feat(cli): add grep/find/findstr as alternative search strategy

[uinstinct]

Description

Search tool on cn relies on ripgrep for searching inside files which is often not present in the running system. This leads to the model using alternative approaches which might skip search for files altogether. This PR adds grep/find utility for linux and findstr for windows.

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• [] I've read the contributing guide
• [] The relevant docs, if any, have been updated or created
• [] The relevant tests, if any, have been updated or created

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Summary by cubic

Add a cross-platform fallback for CLI code search: use grep/find on Unix and findstr on Windows when ripgrep isn’t available. Improves reliability on systems without ripgrep and applies .gitignore excludes where supported.

• New Features
  • Automatically falls back to grep (Unix) or findstr (Windows) if ripgrep is missing.
  • Parses .gitignore and excludes matching files/dirs with ripgrep and grep.
  • Keeps file_pattern filtering for targeted searches.
  • Updates messages to surface warnings and use a unified “Error executing search” on failure.

^{Written for commit 9ba56ff. Summary will update automatically on new commits.}

[cubic-dev-ai]

1 issue found across 1 file

Prompt for AI agents (all 1 issues)

Understand the root cause of the following 1 issues and fix them.


<file name="extensions/cli/src/tools/searchCode.ts">

<violation number="1" location="extensions/cli/src/tools/searchCode.ts:75">
The fallback search uses `find -name` with the provided file pattern, but `-name` only matches the basename, so patterns with directories like `src/**/*.ts` stop working when falling back from ripgrep. Please switch to a path-aware match (e.g. `find … -path …`) to keep file filters consistent regardless of backend.</violation>
</file>

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[cubic-dev-ai]

The fallback search uses find -name with the provided file pattern, but -name only matches the basename, so patterns with directories like src/**/*.ts stop working when falling back from ripgrep. Please switch to a path-aware match (e.g. find … -path …) to keep file filters consistent regardless of backend.

Prompt for AI agents

Address the following comment on extensions/cli/src/tools/searchCode.ts at line 75:

<comment>The fallback search uses `find -name` with the provided file pattern, but `-name` only matches the basename, so patterns with directories like `src/**/*.ts` stop working when falling back from ripgrep. Please switch to a path-aware match (e.g. `find … -path …`) to keep file filters consistent regardless of backend.</comment>

<file context>
@@ -3,11 +3,83 @@ import * as fs from &quot;fs&quot;;
+      excludeArgs += ` --exclude=&quot;${ignorePattern}&quot; --exclude-dir=&quot;${ignorePattern}&quot;`; // use both exclude and exclude-dir because ignorePattern can be a file or directory
+    }
+    if (filePattern) {
+      command = `find . -type f -name &quot;${filePattern}&quot; -print0 | xargs -0 grep -nH -I${excludeArgs} &quot;${pattern}&quot;`;
+    } else {
+      command = `grep -R -n -H -I${excludeArgs} &quot;${pattern}&quot; .`;
</file context>

Suggested change

	command = `find . -type f -name "${filePattern}" -print0 | xargs -0 grep -nH -I${excludeArgs} "${pattern}"`;
	command = `find . -type f -path "./${filePattern}" -print0 | xargs -0 grep -nH -I${excludeArgs} "${pattern}"`;