feat: profiles for legacy-cid-v0 test-cid-v1

config/profile.go

@@ -204,6 +204,28 @@ fetching may be degraded.
 			return nil
 		},
 	},
+	"legacy-cid-v0": {
+		Description: `Makes UnixFS import produce legacy CIDv0 with no raw leaves, sha2-256 and 256 KiB chunks.`,
+
+		Transform: func(c *Config) error {
+			c.Import.CidVersion = *NewOptionalInteger(0)
+			c.Import.UnixFSRawLeaves = False
+			c.Import.UnixFSChunker = *NewOptionalString("size-262144")
+			c.Import.HashFunction = *NewOptionalString("sha2-256")
+			return nil
+		},
+	},
+	"test-cid-v1": {
+		Description: `Makes UnixFS import produce modern CIDv1 with raw leaves, sha2-256 and 1 MiB chunks.`,
+
+		Transform: func(c *Config) error {
+			c.Import.CidVersion = *NewOptionalInteger(1)
+			c.Import.UnixFSRawLeaves = True
+			c.Import.UnixFSChunker = *NewOptionalString("size-1048576")
+			c.Import.HashFunction = *NewOptionalString("sha2-256")
+			return nil
+		},
+	},
 }
 
 func getAvailablePort() (port int, err error) {

docs/changelogs/v0.29.md

@@ -13,9 +13,15 @@
 
 ### 🔦 Highlights
 
-#### Global configuration for data ingestion
+#### Customizing `ipfs add` defaults
 
-A new configuration section, `Import`, was introduced. This section allows to override the default values of options used across several commands that do data ingestion. Read more in the [config documentation](../config.md).
+This release supports overriding global data ingestion defaults used by commands like `ipfs iadd` via user-defined [`Import.*` configuration options](../config.md#import).
+The hash function, CID version, or UnixFS raw leaves and chunker behaviors can be set once, and used as the new implicit default for `ipfs add`.
+
+> [!TIP]
+> As a convenience, two CID [profiles](../config.md#profile) are provided: `legacy-cid-v0` and `test-cid-v1`.
+> A test profile that defaults to modern CIDv1 can be applied via `ipfs config profile apply test-cid-v1`.
+> We encourage users to test it and report any issues.
 
 ### 📝 Changelog
 

docs/config.md

@@ -270,6 +270,21 @@ documented in `ipfs config profile --help`.
 
   Use this profile with caution.
 
+- `legacy-cid-v0`
+
+  Makes UnixFS import (`ipfs add`) produce legacy CIDv0 with no raw leaves, sha2-256 and 256 KiB chunks.
+
+  > [!WARNING]
+  > This profile is provided for legacy users and should not be used for new projects.
+
+- `test-cid-v1`
+
+  Makes UnixFS import (`ipfs add`) produce modern CIDv1 with raw leaves, sha2-256 and 1 MiB chunks.
+
+  > [!NOTE]
+  > This profile will become the new implicit default, provided for testing purposes.
+  > Follow [kubo#4143](https://github.com/ipfs/kubo/issues/4143) for more details.
+
 ## Types
 
 This document refers to the standard JSON types (e.g., `null`, `string`,
@@ -2401,7 +2416,7 @@ Type: `optionalInteger`
 
 The default UnixFS raw leaves option. Commands affected: `ipfs add`, `ipfs files write`.
 
-Default: `false`
+Default: `false` if `CidVersion=0`; `true` if `CidVersion=1`
 
 Type: `flag`
 
@@ -2413,7 +2428,6 @@ Default: `size-262144`
 
 Type: `optionalString`
 
-
 ### `Import.HashFunction`
 
 The default hash function. Commands affected: `ipfs add`, `ipfs block put`, `ipfs dag put`.

test/cli/add_test.go

@@ -95,4 +95,24 @@ func TestAdd(t *testing.T) {
 		cidStr := node.IPFSAddStr(shortString)
 		require.Equal(t, shortStringCidV1NoRawLeaves, cidStr)
 	})
+
+	t.Run("ipfs init --profile=legacy-cid-v0 sets config that produces legacy CIDv0", func(t *testing.T) {
+		t.Parallel()
+		node := harness.NewT(t).NewNode().Init("--profile=legacy-cid-v0")
+		node.StartDaemon()
+		defer node.StopDaemon()
+
+		cidStr := node.IPFSAddStr(shortString)
+		require.Equal(t, shortStringCidV0, cidStr)
+	})
+
+	t.Run("ipfs init --profile=test-cid-v1 produces modern CIDv1", func(t *testing.T) {
+		t.Parallel()
+		node := harness.NewT(t).NewNode().Init("--profile=test-cid-v1")
+		node.StartDaemon()
+		defer node.StopDaemon()
+
+		cidStr := node.IPFSAddStr(shortString)
+		require.Equal(t, shortStringCidV1, cidStr)
+	})
 }