Proof of concept!

go.mod

@@ -0,0 +1,5 @@
+module github.com/MarioCarrion/versions
+
+go 1.13
+
+require golang.org/x/mod v0.2.0

go.sum

@@ -0,0 +1,14 @@
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/mod v0.2.0 h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
+golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898 h1:/atklqdjdhuosWIl6AIbOeHJjicWYPqR9bpxqxYG2pA=
+golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

main.go

@@ -0,0 +1,164 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"sort"
+
+	"golang.org/x/mod/modfile"
+)
+
+type (
+	Table struct {
+		Modules  []string
+		Versions []string
+		Packages map[string][]Module // key is "Package Name"
+	}
+
+	Module struct {
+		// Path            string
+		Version         string
+		IsIndirect      bool
+		ReplacedPath    string
+		ReplacedVersion string
+	}
+)
+
+func main() {
+	parse := func(file string) *modfile.File {
+		data, err := ioutil.ReadFile(file)
+		if err != nil {
+			log.Fatalf("ioutil %s", err)
+		}
+
+		f, err := modfile.Parse(file, data, nil)
+		if err != nil {
+			log.Fatalf("log %s", err)
+		}
+		return f
+	}
+
+	files := []string{
+		"repo1/go.mod",
+		"repo2/go.mod",
+		"repo2/go.mod",
+	}
+
+	sort.Strings(files)
+
+	parsed := make([]*modfile.File, len(files))
+	for i, f := range files {
+		parsed[i] = parse(f)
+	}
+
+	table := Table{}
+	table.Modules = make([]string, len(files))
+	table.Versions = make([]string, len(files))
+	table.Packages = make(map[string][]Module)
+
+	//-
+
+	for i, file := range parsed {
+		table.Modules[i] = file.Module.Mod.Path
+		table.Versions[i] = file.Go.Version
+
+		for _, req := range file.Require {
+			pkg := req.Mod.Path
+
+			var modules []Module
+			if modules = table.Packages[pkg]; modules == nil {
+				modules = make([]Module, len(parsed))
+			}
+
+			modules[i].Version = req.Mod.Version
+			modules[i].IsIndirect = req.Indirect
+
+			table.Packages[pkg] = modules
+		}
+
+		for _, rep := range file.Replace {
+			old, ok := table.Packages[rep.Old.Path]
+			if !ok {
+				continue
+			}
+
+			old[i].ReplacedPath = rep.New.Path
+			old[i].ReplacedVersion = rep.New.Version
+			table.Packages[rep.Old.Path] = old
+		}
+	}
+
+	//-
+
+	line0 := "|"
+	line1 := "|---"
+	line2 := "| Go version |"
+
+	for i, name := range table.Modules {
+		line0 = fmt.Sprintf("%s | %s ", line0, string(name))
+		line1 = fmt.Sprintf("%s | :---: ", line1)
+		line2 = fmt.Sprintf("%s | %s ", line2, table.Versions[i])
+	}
+
+	fmt.Printf("%s |\n", line0)
+	fmt.Printf("%s |\n", line1)
+	fmt.Printf("%s |\n", line2)
+
+	sortedpkgs := make([]string, len(table.Packages))
+
+	var index int
+	for k, _ := range table.Packages {
+		sortedpkgs[index] = k
+		index++
+	}
+
+	sort.Strings(sortedpkgs)
+
+	//-
+
+	for _, pkg := range sortedpkgs {
+		v := table.Packages[pkg]
+
+		var line, lastversion string
+
+		same := true
+
+		for _, p := range v {
+			var version string
+			if p.ReplacedVersion != "" {
+				version = p.ReplacedVersion
+			} else {
+				version = p.Version
+			}
+
+			if lastversion == "" {
+				lastversion = version
+			}
+
+			if same && lastversion != version {
+				same = false
+			}
+
+			line = fmt.Sprintf("%s %s ", line, version)
+			if p.IsIndirect {
+				line = fmt.Sprintf("%s :question: ", line)
+			}
+			if p.ReplacedVersion != "" {
+				line = fmt.Sprintf("%s :exclamation: ", line)
+			}
+
+			line = fmt.Sprintf("%s | ", line)
+		}
+
+		var prefix string
+		if same {
+			prefix = fmt.Sprintf(":white_check_mark: %s", pkg)
+		} else {
+			prefix = pkg
+		}
+
+		line = fmt.Sprintf("| %s | %s |\n", prefix, line)
+		fmt.Printf(line)
+	}
+}