Substr trim barfs on 1char

dev
1

What version of Hugo are you using (hugo version)?

$ hugo version
Hugo Static Site Generator v0.81.0-DEV/extended openbsd/amd64 BuildDate: unknown

Does this issue reproduce with the latest release?

{{ $path := "/"}}
{{ $path := ( substr $path 0 -1 ) }}
{{ $path :=  printf "/js/%s/%s" $path "boot.js" }}

produces:

js//boot.js

not a problem for unix paths but it’s not expected behaviour.

if I change $path to "XX/" the output is as expected js/XX/boot.js

2

The substr function does exactly what it should do: it removes one trailing character, setting $path to an empty string.

You are getting /js//boot.js (with double slashes) due to the printf format string; the first %s is an empty string.

Perhaps you can use path.Join instead:

{{ path.Join "/js" $path "boot.js" }}
3

it does for strings longer than one character. substr with negative index seems to barf when the string is one character long. At least in the version I’m working.

4

Which version?

The “out-of-bounds” issue was addressed about 8 months ago in 8a26ab0, available in v0.81.0 and later. You are currently using v0.81.0-DEV (built prior to release of v0.81.0).

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5

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