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feat: extract smol-bin and plugin shim from Windows installer

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The Windows installer contains smol-bin.x64.vhdx (SDK binaries for
KVM guest) and cowork-plugin-shim.sh (MCP plugin sandboxing). Both
were previously unavailable on Linux.

build.sh:
- Add copy_cowork_resources() to extract both files from the
  Windows installer nupkg to Electron resources directory
- Patch index.js smol-bin copy to run on Linux (was win32-only)

cowork-vm-service.js:
- Convert smol-bin.vhdx to qcow2 at startVM time (same pattern as
  rootfs conversion)
- Check bundleDir for smol-bin before falling back to VM_BASE_DIR

Refs #288

Co-Authored-By: Claude <claude@anthropic.com>
This commit is contained in:
aaddrick
2026-03-19 07:17:02 -04:00
parent 2c62b79f0e
commit a5f16b2d5c
2 changed files with 94 additions and 1 deletions
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76
build.sh
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@@ -1273,6 +1273,45 @@ if (serviceErrorIdx !== -1) {
}
}
// ============================================================
// Patch 9: Copy smol-bin VHDX on Linux (not just win32)
// The app copies smol-bin from resources to the bundle dir at
// startup, but only on win32. Extend to include Linux so the
// KVM guest can access SDK binaries from the smol-bin disk.
// Anchor: unique string "smol-bin" near platform==="win32"
// Strategy: find the win32 check that precedes "smol-bin" and
// extend it to also match Linux.
// ============================================================
{
const smolIdx = code.indexOf('smol-bin');
if (smolIdx !== -1) {
// Search backwards for the nearest platform==="win32" check
const searchStart = Math.max(0, smolIdx - 300);
const before = code.substring(searchStart, smolIdx);
const win32Re = /process\.platform==="win32"/g;
let lastWin32 = null;
let m;
while ((m = win32Re.exec(before)) !== null) {
lastWin32 = m;
}
if (lastWin32) {
const absIdx = searchStart + lastWin32.index;
const oldStr = lastWin32[0];
const newStr =
'(process.platform==="win32"' +
'||process.platform==="linux")';
code = code.substring(0, absIdx) +
newStr + code.substring(absIdx + oldStr.length);
console.log(' Patched smol-bin copy to include Linux');
patchCount++;
} else {
console.log(' WARNING: Could not find win32 gate near smol-bin');
}
} else {
console.log(' WARNING: Could not find smol-bin reference');
}
}
fs.writeFileSync(indexJs, code);
console.log(` Applied ${patchCount} cowork patches`);
if (patchCount < 5) {
@@ -1503,6 +1542,42 @@ copy_ssh_helpers() {
section_footer 'SSH Helpers'
}
copy_cowork_resources() {
section_header 'Cowork Resources'
local resources_src="$claude_extract_dir/lib/net45/resources"
# Copy cowork-plugin-shim.sh (used by app for MCP plugin sandboxing)
local shim_src="$resources_src/cowork-plugin-shim.sh"
if [[ -f $shim_src ]]; then
cp "$shim_src" "$electron_resources_dest/cowork-plugin-shim.sh"
chmod +x "$electron_resources_dest/cowork-plugin-shim.sh"
echo "Copied cowork-plugin-shim.sh"
else
echo "Warning: cowork-plugin-shim.sh not found at $shim_src"
fi
# Copy smol-bin VHDX (contains SDK binaries for KVM guest VM).
# The app copies this from resources to the bundle dir at startup
# (win32-gated; our index.js patch extends this to Linux).
# App looks for smol-bin.{arch}.vhdx where arch is x64 or arm64.
local smol_arch='x64'
if [[ $architecture == 'arm64' ]]; then
smol_arch='arm64'
fi
local smol_vhdx="$resources_src/smol-bin.${smol_arch}.vhdx"
if [[ -f $smol_vhdx ]]; then
cp "$smol_vhdx" \
"$electron_resources_dest/smol-bin.${smol_arch}.vhdx"
echo "Copied smol-bin.${smol_arch}.vhdx"
else
echo "Warning: smol-bin VHDX not found at $smol_vhdx"
echo "KVM Cowork will rely on virtiofs for SDK access"
fi
section_footer 'Cowork Resources'
}
#===============================================================================
# Packaging Functions
#===============================================================================
@@ -1726,6 +1801,7 @@ main() {
fi
process_icons
copy_ssh_helpers
copy_cowork_resources
cd "$project_root" || exit 1