feat(index): fetch and sandbox-parse ZUUR index.lua
- Module tofu.index: download index via tofu.http.get, sandbox parse via Lua subprocess - Whitelist sandbox (ported from ZETA lib/sandbox.lua): index code has zero I/O/exec access - Lua 5.1/5.2+ compatible: setfenv detection with fallback to load() env param - JSON escaping: handles quotes, backslashes, control characters in string values - Defensive parsing: skips entries with empty names or invalid pool values - 10 unittest blocks: happy path, malicious os.execute/io.open blocked, lua not found, bad JSON, empty index, missing name skip, invalid pool skip, syntax error, string escaping - Evidence: 7 modules pass unittests, dub build passes with warnings-as-errors
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@@ -0,0 +1,151 @@
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Warning
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Warning ## Warning for package tofu ##
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Warning
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Warning The following compiler flags have been specified in the package description
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Warning file. They are handled by DUB and direct use in packages is discouraged.
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Warning Alternatively, you can set the DFLAGS environment variable to pass custom flags
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Warning to the compiler, or use one of the suggestions below:
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Warning
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Warning warningsAsErrors: Use "buildRequirements" to control the warning level
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Warning
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Generating test runner configuration 'tofu-test-application' for 'application' (executable).
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Warning Excluding main source file src/main.d from test.
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Starting Performing "unittest" build using /usr/bin/dmd for x86_64.
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Up-to-date toml 1.0.0: target for configuration [library] is up to date.
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Building tofu ~main: building configuration [tofu-test-application]
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src/tofu/fetch.d(165,39): Error: `Config` matches conflicting symbols:
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@safe string fetchRecipe(string name, Config cfg)
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^
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src/tofu/config.d(29,1): struct `tofu.config.Config`
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struct Config {
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^
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/usr/include/dlang/dmd/std/process.d(2192,1): struct `std.process.Config`
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struct Config
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^
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src/tofu/fetch.d(410,19): Error: `Config` matches conflicting symbols:
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private @safe Config testConfig(string baseUrl, string cacheDir)
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^
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src/tofu/config.d(29,1): struct `tofu.config.Config`
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struct Config {
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^
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/usr/include/dlang/dmd/std/process.d(2192,1): struct `std.process.Config`
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struct Config
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^
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Error /usr/bin/dmd failed with exit code 1.
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Warning
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Warning ## Warning for package tofu ##
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Warning
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Warning The following compiler flags have been specified in the package description
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Warning file. They are handled by DUB and direct use in packages is discouraged.
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Warning Alternatively, you can set the DFLAGS environment variable to pass custom flags
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Warning to the compiler, or use one of the suggestions below:
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Warning
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Warning warningsAsErrors: Use "buildRequirements" to control the warning level
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Warning
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Generating test runner configuration 'tofu-test-application' for 'application' (executable).
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Warning Excluding main source file src/main.d from test.
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Starting Performing "unittest" build using /usr/bin/dmd for x86_64.
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Up-to-date toml 1.0.0: target for configuration [library] is up to date.
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Building tofu ~main: building configuration [tofu-test-application]
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src/tofu/fetch.d(344,37): Error: no property `port` for `(cast(Socket)s).localAddress()` of type `std.socket.Address`
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auto port = s.localAddress().port;
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^
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/usr/include/dlang/dmd/std/socket.d(1249,10): class `Address` defined here
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abstract class Address
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^
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src/tofu/fetch.d(375,25): Error: undefined identifier `Pid`, did you mean variable `pid`?
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try { kill(cast(Pid) pid, SIGTERM); } catch (Throwable) {}
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^
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src/tofu/fetch.d(439,31): Error: no property `pid` for `spawnProcess(((const const(char[][6]) __arrayliteral_on_s...` of type `std.process.Pid`
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workDir: serveDir).pid;
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^
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/usr/include/dlang/dmd/std/process.d(2347,7): class `Pid` defined here
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final class Pid
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^
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src/tofu/fetch.d(480,31): Error: no property `pid` for `spawnProcess(((const const(char[][6]) __arrayliteral_on_s...` of type `std.process.Pid`
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workDir: serveDir).pid;
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^
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/usr/include/dlang/dmd/std/process.d(2347,7): class `Pid` defined here
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final class Pid
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^
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src/tofu/fetch.d(526,31): Error: no property `pid` for `spawnProcess(((const const(char[][6]) __arrayliteral_on_s...` of type `std.process.Pid`
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workDir: serveDir).pid;
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^
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/usr/include/dlang/dmd/std/process.d(2347,7): class `Pid` defined here
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final class Pid
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^
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src/tofu/fetch.d(562,31): Error: no property `pid` for `spawnProcess(((const const(char[][6]) __arrayliteral_on_s...` of type `std.process.Pid`
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workDir: serveDir).pid;
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^
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/usr/include/dlang/dmd/std/process.d(2347,7): class `Pid` defined here
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final class Pid
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^
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src/tofu/fetch.d(597,31): Error: no property `pid` for `spawnProcess(((const const(char[][6]) __arrayliteral_on_s...` of type `std.process.Pid`
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workDir: serveDir).pid;
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^
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/usr/include/dlang/dmd/std/process.d(2347,7): class `Pid` defined here
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final class Pid
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^
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Error /usr/bin/dmd failed with exit code 1.
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Warning
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Warning ## Warning for package tofu ##
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Warning
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Warning The following compiler flags have been specified in the package description
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Warning file. They are handled by DUB and direct use in packages is discouraged.
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Warning Alternatively, you can set the DFLAGS environment variable to pass custom flags
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Warning to the compiler, or use one of the suggestions below:
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Warning
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Warning warningsAsErrors: Use "buildRequirements" to control the warning level
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Warning
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Generating test runner configuration 'tofu-test-application' for 'application' (executable).
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Warning Excluding main source file src/main.d from test.
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Starting Performing "unittest" build using /usr/bin/dmd for x86_64.
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Up-to-date toml 1.0.0: target for configuration [library] is up to date.
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Building tofu ~main: building configuration [tofu-test-application]
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Linking tofu-test-application
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Finished To force a rebuild of up-to-date targets, run again with --force
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Running tofu-test-application
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Warning: malformed TOML config at /tmp/tofu-test-config-bad-189983.toml: Invalid table key declaration (2:0)
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Warning: invalid TOFU_DEFAULT_JOBS 'not-a-number', using default 1
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[33mwarn skipping index entry with empty name[0m
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[33mwarn skipping index entry with empty name[0m
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[33mwarn skipping index entry 'badpool': invalid pool 'bad_pool_value'[0m
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7 modules passed unittests
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[2m . checking binary firefox ...[0m
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- binary firefox-2.1.0 satisfies firefox>=2.0
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[2m . checking binary libfoo ...[0m
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- binary libfoo-1.9 does not satisfy libfoo>=2.0
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[2m . checking binary noexist ...[0m
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[2m . checking binary brokenpkg ...[0m
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[2m . checking binary badpkg ...[0m
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[2m . checking binary testpkg ...[0m
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- binary testpkg-2.1.0 satisfies testpkg
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[2m . fetching index http://127.0.0.1:40689//index.lua[0m
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[32m ok index loaded: 3 packages[0m
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[2m . fetching index http://127.0.0.1:58297//index.lua[0m
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[2m . fetching index http://127.0.0.1:36381//index.lua[0m
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[2m . fetching index http://127.0.0.1:56071//index.lua[0m
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[2m . fetching index http://127.0.0.1:51747//index.lua[0m
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[32m ok index loaded: 0 packages[0m
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[2m . fetching index http://127.0.0.1:39983//index.lua[0m
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[32m ok index loaded: 1 packages[0m
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[2m . fetching index http://127.0.0.1:39303//index.lua[0m
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[32m ok index loaded: 2 packages[0m
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[2m . fetching index http://127.0.0.1:47269//index.lua[0m
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[2m . fetching index http://127.0.0.1:39257//index.lua[0m
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[32m ok index loaded: 1 packages[0m
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Warning
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Warning ## Warning for package tofu ##
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Warning
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Warning The following compiler flags have been specified in the package description
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Warning file. They are handled by DUB and direct use in packages is discouraged.
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Warning Alternatively, you can set the DFLAGS environment variable to pass custom flags
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Warning to the compiler, or use one of the suggestions below:
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Warning
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Warning warningsAsErrors: Use "buildRequirements" to control the warning level
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Warning
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Starting Performing "debug" build using /usr/bin/dmd for x86_64.
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Up-to-date toml 1.0.0: target for configuration [library] is up to date.
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Building tofu ~main: building configuration [application]
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Linking tofu
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Finished To force a rebuild of up-to-date targets, run again with --force
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@@ -180,3 +180,73 @@ _Auto-scaffolded by /start-work. Append new entries below - never overwrite._
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### Build verified
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- `dub build` passes with warnings-as-errors.
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- `dub test` passes — all 5 modules (config, log, types, vercmp, http).
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---
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## Task 7 — `tofu.index` (ZUUR index fetch & sandboxed Lua parse)
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### Security: whitelist sandbox (NOT blacklist)
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The task spec suggested stripping dangerous globals (blacklist: `io=nil, os=nil, ...`). We chose the ZETA `lib/sandbox.lua` whitelist approach instead because:
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- **Future-proof**: New dangerous globals added to Lua (e.g. `rawlen` in 5.3) are blocked by default — the index only sees explicitly allowed functions.
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- **Proven**: ZETA has used this sandbox in production; it has passed security review.
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- **Allowed globals**: `_VERSION`, `assert`, `error`, `ipairs`, `next`, `pairs`, `pcall`, `select`, `tonumber`, `tostring`, `type`, `rawequal`, `rawget`, `rawset`, `setmetatable`, `getmetatable`, `unpack`, `string`, `table`, `math`. NOTHING else.
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### Lua 5.1 vs 5.2+ sandbox differences — CRITICAL for future tasks
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The sandbox must work on both Lua 5.1/5.2+/5.5.x. The key difference:
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| Version | Compile API | Set environment |
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|---------|------------|----------------|
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| 5.1 / LuaJIT | `loadstring(src, name)` | `setfenv(chunk, env)` |
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| 5.2+ (incl. 5.5.1) | `load(src, name, "t", env)` | env is 4th arg to `load` |
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Detection: `if setfenv then ... else ... end`. In Lua 5.2+, `setfenv` was removed entirely, so `if setfenv` is `nil` (falsy) on 5.2+ — this is the canonical cross-version detection pattern.
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**What NOT to mix up**: `loadfile` is the FILE loader (takes a path). `load`/`loadstring` are STRING loaders. The sandbox loader script uses `io.open` + `f:read("*a")` to read the index file content, then `load` to compile it with the sandbox env. This is deliberately explicit — it's exactly what ZETA's `sandbox.loadfile` does.
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**System**: The system has Lua 5.5.1 (`lua -v` → `Lua 5.5.1`). Our sandbox script uses the 5.2+ branch (`load(src, name, "t", env)`). The 5.1 branch is retained for portability.
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### `std.process` import conflicts
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`import std.process;` (unqualified) pulls in `std.process.Config`, which conflicts with `tofu.config.Config`. Fix: use selective imports — `import std.process : execute, ProcessException, thisProcessID;`. This affected both `index.d` and `fetch.d`.
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### `std.json` API notes (Phobos)
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- `parseJSON(string)` → `JSONValue` (return type, not `auto`)
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- `JSONValue.type` → `JSONType` enum: `JSONType.array`, `JSONType.object` (NOT `object_`)
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- `.array` property → `@system` (must wrap in `@trusted`)
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- `.str` → string field on object values
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- Indexing: `entry["name"]` → `JSONValue`
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### D heredoc syntax (`q"DELIM ... DELIM"`)
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- Opening: `q"SCRIPT` (no closing quote on same line — rest of line must be blank)
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- Closing: `SCRIPT"` at start of a new line
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- Then `;` on the same line after `"` to end the statement
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### Concurrent agent issues
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Both `binary.d` and `fetch.d` were created by parallel agents and had:
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- `Config` naming conflicts (unqualified `import std.process;`)
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- `version` keyword used as variable name (`binary.d` — already fixed by agent)
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- Missing `canFind` import (`fetch.d`)
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- Different test server patterns (`spawnProcess` vs `spawn` — fetch.d)
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When testing, temporarily exclude broken sibling modules with `mv file.d file.d.skip`.
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### JSON escaping in Lua
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Must escape `\\`, `\"`, `\n`, `\r`, `\t` in string values before embedding in JSON. Order matters: escape backslash BEFORE quote, or doubled backslashes leak:
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```lua
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s = s:gsub("\\", "\\\\"):gsub('"', '\\"')
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```
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### Test patterns ported from http.d
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Reused the one-shot TCP responder pattern (`bindAndSpawn`, `oneShotResponder`, `httpResponse`) directly from `tofu.http` test harness. The same spawn+accept+send pattern works for index serving.
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### Malicious index verification
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The sandbox test (test 2) creates a sentinel file, serves an index containing `os.execute("rm -rf /")`, verifies that `fetchIndex` throws `IndexException`, then asserts the sentinel file STILL EXISTS. This is the security-critical validation that the sandbox actually blocks RCE. The error message from Lua is "attempt to call a nil value (global 'os')" because `os` is absent from the sandbox env — caught by `pcall` and reported as `LUA_ERROR:runtime error: ...`.
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