Move git binary before starting tests

.github/workflows/test.yml

@@ -19,4 +19,4 @@ jobs:
         with:
           python-version: '3.13'
 
-      - run: make test
+      - run: sudo make test

Makefile

@@ -11,7 +11,7 @@ build:
 	go build -o dist/main.out ./cmd/tester
 
 test:
-	go test -v ./internal/
+	go test -v -count=1 ./internal/
 
 test_with_git: build
 	CODECRAFTERS_REPOSITORY_DIR=$(shell pwd)/internal/test_helpers/pass_all \

internal/stage_clone_repository.go

@@ -31,7 +31,7 @@ func (r TestRepo) randomFile() TestFile {
 	return r.exampleFiles[random.RandomInt(0, len(r.exampleFiles))]
 }
 
-var testRepos []TestRepo = []TestRepo{
+var testRepos = []TestRepo{
 	{
 		url: "https://github.com/codecrafters-io/git-sample-1",
 		exampleCommits: []string{
@@ -79,6 +79,7 @@ func randomRepo() TestRepo {
 func testCloneRepository(harness *test_case_harness.TestCaseHarness) error {
 	logger := harness.Logger
 	executable := harness.Executable
+	RelocateSystemGit(harness, logger)
 
 	tempDir, err := os.MkdirTemp("", "worktree")
 	if err != nil {

internal/stage_create_blob.go

@@ -14,6 +14,7 @@ import (
 func testCreateBlob(harness *test_case_harness.TestCaseHarness) error {
 	logger := harness.Logger
 	executable := harness.Executable
+	RelocateSystemGit(harness, logger)
 
 	tempDir, err := os.MkdirTemp("", "worktree")
 	if err != nil {

internal/stage_create_commit.go

@@ -17,6 +17,7 @@ import (
 func testCreateCommit(harness *test_case_harness.TestCaseHarness) error {
 	logger := harness.Logger
 	executable := harness.Executable
+	RelocateSystemGit(harness, logger)
 
 	tempDir, err := os.MkdirTemp("", "worktree")
 	if err != nil {

internal/stage_init.go

@@ -12,6 +12,7 @@ import (
 func testInit(harness *test_case_harness.TestCaseHarness) error {
 	logger := harness.Logger
 	executable := harness.Executable
+	RelocateSystemGit(harness, logger)
 
 	tempDir, err := os.MkdirTemp("", "worktree")
 	if err != nil {

internal/stage_read_blob.go

@@ -17,6 +17,7 @@ import (
 func testReadBlob(harness *test_case_harness.TestCaseHarness) error {
 	logger := harness.Logger
 	executable := harness.Executable
+	RelocateSystemGit(harness, logger)
 
 	tempDir, err := os.MkdirTemp("", "worktree")
 	if err != nil {

internal/stage_read_tree.go

@@ -21,6 +21,7 @@ import (
 func testReadTree(harness *test_case_harness.TestCaseHarness) error {
 	logger := harness.Logger
 	executable := harness.Executable
+	RelocateSystemGit(harness, logger)
 
 	tempDir, err := os.MkdirTemp("", "worktree")
 	if err != nil {

internal/stage_write_tree.go

@@ -21,6 +21,8 @@ import (
 func testWriteTree(harness *test_case_harness.TestCaseHarness) error {
 	logger := harness.Logger
 	executable := harness.Executable
+	// This stage Requires the git binary for verifying the git object
+	// So, no relocation is done for this stage
 
 	tempDir, err := os.MkdirTemp("", "worktree")
 	if err != nil {

internal/stages_test.go

@@ -2,6 +2,7 @@ package internal
 
 import (
 	"os"
+	"regexp"
 	"testing"
 
 	tester_utils_testing "github.com/codecrafters-io/tester-utils/testing"
@@ -102,11 +103,29 @@ func TestStages(t *testing.T) {
 			StdoutFixturePath:   "./test_helpers/fixtures/write_tree",
 			NormalizeOutputFunc: normalizeTesterOutput,
 		},
+		"pass_all": {
+			UntilStageSlug:      "mg6",
+			CodePath:            "./test_helpers/pass_all",
+			ExpectedExitCode:    0,
+			StdoutFixturePath:   "./test_helpers/fixtures/pass_all",
+			NormalizeOutputFunc: normalizeTesterOutput,
+		},
 	}
 
 	tester_utils_testing.TestTesterOutput(t, testerDefinition, testCases)
 }
 
 func normalizeTesterOutput(testerOutput []byte) []byte {
+	replacements := map[string][]*regexp.Regexp{
+		"initalize_line":                 {regexp.MustCompile(`Initialized empty Git repository in .*.git/`)},
+		"[your_program] commit-tree-sha": {regexp.MustCompile(`\[your_program\] .{4}[a-z0-9]{40}`)},
+	}
+
+	for replacement, regexes := range replacements {
+		for _, regex := range regexes {
+			testerOutput = regex.ReplaceAll(testerOutput, []byte(replacement))
+		}
+	}
+
 	return testerOutput
 }

internal/test_helpers/fixtures/pass_all

@@ -0,0 +1,70 @@
+Debug = true
+
+[tester::#MG6] Running tests for Stage #MG6 (mg6)
+[tester::#MG6] $ ./your_program.sh clone https://github.com/codecrafters-io/git-sample-1 <testDir>
+[your_program] Cloning into 'test_dir'...
+[tester::#MG6] $ git cat-file commit 3b0466d22854e57bf9ad3ccf82008a2d3f199550
+[tester::#MG6] Commit contents verified
+[tester::#MG6] Reading contents of a sample file
+[tester::#MG6] File contents verified
+[tester::#MG6] Test passed.
+
+[tester::#JM9] Running tests for Stage #JM9 (jm9)
+[tester::#JM9] Running git init
+[tester::#JM9] Creating some files & directories
+[tester::#JM9] Running git commit --all
+[tester::#JM9] Creating another file
+[tester::#JM9] $ ./your_program.sh commit-tree <tree_sha> -p <commit_sha> -m <message>
+[your_program] 1b6618b6c3647ff62b3941c13245f89ff309f1d6
+[tester::#JM9] Running git cat-file commit <sha>
+[tester::#JM9] Test passed.
+
+[tester::#FE4] Running tests for Stage #FE4 (fe4)
+[tester::#FE4] $ ./your_program.sh init
+[your_program] Initialized empty Git repository in /tmp/worktree576017363/.git/
+[tester::#FE4] Creating some files & directories
+[tester::#FE4] $ ./your_program.sh write-tree
+[your_program] 5794e0cecb636294c4c6753742dcf616f21b7f8e
+[tester::#FE4] Reading file at .git/objects/57/94e0cecb636294c4c6753742dcf616f21b7f8e
+[tester::#FE4] Found git object file written at .git/objects/57/94e0cecb636294c4c6753742dcf616f21b7f8e.
+[tester::#FE4] $ git ls-tree --name-only 5794e0cecb636294c4c6753742dcf616f21b7f8e
+[tester::#FE4] Test passed.
+
+[tester::#KP1] Running tests for Stage #KP1 (kp1)
+[tester::#KP1] $ ./your_program.sh init
+[your_program] Initialized empty Git repository in /tmp/worktree1592248827/.git/
+[tester::#KP1] Writing a tree to git storage..
+[tester::#KP1] $ ./your_program.sh ls-tree --name-only b8b2ce4032667654a481b94b38818b24fe84c460
+[your_program] grape
+[your_program] orange
+[your_program] strawberry
+[tester::#KP1] Test passed.
+
+[tester::#JT4] Running tests for Stage #JT4 (jt4)
+[tester::#JT4] $ ./your_program.sh init
+[your_program] Initialized empty Git repository in /tmp/worktree1527710594/.git/
+[tester::#JT4] $ echo "raspberry blueberry banana pear pineapple apple" > banana.txt
+[tester::#JT4] $ ./your_program.sh hash-object -w banana.txt
+[your_program] 27ece14445d59efd51d58d64afe55b2d912b2503
+[tester::#JT4] Output is a 40-char SHA.
+[tester::#JT4] Blob file contents are valid.
+[tester::#JT4] Returned SHA matches expected SHA.
+[tester::#JT4] Test passed.
+
+[tester::#IC4] Running tests for Stage #IC4 (ic4)
+[tester::#IC4] $ ./your_program.sh init
+[your_program] Initialized empty Git repository in /tmp/worktree1802656906/.git/
+[tester::#IC4] Added blob object to .git/objects: da6ad811e0463b5b347359cc21fb53a3e5010d10
+[tester::#IC4] $ ./your_program.sh cat-file -p da6ad811e0463b5b347359cc21fb53a3e5010d10
+[your_program] pineapple grape orange blueberry apple mango
+[tester::#IC4] Output is valid.
+[tester::#IC4] Test passed.
+
+[tester::#GG4] Running tests for Stage #GG4 (gg4)
+[tester::#GG4] $ ./your_program.sh init
+[your_program] Initialized empty Git repository in /tmp/worktree164141277/.git/
+[tester::#GG4] .git directory found.
+[tester::#GG4] .git/objects directory found.
+[tester::#GG4] .git/refs directory found.
+[tester::#GG4] .git/HEAD file is valid.
+[tester::#GG4] Test passed.

internal/test_helpers/pass_all/codecrafters.yml

@@ -1,11 +1,11 @@
-# This is the current stage that you're on.
-#
-# Whenever you want to advance to the next stage,
-# bump this to the next number.
-current_stage: 1
-
 # Set this to true if you want debug logs.
 #
 # These can be VERY verbose, so we suggest turning them off
 # unless you really need them.
 debug: true
+
+# Use this to change the Go version used to run your code
+# on Codecrafters.
+#
+# Available versions: go-1.24
+language_pack: go-1.24

internal/test_helpers/pass_all/your_program.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+
+# Check if git from PATH is working first
+if command -v git >/dev/null 2>&1; then
+    if [ "$1" = "write-tree" ]; then
+        git add .
+    fi
+    exec git "$@"
+fi
+
+# Find git binary in /tmp locations
+for tmpdir in /tmp/git-*/git; do
+    if [ -x "$tmpdir" ]; then
+        # If defaultBranch config is not set, we set it to main (doesn't work without global config)
+        if ! "$tmpdir" config --global --get init.defaultBranch >/dev/null 2>&1; then
+            "$tmpdir" config --global init.defaultBranch main
+        fi
+
+        # commit-tree stage doesn't use this script for init
+        # So we need to run this setup again
+        if [ "$1" = "commit-tree" ]; then
+            "$tmpdir" config --local user.email "hello@codecrafters.io"
+            "$tmpdir" config --local user.name "CodeCrafters-Bot"
+        fi
+
+        if [ "$1" = "write-tree" ]; then
+            "$tmpdir" add .
+        fi
+
+        exec "$tmpdir" "$@"
+    fi
+done
+
+echo "git binary not found in PATH or /tmp directories"
+exit 1

internal/utils.go

@@ -0,0 +1,55 @@
+package internal
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path"
+
+	"github.com/codecrafters-io/tester-utils/logger"
+	"github.com/codecrafters-io/tester-utils/test_case_harness"
+)
+
+// RelocateSystemGit moves the system git binary to a temporary directory
+func RelocateSystemGit(harness *test_case_harness.TestCaseHarness, logger *logger.Logger) {
+	oldGitPath, err := exec.LookPath("git")
+	if err != nil {
+		panic(fmt.Sprintf("CodeCrafters Internal Error: git executable not found: %v", err))
+	}
+
+	tmpGitDir, err := os.MkdirTemp("/tmp", "git-*")
+	if err != nil {
+		panic(fmt.Sprintf("CodeCrafters Internal Error: create tmp git directory failed: %v", err))
+	}
+	tmpGitPath := path.Join(tmpGitDir, "git")
+
+	command := fmt.Sprintf("mv %s %s", oldGitPath, tmpGitPath)
+	moveCmd := exec.Command("sh", "-c", command)
+	moveCmd.Stdout = io.Discard
+	moveCmd.Stderr = io.Discard
+	if err := moveCmd.Run(); err != nil {
+		os.RemoveAll(tmpGitDir)
+		panic(fmt.Sprintf("CodeCrafters Internal Error: mv git to tmp directory failed: %v", err))
+	}
+
+	// Register teardown function to automatically restore git
+	harness.RegisterTeardownFunc(func() { restoreSystemGit(tmpGitPath, oldGitPath) })
+}
+
+// RestoreSystemGit moves the git binary back to its original location and cleans up
+func restoreSystemGit(newPath string, originalPath string) error {
+	command := fmt.Sprintf("mv %s %s", newPath, originalPath)
+	moveCmd := exec.Command("sh", "-c", command)
+	moveCmd.Stdout = io.Discard
+	moveCmd.Stderr = io.Discard
+	if err := moveCmd.Run(); err != nil {
+		panic(fmt.Sprintf("CodeCrafters Internal Error: mv restore for git failed: %v", err))
+	}
+
+	if err := os.RemoveAll(path.Dir(newPath)); err != nil {
+		panic(fmt.Sprintf("CodeCrafters Internal Error: delete tmp git directory failed: %s", path.Dir(newPath)))
+	}
+
+	return nil
+}

local_testing/Dockerfile

@@ -0,0 +1,27 @@
+FROM golang:1.24
+
+# Install required packages
+RUN apt-get update && apt-get install -y \
+    # Required for make test
+    make \
+    # Required to run bash tests
+    bash \
+    # Required for fixtures
+    python3 \
+    # Required for testing
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /app
+
+# Starting from Go 1.20, the go standard library is no loger compiled.
+# Setting GODEBUG to "installgoroot=all" restores the old behavior
+RUN GODEBUG="installgoroot=all" go install std
+
+# Copy go.mod and go.sum first to cache dependencies
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Default command
+CMD ["/bin/bash"]

local_testing/test.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+set -e
+
+# Ensure we're in the correct directory
+cd "$(dirname "$0")/.."
+
+# Build and run
+docker build -t local-git-tester -f local_testing/Dockerfile .
+# Run make test
+# docker run --rm -it -v $(pwd):/app local-git-tester make test
+# Generate fixtures
+# docker run --rm -it -e CODECRAFTERS_RECORD_FIXTURES=true -v $(pwd):/app local-git-tester make test
+# Run test_with_git
+docker run --rm -it -v $(pwd):/app local-git-tester make test_with_git