."-".$b} keys %items;
open FILE, q{>}, $new_expect_file; for my $word (@words) { print FILE "$word\n" if $word =~ /\w/; };
close FILE;
system("git", "add", $new_expect_file);
'
}

comment_json=$(mktemp)
curl -L -s -S \
  --header "Content-Type: application/json" \
  "https://api.github.com/repos/microsoft/terminal/issues/comments/1046219132" > "$comment_json"
comment_body=$(mktemp)
jq -r .body < "$comment_json" > $comment_body
rm $comment_json

patch_remove=$(perl -ne 'next unless s{^</summary>(.*)</details>$}{$1}; print' < "$comment_body")
  

patch_add=$(perl -e '$/=undef;
$_=<>;
s{<details>.*}{}s;
s{^#.*}{};
s{\n##.*}{};
s{(?:^|\n)\s*\*}{}g;
s{\s+}{ }g;
print' < "$comment_body")
  
update_files
rm $comment_body
git add -u

✏️ Contributor please read this

By default the command suggestion will generate a file named based on your commit. That's generally ok as long as you add the file to your commit. Someone can reorganize it later.

⚠️ The command is written for posix shells. You can copy the contents of each perl command excluding the outer ' marks and dropping any '"/"' quotation mark pairs into a file and then run perl file.pl from the root of the repository to run the code. Alternatively, you can manually insert the items...

If the listed items are:

• ... misspelled, then please correct them instead of using the command.
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• ... APIs, you can add them to a file in .github/actions/spelling/allow/.
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• ... tokens you only need in one place and shouldn't generally be used, you can add an item in an appropriate file in .github/actions/spelling/patterns/.

See the README.md in each directory for more information.

🔬 You can test your commits without appending to a PR by creating a new branch with that extra change and pushing it to your fork. The check-spelling action will run in response to your push -- it doesn't require an open pull request. By using such a branch, you can limit the number of typos your peers see you make. 😉

🗜️ If you see a bunch of garbage

If it relates to a ...

well-formed pattern

See if there's a pattern that would match it.

If not, try writing one and adding it to a patterns/{file}.txt.

Patterns are Perl 5 Regular Expressions - you can test yours before committing to verify it will match your lines.

Note that patterns can't match multiline strings.

binary-ish string

Please add a file path to the excludes.txt file instead of just accepting the garbage.

File paths are Perl 5 Regular Expressions - you can test yours before committing to verify it will match your files.

^ refers to the file's path from the root of the repository, so ^README\.md$ would exclude README.md (on whichever branch you're using).

[zadjii-msft]

Thanks for hopping on this so fast!

[zadjii-msft]

@msftbot make sure @lhecker approves

[ghost]

Hello @zadjii-msft!

Because you've given me some instructions on how to help merge this pull request, I'll be modifying my merge approach. Here's how I understand your requirements for merging this pull request:

• I'll only merge this pull request if it's approved by @lhecker

If this doesn't seem right to you, you can tell me to cancel these instructions and use the auto-merge policy that has been configured for this repository. Try telling me "forget everything I just told you".

[lhecker]

Thanks for fixing this!

[ghost]

Hello @lhecker!

Because this pull request has the AutoMerge label, I will be glad to assist with helping to merge this pull request once all check-in policies pass.

p.s. you can customize the way I help with merging this pull request, such as holding this pull request until a specific person approves. Simply @mention me (@msftbot) and give me an instruction to get started! Learn more here.

[ghost]

🎉Windows Terminal v1.12.1073 has been released which incorporates this pull request.:tada:

Handy links:

• Release Notes
• Store Download

[ghost]

🎉Windows Terminal Preview v1.13.1073 has been released which incorporates this pull request.:tada:

Handy links:

• Release Notes
• Store Download