Fix regex to correctly search the right files to find latex package

news/changelog-1.8.md

@@ -62,6 +62,10 @@ All changes included in 1.8:
 
 - ([#12775](https://github.com/quarto-dev/quarto-cli/issues/12775)): Convert Quarto-native layouts (divs with `layout` syntax) to Beamer columns, equivalent to using the Pandoc-native syntax of div with `columns` and `column` classes.
 
+### `pdf`
+
+- ([#12732](https://github.com/quarto-dev/quarto-cli/issues/12732)): Correctly detect missing definition files in multiline babel error for search package to auto-install.
+
 ### `hugo-md`
 
 - ([#12676](https://github.com/quarto-dev/quarto-cli/issues/12676)): Add support for rendering layout panels that are not floats.

src/command/render/latexmk/parse-error.ts

@@ -270,7 +270,7 @@ const packageMatchers = [
   { regex: /.* Loading '([^']+)' aborted!.*/g },
   { regex: /.*! LaTeX Error: File `([^']+)' not found.*/g },
   { regex: /.* file ['`]?([^' ]+)'? not found.*/g },
-  { regex: /.*the language definition file ([^ ]+) .*/g },
+  { regex: /.*the language definition file ([^\s]*).*/g },
   { regex: /.* \\(file ([^)]+)\\): cannot open .*/g },
   { regex: /.*file `([^']+)' .*is missing.*/g },
   { regex: /.*! CTeX fontset `([^']+)' is unavailable.*/g },

tests/unit/latexmk/parse-error.test.ts

@@ -35,6 +35,12 @@ unitTest("Detect missing files with `findMissingFontsAndPackages`", async () =>
   assertFound("! LaTeX Error: File `framed.sty' not found.", "framed.sty");
   assertFound("/usr/local/bin/mktexpk: line 123: mf: command not found", "mf");
   assertFound("or the language definition file ngerman.ldf was not found", "ngerman.ldf");
+  assertFound(`Package babel Error: Unknown option 'ngerman'. Either you misspelled it
+    (babel)                or the language definition file ngerman.ldf
+    (babel)                was not found.
+    (babel)                There is a locale ini file for this language.
+    (babel)                If it’s the main language, try adding \`provide=*'
+    (babel)                to the babel package options.`, "ngerman.ldf")
   assertFound("!pdfTeX error: pdflatex (file 8r.enc): cannot open encoding file for reading", "8r.enc");
   assertFound("! CTeX fontset `fandol' is unavailable in current mode", "fandol");
   assertFound('Package widetext error: Install the flushend package which is a part of sttools', "flushend.sty");