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feat(modgraph): the build list of a go.work workspace - #56
A caller kept no module graph for a module that a go.work workspace uses. The go command builds such a module with the build list of the workspace, which no single go.mod holds. So a graph of one go.mod could miss an edge. vet keeps unknown · no graph for each Go finding of a workspace today, and vet itself is a workspace.
DiscoverOptions.Work names the go.work file. Discover then gives the build list of the workspace for the module in Dir:
The build list follows readModGraph of the go command in workspace mode:
The graph holds the requirements of each workspace module and of the go.mod of each such requirement.
A go.mod below go 1.17, a workspace module too, adds each go.mod down the chain.
Then the reload pass runs. While a module that the build needs requires a module below its selected version, the go.mod of the selected version joins the graph.
A requirement on a workspace module at a version reads the go.mod of that version. The build uses the code of the workspace.
Each other workspace module is a local source, read inside LocalRoot.
The replace directives of go.work win. Two workspace modules that replace one module with other code make Discover fail.
Vendor mode follows the go command:
the vendor directory sits next to go.work
go.work says go 1.14 or later
the first line of modules.txt holds the ## workspace annotation
Each listed module then comes from vendor. Outside a workspace, Discover reads no vendor directory of a workspace.
modules.txt is read as modload reads it: a module enters the list only from a header with package lines.
Discover fails when it cannot know the build list, because a wrong version can hide an edge. That happens when:
a go.mod that the graph needs is not on the disk
a workspace module is outside LocalRoot
a go.mod has an exclude directive
examples/modgraph gets a -work flag. docs/modgraph.md has a Workspaces section.
Verification
TestDiscoverGivesTheBuildListOfTheGoCommand serves synthetic modules from a proxy on the disk. It runs go mod download and go list -m all, and compares the result with Discover for workspaces where the versions of two modules differ. It needs no network.
TestBuildHoldsEachEdgeOfGoListInAWorkspace puts this repository in a workspace with a probe module. For each workspace module, it compares each version with go list -m all and each edge with go list -deps -test on four platforms.
A project in MODGRAPH_ORACLE_DIRS with a go.work gets the same check.
Workspace
Build list
go list -m all matches
go list edges (linux/amd64)
All in the graph
this repository and a probe module
324 modules
yes
105 and 6
yes
safedep/vet (. and ./scripts)
758 modules
yes
693 and 5
yes
A Fable sub-agent reviewed the first commit against the modload source and ran the real go command on synthetic workspaces. It found six inputs with a wrong version or source:
the reload pass
a versioned requirement on a workspace module
a workspace module below go 1.17
the vendor mode rule
a local replacement in workspace vendor mode
a wildcard line of modules.txt
The second commit fixes each one, and the tests above fail on the first commit.
go test ./..., go vet ./... and golangci-lint run ./... pass.
Next
The vet pull request passes the go.work that vet finds to Discover. A module that only the workspace adds, or another workspace module, then passes its imports on. On vet itself, the 12 Go findings that read unknown · no graph become imported. It is pushed on safedep/vet claude/go-work-graph, with safedep/code pinned to this branch.
A caller kept no module graph for a module of a go.work workspace. The go
command builds such a module with the build list of the workspace, which
no single go.mod holds, so a graph of one go.mod could miss an edge.
DiscoverOptions.Work names the go.work file. Discover then gives the
build list of the workspace: minimal version selection with module graph
pruning over the requirements of each module of the workspace. Each other
module of the workspace is a local source. The replace directives of
go.work win over those of the modules, and the vendor directory of the
workspace applies from go 1.22. Discover fails when it cannot know the
build list, because a wrong version can hide an edge.
The oracle test now checks a workspace of this repository and a probe
module, and a project of MODGRAPH_ORACLE_DIRS with a go.work. It compares
each version with go list -m all and each edge with go list -deps -test.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
Signed-off-by: Claude <noreply@anthropic.com>
A review compared Discover with the go command and found six inputs that
gave a wrong version or a wrong source. A wrong version can hide an edge.
- The build list missed the reload pass of readModGraph. A module that
the build needs and that requires a module below its selected version
now loads the go.mod of the selected version, until nothing changes.
- A requirement on a workspace module at a version now reads the go.mod
of that version, as the go command does.
- A workspace module below go 1.17 now follows its requirements down the
chain.
- Vendor mode now follows the go command: a vendor directory next to
go.work, go 1.14 or later, and the workspace annotation of modules.txt.
In vendor mode each listed module comes from vendor. Outside a
workspace, Discover reads no vendor directory of a workspace.
- modules.txt is read as modload reads it. A wildcard replacement line
no longer clears the version of a module.
A new test serves synthetic modules from a proxy on the disk and
compares Discover with go list -m all for each case. The oracle no longer
skips on a Discover error other than a go.mod that is not on the disk.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
Signed-off-by: Claude <noreply@anthropic.com>
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Commits
Reviewing files that changed from the base of the PR and between d582818 and fe48e4f.
Files selected for processing: 3
modgraph/discover.go
modgraph/workspace.go
modgraph/workspace_test.go
Walkthrough
Discovery now accepts a workspace file and resolves workspace build lists, module sources, replacements, and vendor data. The example command exposes workspace selection, and tests compare workspace discovery with Go command output.
Changes: Workspace module graph discovery
Layer / File(s)
Summary
Discover options and module source resolution modgraph/discover.go
DiscoverOptions adds workspace input. Discovery resolves replacements and selects module sources from vendor data, bounded local directories, or the module cache.
Workspace parsing and build-list computation modgraph/workspace.go, modgraph/buildlist_test.go, modgraph/workspace_test.go
Workspace discovery parses used modules and replacements, traverses requirements, and selects dependency versions. Tests compare build lists and cover replacement and error cases.
Workspace sources and vendor selection modgraph/workspace.go, modgraph/workspace_test.go, docs/modgraph.md
Discovery collects workspace checksums, includes workspace modules as local sources, and selects workspace vendor data when applicable. The documentation describes workspace discovery and its constraints.
Workspace option in the example command examples/modgraph/main.go, examples/modgraph/main_test.go, docs/modgraph.md
The example accepts a workspace file, uses its directory as LocalRoot, and passes the file to Discover.
sequenceDiagram
participant Command as Example command
participant Run as run
participant Discover as modgraph.Discover
participant Workspace as discoverWorkspace
participant Reader as readWorkspace
Command->>Run: Pass workspace file
Run->>Discover: Set Work and LocalRoot
Discover->>Workspace: Delegate workspace discovery
Workspace->>Reader: Read go.work and module go.mod files
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Possibly related PRs
safedep/code#54: Introduced modgraph.Discover and its source resolution and oracle tests, which this PR extends with workspace support.
Merge Risk: Moderate · up to d5828
The documented relative -work invocation cannot discover its workspace module. Normalize workspace paths before merging.
Pre-merge checks: 4 · 1
Failed checks: 1 warning
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Docstring coverage is 52.78% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 36 functions across 7 files. (1 skipped: …
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 4 passed
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Title check
The title "feat(modgraph): the build list of a go.work workspace" matches the main change. The PR adds workspace build-list discovery to modgraph.Discover through a new DiscoverOptions.Work field, whi…
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Explanation
The title "feat(modgraph): the build list of a go.work workspace" matches the main change. The PR adds workspace build-list discovery to modgraph.Discover through a new DiscoverOptions.Work field, which reads go.work and workspace go.mod files (modgraph/workspace.go, modgraph/discover.go). The title is short, uses a conventional commit prefix, and names the scope (modgraph) and the feature (go.work workspace build list). It does not cover the vendor-mode, replacement, or example CLI (-work flag) changes, but the task says the title need not cover every detail.
Full details: Docstring Coverage
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Docstring coverage is 52.78% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 36 functions across 7 files. (1 skipped: 1 unsupported.)
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Write docstrings for the functions missing them to satisfy the coverage threshold.
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A review of safedep/code#56 found six inputs where the build list of a
workspace differed from the go command. The fixed head follows
readModGraph and the vendor rules of the go command.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
❌ Patch coverage is 88.32808% with 37 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.22%. Comparing base (634749b) to head (fe48e4f).
A relative Work with relative use directives gave relative directories
of the workspace, while mainAt compared them with an absolute Dir. So
Discover refused a valid workspace, and the relative -work example of
examples/modgraph failed. A relative LocalRoot could mix the two forms
in the same way. Discover now makes Dir, Work and LocalRoot absolute
before it reads them.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
Signed-off-by: Claude <noreply@anthropic.com>
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Actionable comments posted: 1
🪄 Fix comments: Fix CodeRabbit comments on this PR
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @modgraph/workspace.go:
- Around line 33-34: Update discoverWorkspace to make opts.Work absolute before
passing it to readWorkspace, and make opts.LocalRoot absolute when it is
non-empty so relative paths work in workspace comparisons. Propagate
path-resolution errors with context, and add a Discover test using a relative
Work path.
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Reviewing files that changed from the base of the PR and between 634749b and d582818.
Files selected for processing: 8
docs/modgraph.md
examples/modgraph/main.go
examples/modgraph/main_test.go
modgraph/buildlist_test.go
modgraph/discover.go
modgraph/oracle_test.go
modgraph/workspace.go
modgraph/workspace_test.go
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* [FOU-588] Build the Go module graph of a go.work workspace
vet built no module graph for a module that a go.work workspace uses,
because the go command builds such a module with the build list of the
workspace, and no single go.mod holds it. So each Go finding of a
workspace stayed unknown with no graph. vet itself is such a workspace.
vet now passes the go.work that it finds to modgraph, which gives the
build list of the workspace. Another module of the workspace is local
code, so it passes its imports on. A module that only the workspace adds
is no package of this go.mod, and it passes its imports on too. A
reached module that go.mod requires and that maps to no package still
gives no graph. A relative GOWORK gives no graph, because the go command
refuses it.
safedep/code is pinned to the head of its branch claude/go-work-graph.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
* [FOU-588] Pin safedep/code to the fixed head of claude/go-work-graph
A review of safedep/code#56 found six inputs where the build list of a
workspace differed from the go command. The fixed head follows
readModGraph and the vendor rules of the go command.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
---------
Co-authored-by: Claude <noreply@anthropic.com>
abhisek
pushed a commit
to safedep/vet
that referenced
this pull request
Oct 24, 2026
safedep/code#56 merged, so vet no longer needs the head of its branch.
The head of main holds the same tree as the reviewed branch head,
fe48e4f, which also makes the paths of Discover absolute.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
…pace (#842)
* [FOU-586] Read the Go module graph of a go.mod from the code on the disk
A go.mod lists the modules of a build, but not which module imports
which. So each Go vulnerability finding of a module that the code does
not import stayed unknown with the cause no-graph. vet could not say
unused or imported via X, and could not prove not-called.
The codeusage enricher now builds the graph of each go.mod with
safedep/code modgraph. modgraph reads the import blocks of the Go files
of the main module and of each module of the build list in vendor, in a
local replacement inside the target or in the module cache. It runs no
go command and downloads nothing. The engine asks a new
plugin.Grapher for the graph of a manifest with none, during the
extraction, and stores it with the manifest.
A module with no source on the disk is open: it may import any module.
model.Graph keeps the open nodes, and the scan file stores them. The
reach rules read them: a path of known edges gives imported via X, a
path that only an open module gives is unknown with the cause
no-dependency-source, and no path is unused. One diagnostic counts the
open modules and says to run go mod download.
Scalibr lists the target of a replace directive in place of the module.
The go.mod extractor now records the module that it replaces, as
Package.Replaces. The code usage and the graph map a replaced module by
it, so its imports count.
vet builds no graph for a module that a go.work uses, or for a go.mod
below go 1.17. Its findings keep no-graph.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
* [FOU-586] Take imports from the roots of the Go module graph
A review of the Go module graph found false unused results. The reach
rules took the imported packages from the code usage, which covers the
whole target and skips the build, target and dist directories. So a
module that only a skipped directory imports read as unused. A module
that only another go.mod of the target imports gave paths into this
go.mod. The standard library has no import path, so it read as unused.
The module graph of a go.mod now marks itself as a graph of imports, and
the scan file keeps the mark. For such a graph the reach rules take the
imported packages from its roots, which are the imports of the code of
that module. The standard library is always imported.
A reached module that maps to no package of the manifest hid its
imports, for example when two replace directives name one target. Now
that module gives no graph. vet also reads GOWORK as the go command
does.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
* [FOU-586] Resolve links in GOWORK and refuse a relative GOWORK
A review found two inputs that gave a module graph for a module of a
workspace. vet compared a use path in the spelling of GOWORK with the
canonical scan root, so a GOWORK through a link never matched the module.
On macOS each target under /tmp or /var is such a link. vet also read a
relative GOWORK from its own directory, but the go command refuses a
relative GOWORK.
vet now resolves the links of both paths before it compares them. A
relative GOWORK counts as a workspace that holds the module, so the
module gets no graph. The docs say that vet does not read a GOWORK
that go env -w sets.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
* [FOU-586] Find a go.work above the scan root and bump codeusage
The search for a go.work stopped at the scan root. The go command
searches each parent directory, so a scan of one module of a workspace
missed the workspace and built a graph from go.mod alone. That graph can
give a false unused. The search now goes up to the root of the file
system. A go.work outside the scan root is named by its full path.
The mapping of a replaced Go module changed the data of the codeusage
enricher, so its Version goes from 11 to 12.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
* [FOU-586] docs: Say that the module graph runs no build
The doc comment of Graph said that it runs no go command. To find the
module cache, vet can run go env once for each process. The comment now
says that the graph runs no build and downloads nothing, as
docs/output.md says.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
* [FOU-586] Pin safedep/code to the head of main
safedep/code#54 merged, so vet no longer needs the head of its branch.
The pin moves to the head of main, which holds the same tree.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
* [FOU-588] Build the Go module graph of a go.work workspace (#843)
* [FOU-588] Build the Go module graph of a go.work workspace
vet built no module graph for a module that a go.work workspace uses,
because the go command builds such a module with the build list of the
workspace, and no single go.mod holds it. So each Go finding of a
workspace stayed unknown with no graph. vet itself is such a workspace.
vet now passes the go.work that it finds to modgraph, which gives the
build list of the workspace. Another module of the workspace is local
code, so it passes its imports on. A module that only the workspace adds
is no package of this go.mod, and it passes its imports on too. A
reached module that go.mod requires and that maps to no package still
gives no graph. A relative GOWORK gives no graph, because the go command
refuses it.
safedep/code is pinned to the head of its branch claude/go-work-graph.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
* [FOU-588] Pin safedep/code to the fixed head of claude/go-work-graph
A review of safedep/code#56 found six inputs where the build list of a
workspace differed from the go command. The fixed head follows
readModGraph and the vendor rules of the go command.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
---------
Co-authored-by: Claude <noreply@anthropic.com>
* [FOU-588] Pin safedep/code to the head of main
safedep/code#56 merged, so vet no longer needs the head of its branch.
The head of main holds the same tree as the reviewed branch head,
fe48e4f, which also makes the paths of Discover absolute.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
* [FOU-588] Add an acceptance script for a workspace with no graph
docs/output.md says that vet builds no module graph for a workspace
whose build list it cannot know, and that its findings keep unknown with
the cause no-graph. No acceptance script held that guarantee. The new
script covers a go.mod of the build list that is not on the disk, a
workspace module outside the target, and an exclude directive.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PFQbqPqd9xn1fT6hBsyoUm
---------
Co-authored-by: Claude <noreply@anthropic.com>
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Summary
A caller kept no module graph for a module that a
go.workworkspace uses. The go command builds such a module with the build list of the workspace, which no singlego.modholds. So a graph of onego.modcould miss an edge. vet keepsunknown · no graphfor each Go finding of a workspace today, and vet itself is a workspace.DiscoverOptions.Worknames thego.workfile.Discoverthen gives the build list of the workspace for the module inDir:The build list follows
readModGraphof the go command in workspace mode:go.modof each such requirement.go.modbelow go 1.17, a workspace module too, adds eachgo.moddown the chain.go.modof the selected version joins the graph.A requirement on a workspace module at a version reads the
go.modof that version. The build uses the code of the workspace.Each other workspace module is a local source, read inside
LocalRoot.The
replacedirectives ofgo.workwin. Two workspace modules that replace one module with other code makeDiscoverfail.Vendor mode follows the go command:
go.workgo.worksays go 1.14 or latermodules.txtholds the## workspaceannotationEach listed module then comes from
vendor. Outside a workspace,Discoverreads no vendor directory of a workspace.modules.txtis read as modload reads it: a module enters the list only from a header with package lines.Discoverfails when it cannot know the build list, because a wrong version can hide an edge. That happens when:go.modthat the graph needs is not on the diskLocalRootgo.modhas anexcludedirectiveexamples/modgraphgets a-workflag.docs/modgraph.mdhas a Workspaces section.Verification
TestDiscoverGivesTheBuildListOfTheGoCommandserves synthetic modules from a proxy on the disk. It runsgo mod downloadandgo list -m all, and compares the result withDiscoverfor workspaces where the versions of two modules differ. It needs no network.TestBuildHoldsEachEdgeOfGoListInAWorkspaceputs this repository in a workspace with a probe module. For each workspace module, it compares each version withgo list -m alland each edge withgo list -deps -teston four platforms.MODGRAPH_ORACLE_DIRSwith ago.workgets the same check.go list -m allmatchesgo listedges (linux/amd64).and./scripts)A Fable sub-agent reviewed the first commit against the modload source and ran the real go command on synthetic workspaces. It found six inputs with a wrong version or source:
modules.txtThe second commit fixes each one, and the tests above fail on the first commit.
go test ./...,go vet ./...andgolangci-lint run ./...pass.Next
The vet pull request passes the
go.workthat vet finds toDiscover. A module that only the workspace adds, or another workspace module, then passes its imports on. On vet itself, the 12 Go findings that readunknown · no graphbecomeimported. It is pushed on safedep/vetclaude/go-work-graph, with safedep/code pinned to this branch.Generated by Claude Code
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