chore(tools): remove depot-scanner & tvlc r/5490

These are both unused things from a long time ago, which we don't need
to keep around anymore.

Their design doc has been marked as archived.

Change-Id: Icd2744e511e78ec95ec8f39e5f79ed1fe98e9e4a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7639
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>

1 files changed, 0 insertions, 227 deletions

diff --git a/tools/depot-scanner/main.go b/tools/depot-scanner/main.go
deleted file mode 100644
index 9171587be2b9..000000000000
--- a/tools/depot-scanner/main.go
+++ /dev/null
@@ -1,227 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"flag"
-	"fmt"
-	"io"
-	"os"
-	"os/exec"
-	"strings"
-
-	pb "code.tvl.fyi/tools/depot-scanner/proto"
-)
-
-var nixInstantiatePath = flag.String("nix-bin", "/run/current-system/sw/bin/nix-instantiate", "path to nix-instantiate")
-var depotRoot = flag.String("depot", envOr("DEPOT_ROOT", "/depot/"), "path to tvl.fyi depot at current canon")
-var nixStoreRoot = flag.String("store-path", "/nix/store/", "prefix for all valid nix store paths")
-
-var modeFlag = flag.String("mode", modeArchive, "operation mode. valid values: tar, print")
-var onlyFlag = flag.String("only", "", "only enable the listed output types, comma separated. valid values: DEPOT, STORE, CORE, UNKNOWN")
-var relativeFlag = flag.Bool("relpath", false, "when printing paths, print them relative to the root of their path type")
-
-const (
-	modeArchive = "tar"
-	modePrint   = "print"
-)
-
-const (
-	// String that identifies a path as belonging to nix corepkgs.
-	corePkgsString = "/share/nix/corepkgs/"
-
-	depotTraceString = "trace: depot-scan: "
-)
-
-type fileScanType int
-
-const (
-	unknownPath fileScanType = iota
-	depotPath
-	nixStorePath
-	corePkgsPath
-)
-
-func launchNix(attr string) (*exec.Cmd, io.ReadCloser, io.ReadCloser, error) {
-	cmd := exec.Command(*nixInstantiatePath, "--trace-file-access", "-A", attr)
-	stdout, err := cmd.StdoutPipe()
-	if err != nil {
-		return nil, nil, nil, err
-	}
-	stderr, err := cmd.StderrPipe()
-	if err != nil {
-		stdout.Close()
-		return nil, nil, nil, err
-	}
-
-	err = cmd.Start()
-	if err != nil {
-		stdout.Close()
-		stderr.Close()
-		return nil, nil, nil, err
-	}
-
-	return cmd, stdout, stderr, nil
-}
-
-func categorizePath(path string) fileScanType {
-	if strings.HasPrefix(path, *nixStoreRoot) {
-		if strings.Contains(path, corePkgsString) {
-			return corePkgsPath
-		}
-		return nixStorePath
-	} else if strings.HasPrefix(path, *depotRoot) {
-		return depotPath
-	} else if strings.Contains(path, corePkgsString) {
-		return corePkgsPath
-	}
-	return unknownPath
-}
-
-func addPath(path string, out map[fileScanType]map[string]struct{}) {
-	cat := categorizePath(path)
-	if out[cat] == nil {
-		out[cat] = make(map[string]struct{})
-	}
-
-	out[cat][path] = struct{}{}
-}
-
-func consumeOutput(stdout, stderr io.ReadCloser) (map[fileScanType]map[string]struct{}, string, error) {
-	result := make(map[fileScanType]map[string]struct{})
-
-	scanner := bufio.NewScanner(stderr)
-	for scanner.Scan() {
-		line := scanner.Text()
-		if strings.HasPrefix(line, depotTraceString) {
-			addPath(strings.TrimPrefix(line, depotTraceString), result)
-		} else {
-			// print remaining stderr output of nix-instantiate
-			// to prevent silent swallowing of possible important
-			// error messages (e.g. about command line interface changes)
-			fmt.Fprintf(os.Stderr, "nix-inst> %s\n", line)
-		}
-	}
-	if scanner.Err() != nil {
-		return nil, "", scanner.Err()
-	}
-
-	// Get derivation path
-	derivPath := ""
-	scanner = bufio.NewScanner(stdout)
-	for scanner.Scan() {
-		line := scanner.Text()
-		if strings.HasPrefix(line, *nixStoreRoot) {
-			derivPath = line
-			// consume the rest of the output
-		}
-	}
-	if scanner.Err() != nil {
-		return nil, "", scanner.Err()
-	}
-
-	return result, derivPath, nil
-}
-
-func main() {
-	flag.Parse()
-
-	checkDepotRoot()
-
-	enabledPathTypes := make(map[pb.PathType]bool, 4)
-	if len(*onlyFlag) > 0 {
-		enabledOutputs := strings.Split(*onlyFlag, ",")
-		for _, v := range enabledOutputs {
-			i, ok := pb.PathType_value[strings.ToUpper(v)]
-			if !ok {
-				fmt.Fprintln(os.Stderr, "warning: unrecognized PathType name: ", v)
-				continue
-			}
-			enabledPathTypes[pb.PathType(i)] = true
-		}
-	} else {
-		// Default
-		enabledPathTypes = map[pb.PathType]bool{
-			pb.PathType_UNKNOWN: true,
-			pb.PathType_DEPOT:   true,
-			pb.PathType_STORE:   true,
-			pb.PathType_CORE:    true,
-		}
-	}
-
-	cmd, stdout, stderr, err := launchNix(flag.Arg(0))
-	if err != nil {
-		panic(fmt.Errorf("could not launch nix: %w", err))
-	}
-	results, derivPath, err := consumeOutput(stdout, stderr)
-	if err != nil {
-		err2 := cmd.Wait()
-		if err2 != nil {
-			panic(fmt.Errorf("nix-instantiate failed: %w\nadditionally, while reading output: %w", err2, err))
-		}
-		panic(fmt.Errorf("problem reading nix output: %w", err))
-	}
-	err = cmd.Wait()
-	if err != nil {
-		panic(fmt.Errorf("nix-instantiate failed: %w", err))
-	}
-
-	_ = derivPath
-
-	if *modeFlag == "print" {
-		if enabledPathTypes[pb.PathType_STORE] {
-			for k, _ := range results[nixStorePath] {
-				if *relativeFlag {
-					k = strings.TrimPrefix(k, *nixStoreRoot)
-					k = strings.TrimPrefix(k, "/")
-				}
-				fmt.Println(k)
-			}
-		}
-		if enabledPathTypes[pb.PathType_DEPOT] {
-			for k, _ := range results[depotPath] {
-				if *relativeFlag {
-					k = strings.TrimPrefix(k, *depotRoot)
-					k = strings.TrimPrefix(k, "/")
-				}
-				fmt.Println(k)
-			}
-		}
-		if enabledPathTypes[pb.PathType_CORE] {
-			for k, _ := range results[corePkgsPath] {
-				// TODO relativeFlag
-				fmt.Println(k)
-			}
-		}
-		if enabledPathTypes[pb.PathType_UNKNOWN] {
-			for k, _ := range results[unknownPath] {
-				fmt.Println(k)
-			}
-		}
-	} else {
-		panic("unimplemented")
-	}
-}
-
-func envOr(envVar, def string) string {
-	v := os.Getenv(envVar)
-	if v == "" {
-		return def
-	}
-	return v
-}
-
-func checkDepotRoot() {
-	if *depotRoot == "" {
-		fmt.Fprintln(os.Stderr, "error: DEPOT_ROOT / -depot not set")
-		os.Exit(2)
-	}
-	_, err := os.Stat(*depotRoot)
-	if os.IsNotExist(err) {
-		fmt.Fprintf(os.Stderr, "error: %q does not exist\ndid you forget to set DEPOT_ROOT / --depot ?\n", *depotRoot)
-		os.Exit(1)
-	} else if err != nil {
-		fmt.Fprintf(os.Stderr, "error: could not stat %q: %v\n", *depotRoot, err)
-		os.Exit(1)
-	}
-
-}