Re: [GSoC RFC PATCH v2 5/7] repo-info: add the field references.format

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On 24/06/2025 16:25, Junio C Hamano wrote:
> >>> +                echo '$expected_value' >expect &&
+                git repo-info '$key' >output &&
+                cat output | parse_json >parsed &&

Running "cat" on a single file and piping it to anything is an
anti-pattern.  The fact that you can pipe output into the downstream
command means that the downstream command is prepared to read from
its standard input, so

	parse_json <output >parsed &&

should be sufficient, right?

Good catch, I commented on this in a test below this one but missed it here.

+                grep -F 'row[0].$key' parsed | cut -d ' ' -f 2 >value &&
+                cat value | sed 's/^0$/false/' | sed 's/^1$/true/' >actual &&

sed accepts filenames so there is no need to use "cat" here. It also
accepts multiple expressions so you only need a single command

     sed "s/^0\$/false/; s/^1\$/true/" value >actual &&

And you probably do not even need grep piped into cut either, as sed
is a powerful enough language.  We can also cheat a bit by taking
advantage of the fact that the characters used in keys are fairly
tightly controlled, so perhaps something along this line?

	sed -n -e "/row[0].$key/{
		s/^[^ ]* //
                 s/^1\$/true/
		s/^0\$/false/
                 p;
	}" parsed >actual &&

Nice, as well as saving a couple of processes this avoids truncating values that contain a space.

Thanks

Phillip





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