Display diff of lock file during dry-run

cmd/dep/ensure.go

@@ -161,7 +161,8 @@ func (cmd *ensureCommand) Run(ctx *dep.Ctx, args []string) error {
 		manifest = p.Manifest
 	}
 
-	sw.Prepare(manifest, p.Lock, solution, writeV)
+	newLock := dep.LockFromInterface(solution)
+	sw.Prepare(manifest, p.Lock, newLock, writeV)
 	if cmd.dryRun {
 		return sw.PrintPreparedActions()
 	}

cmd/dep/remove.go

@@ -180,7 +180,8 @@ func (cmd *removeCommand) Run(ctx *dep.Ctx, args []string) error {
 	}
 
 	var sw dep.SafeWriter
-	sw.Prepare(p.Manifest, p.Lock, soln, false)
+	newLock := dep.LockFromInterface(soln)
+	sw.Prepare(p.Manifest, p.Lock, newLock, false)
 	if err := sw.Write(p.AbsRoot, sm); err != nil {
 		return errors.Wrap(err, "grouped write of manifest, lock and vendor")
 	}

lock.go

@@ -184,14 +184,3 @@ func (s SortedLockedProjects) Less(i, j int) bool {
 
 	return l.Source < r.Source
 }
-
-// locksAreEquivalent compares two locks to see if they differ. If EITHER lock
-// is nil, or their memos do not match, or any projects differ, then false is
-// returned.
-func locksAreEquivalent(l, r *Lock) bool {
-	if l == nil || r == nil {
-		return false
-	}
-
-	return gps.LocksAreEq(l, r, true)
-}

test_project_context_test.go

@@ -96,8 +96,7 @@ func (pc *TestProjectContext) getVendorPath() string {
 // Updates the golden file when -UpdateGolden flag is present.
 func (pc *TestProjectContext) LockShouldMatchGolden(goldenLockPath string) error {
 	got := pc.h.ReadLock()
-	want := pc.h.GetTestFileString(goldenLockPath)
-	return pc.shouldMatchGolden(goldenLockPath, want, got)
+	return pc.ShouldMatchGolden(goldenLockPath, got)
 }
 
 // LockShouldNotExist returns an error when the lock exists.
@@ -110,8 +109,7 @@ func (pc *TestProjectContext) LockShouldNotExist() error {
 // Updates the golden file when -UpdateGolden flag is present
 func (pc *TestProjectContext) ManifestShouldMatchGolden(goldenManifestPath string) error {
 	got := pc.h.ReadManifest()
-	want := pc.h.GetTestFileString(goldenManifestPath)
-	return pc.shouldMatchGolden(goldenManifestPath, want, got)
+	return pc.ShouldMatchGolden(goldenManifestPath, got)
 }
 
 // ManifestShouldNotExist returns an error when the lock exists.
@@ -122,7 +120,8 @@ func (pc *TestProjectContext) ManifestShouldNotExist() error {
 // ShouldMatchGolden returns an error when a file does not match the golden file.
 // goldenFile is the path to the golden file, relative to the testdata directory
 // Updates the golden file when -UpdateGolden flag is present
-func (pc *TestProjectContext) shouldMatchGolden(goldenFile string, want string, got string) error {
+func (pc *TestProjectContext) ShouldMatchGolden(goldenFile string, got string) error {
+	want := pc.h.GetTestFileString(goldenFile)
 	if want != got {
 		if *test.UpdateGolden {
 			if err := pc.h.WriteTestFile(goldenFile, got); err != nil {

testdata/txn_writer/expected_diff_output.txt

@@ -0,0 +1,26 @@
+Add: [
+    {
+        "name": "github.com/stuff/realthing",
+        "version": "2.0.0",
+        "revision": "1f02e52d6bac308da54ab84a234c58a98ca82347",
+        "packages": [
+            "."
+        ]
+    }
+]
+Remove: [
+    "github.com/stuff/placeholder"
+]
+Modify: [
+    {
+        "name": "github.com/foo/bar",
+        "repo": "+ http://github.example.com/foo/bar",
+        "version": "+ 1.2.0",
+        "branch": "- master",
+        "revision": "f24338400f072ef18125ae0fbe6b06fe6d1783e7 -> 2a3a211e171803acb82d1d5d42ceb53228f51751",
+        "packages": [
+            "- placeholder",
+            "+ thing"
+        ]
+    }
+]

testdata/txn_writer/original_lock.json

@@ -0,0 +1,22 @@
+{
+  "memo": "595716d270828e763c811ef79c9c41f85b1d1bfbdfe85280036405c03772206c",
+  "projects": [
+    {
+      "name": "github.com/foo/bar",
+      "branch": "master",
+      "revision": "f24338400f072ef18125ae0fbe6b06fe6d1783e7",
+      "packages": [
+        "placeholder",
+        "util"
+      ]
+    },
+    {
+      "name": "github.com/stuff/placeholder",
+      "version": "2.0.0",
+      "revision": "6694017eeb4e20fd277b049bf29dba4895c97234",
+      "packages": [
+        "."
+      ]
+    }
+  ]
+}

testdata/txn_writer/updated_lock.json

@@ -0,0 +1,23 @@
+{
+  "memo": "2252a285ab27944a4d7adcba8dbd03980f59ba652f12db39fa93b927c345593e",
+  "projects": [
+    {
+      "name": "github.com/foo/bar",
+      "repo": "http://github.example.com/foo/bar",
+      "version": "1.2.0",
+      "revision": "2a3a211e171803acb82d1d5d42ceb53228f51751",
+      "packages": [
+        "thing",
+        "util"
+      ]
+    },
+    {
+      "name": "github.com/stuff/realthing",
+      "version": "2.0.0",
+      "revision": "1f02e52d6bac308da54ab84a234c58a98ca82347",
+      "packages": [
+        "."
+      ]
+    }
+  ]
+}