Pandoc errors when full filter path is not specified. #3458
Description
Looks like this is something that's broken recently (used to work with 1.16 & 1.17)
Pandoc version -
D:\code\easyblogger>pandoc --version
pandoc 1.19.1
I have a pandoc filter called mermaid-filter which is installed with npm install -g raghur/mermaid-filter
D:\code\easyblogger\assets>which mermaid-filter.cmd
C:\Users\raghuramanr\AppData\Roaming\npm\mermaid-filter.cmd
This used to work - but now doesnt:
D:\code\easyblogger\assets>pandoc -t html -i test.md -F mermaid-filter.cmd
module.js:472
throw err;
^
Error: Cannot find module 'D:\code\easyblogger\assets\node_modules\mermaid-filter\index.js'
at Function.Module._resolveFilename (module.js:470:15)
at Function.Module._load (module.js:418:25)
at Module.runMain (module.js:605:10)
at run (bootstrap_node.js:420:7)
at startup (bootstrap_node.js:139:9)
at bootstrap_node.js:535:3
pandoc: Error running filter mermaid-filter.cmd
Filter returned error status 1
when called as a filter with just the cmd file, it cannot find node_modules correctly. Replacing with full path to the filter in the command above makes it succeed but isn't ideal..
Also this works as well (just to emphasize that I have a sane env)
D:\code\easyblogger\assets>pandoc -t json -i test.md | mermaid-filter.cmd
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{"pandoc-api-version":[1,17,0,4],"meta":{},"blocks":[{"t":"Header","c":[1,["this-is-a-test-file",[],[]],[{"t":"Str","c":"This"},{"t":"Space"},{"t":"Str","c":"is"},{"t":"Space"},{"t":"Str","c":"a"},{"t":"Space"},{"t":"Str","c":"test"},{"t":"Space"},{"t":"Str","c":"file"}]]},{"t":"Para","c":[{"t":"Image","c":[["",[],[]],[],["",""]]}]},{"t":"Para","c":[{"t":"Str","c":"This"},{"t":"Space"},{"t":"Str","c":"should"},{"t":"Space"},{"t":"Str","c":"get"},{"t":"Space"},{"t":"Str","c":"converted"}]}]}