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trace_internal.go
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70 lines (58 loc) · 1.78 KB
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package main
import (
"context"
"flag"
"fmt"
"strings"
"github.com/peterbourgon/ff/v3/ffcli"
"github.com/sourcegraph/sourcegraph/dev/depgraph/internal/graph"
"github.com/sourcegraph/sourcegraph/dev/depgraph/internal/visualization"
"github.com/sourcegraph/sourcegraph/lib/errors"
)
var traceInternalFlagSet = flag.NewFlagSet("depgraph trace-internal", flag.ExitOnError)
var traceInternalCommand = &ffcli.Command{
Name: "trace-internal",
ShortUsage: "depgraph trace-internal {package}",
ShortHelp: "Outputs a DOT-formatted graph of the given package's internal dependencies",
FlagSet: traceInternalFlagSet,
Exec: traceInternal,
}
func traceInternal(ctx context.Context, args []string) error {
if len(args) != 1 {
return errors.Errorf("expected exactly one package")
}
pkg := args[0]
root, err := findRoot()
if err != nil {
return err
}
graph, err := graph.Load(root)
if err != nil {
return err
}
if _, ok := graph.PackageNames[pkg]; !ok {
return errors.Newf("pkg %q not found", pkg)
}
packages, dependencyEdges := filterExternalReferences(graph, pkg)
fmt.Printf("%s\n", visualization.Dotify(packages, dependencyEdges, nil))
return nil
}
func filterExternalReferences(graph *graph.DependencyGraph, prefix string) ([]string, map[string][]string) {
packages := make([]string, 0, len(graph.Packages))
for _, pkg := range graph.Packages {
if strings.HasPrefix(pkg, prefix) {
packages = append(packages, pkg)
}
}
dependencyEdges := map[string][]string{}
for pkg, dependencies := range graph.Dependencies {
if strings.HasPrefix(pkg, prefix) {
for _, dependency := range dependencies {
if strings.HasPrefix(dependency, prefix) {
dependencyEdges[pkg] = append(dependencyEdges[pkg], dependency)
}
}
}
}
return packages, dependencyEdges
}