config-patch: Inverse profiles

License: MIT
Signed-off-by: Łukasz Magiera <magik6k@gmail.com>

cmd/ipfs/init.go

@@ -165,7 +165,7 @@ func doInit(out io.Writer, repoRoot string, empty bool, nBitsForKeypair int, con
 			return fmt.Errorf("invalid configuration profile: %s", profile)
 		}
 
-		if err := transformer.Apply(conf); err != nil {
+		if err := transformer(conf); err != nil {
 			return err
 		}
 	}

core/commands/config.go

@@ -301,7 +301,6 @@ var configProfileCmd = &cmds.Command{
 
 	Subcommands: map[string]*cmds.Command{
 		"apply": configProfileApplyCmd,
-		"revert": configProfileRevertCmd,
 	},
 }
 
@@ -319,7 +318,7 @@ var configProfileApplyCmd = &cmds.Command{
 			return
 		}
 
-		err := transformConfig(req.InvocContext().ConfigRoot, "apply-"+req.Arguments()[0], profile.Apply)
+		err := transformConfig(req.InvocContext().ConfigRoot, req.Arguments()[0], profile)
 		if err != nil {
 			res.SetError(err, cmdkit.ErrNormal)
 			return
@@ -328,34 +327,7 @@ var configProfileApplyCmd = &cmds.Command{
 	},
 }
 
-var configProfileRevertCmd = &cmds.Command{
-	Helptext: cmdkit.HelpText{
-		Tagline: "Revert profile changes.",
-		ShortDescription: `Reverts profile-related changes to the default values.
-
-Reverting some profiles may damage the configuration or not be possible.
-Backing up the config before running this command is advised.`,
-	},
-	Arguments: []cmdkit.Argument{
-		cmdkit.StringArg("profile", true, false, "The profile to apply to the config."),
-	},
-	Run: func(req cmds.Request, res cmds.Response) {
-		profile, ok := config.Profiles[req.Arguments()[0]]
-		if !ok {
-			res.SetError(fmt.Errorf("%s is not a profile", req.Arguments()[0]), cmdkit.ErrNormal)
-			return
-		}
-
-		err := transformConfig(req.InvocContext().ConfigRoot, "revert-"+req.Arguments()[0], profile.Revert)
-		if err != nil {
-			res.SetError(err, cmdkit.ErrNormal)
-			return
-		}
-		res.SetOutput(nil)
-	},
-}
-
-func transformConfig(configRoot string, backupName string, transformer config.Transformer) error {
+func transformConfig(configRoot string, configName string, transformer config.Transformer) error {
 	r, err := fsrepo.Open(configRoot)
 	if err != nil {
 		return err
@@ -372,7 +344,7 @@ func transformConfig(configRoot string, backupName string, transformer config.Tr
 		return err
 	}
 
-	_, err = r.BackupConfig(backupName + "-")
+	_, err = r.BackupConfig("pre-" + configName + "-")
 	if err != nil {
 		return err
 	}

docs/config.md

@@ -7,7 +7,8 @@ on a running daemon do not read the config file at runtime.
 #### Profiles
 Configuration profiles allow to tweak configuration quickly. Profiles can be
 applied with `--profile` flag to `ipfs init` or with `ipfs config profile apply`
-command.
+command. When a profile is applied a backup of the configuration file will
+be created in $IPFS_PATH
 
 Available profiles:
 - `server`
@@ -15,12 +16,21 @@ Available profiles:
   Recommended for nodes with public IPv4 address (servers, VPSes, etc.),
   disables host and content discovery in local networks.
 
+- `local-discovery`
+
+  Sets default values to fields affected by `server` profile, enables
+  discovery in local networks.
+
 - `test`
 
   Reduces external interference, useful for running ipfs in test environments.
   Note that with these settings node won't be able to talk to the rest of the
   network without manual bootstrap.
 
+- `default-networking`
+
+  Restores default network settings. Inverse profile of the `test` profile.
+
 - `badgerds`
 
   Replaces default datastore configuration with experimental badger datastore.
@@ -28,8 +38,11 @@ Available profiles:
   datastore to the new configuration. You can do this using [ipfs-ds-convert](https://github.com/ipfs/ipfs-ds-convert)
 
   WARNING: badger datastore is experimental. Make sure to backup your data
-  frequently
+  frequently.
+
+- `default-datastore`
 
+  Restores default datastore configuration.
 
 ## Table of Contents
 

repo/config/profile.go

@@ -3,12 +3,6 @@ package config
 // Transformer is a function which takes configuration and applies some filter to it
 type Transformer func(c *Config) error
 
-// Profile applies some set of changes to the configuration
-type Profile struct {
-	Apply  Transformer
-	Revert Transformer
-}
-
 // defaultServerFilters has a list of non-routable IPv4 prefixes
 // according to http://www.iana.org/assignments/iana-ipv4-special-registry/iana-ipv4-special-registry.xhtml
 var defaultServerFilters = []string{
@@ -30,23 +24,20 @@ var defaultServerFilters = []string{
 }
 
 // Profiles is a map holding configuration transformers. Docs are in docs/config.md
-var Profiles = map[string]*Profile{
-	"server": {
-		Apply: func(c *Config) error {
+var Profiles = map[string]Transformer{
+	"server": func(c *Config) error {
 		c.Addresses.NoAnnounce = appendSingle(c.Addresses.NoAnnounce, defaultServerFilters)
 		c.Swarm.AddrFilters = appendSingle(c.Swarm.AddrFilters, defaultServerFilters)
 		c.Discovery.MDNS.Enabled = false
 		return nil
 	},
-		Revert: func(c *Config) error {
+	"local-discovery": func(c *Config) error {
 		c.Addresses.NoAnnounce = deleteEntries(c.Addresses.NoAnnounce, defaultServerFilters)
 		c.Swarm.AddrFilters = deleteEntries(c.Swarm.AddrFilters, defaultServerFilters)
 		c.Discovery.MDNS.Enabled = true
 		return nil
 	},
-	},
-	"test": {
-		Apply: func(c *Config) error {
+	"test": func(c *Config) error {
 		c.Addresses.API = "/ip4/127.0.0.1/tcp/0"
 		c.Addresses.Gateway = "/ip4/127.0.0.1/tcp/0"
 		c.Addresses.Swarm = []string{
@@ -59,16 +50,14 @@ var Profiles = map[string]*Profile{
 		c.Discovery.MDNS.Enabled = false
 		return nil
 	},
-		Revert: func(c *Config) error {
+	"default-networking": func(c *Config) error {
 		c.Addresses = addressesConfig()
 
 		c.Swarm.DisableNatPortMap = false
 		c.Discovery.MDNS.Enabled = true
 		return nil
 	},
-	},
-	"badgerds": {
-		Apply: func(c *Config) error {
+	"badgerds": func(c *Config) error {
 		c.Datastore.Spec = map[string]interface{}{
 			"type":   "measure",
 			"prefix": "badger.datastore",
@@ -80,11 +69,10 @@ var Profiles = map[string]*Profile{
 		}
 		return nil
 	},
-		Revert: func(c *Config) error {
+	"default-datastore": func(c *Config) error {
 		c.Datastore.Spec = DefaultDatastoreConfig().Spec
 		return nil
 	},
-	},
 }
 
 func appendSingle(a []string, b []string) []string {

test/sharness/t0021-config.sh

@@ -50,6 +50,7 @@ CONFIG_SET_JSON_TEST='{
 
 test_profile_apply_revert() {
   profile=$1
+  inverse_profile=$2
 
   test_expect_success "save expected config" '
     ipfs config show >expected
@@ -64,11 +65,11 @@ test_profile_apply_revert() {
     test_must_fail test_cmp expected actual
   '
 
-  test_expect_success "'ipfs config profile revert ${profile}' works" '
-    ipfs config profile revert '${profile}'
+  test_expect_success "'ipfs config profile apply ${inverse_profile}' works" '
+    ipfs config profile apply '${inverse_profile}'
   '
 
-  test_expect_success "config is back to previous state after ${profile} revert" '
+  test_expect_success "config is back to previous state after ${inverse_profile} was applied" '
     ipfs config show >actual &&
     test_cmp expected actual
   '
@@ -192,7 +193,7 @@ test_config_cmd() {
   '
 
   test_expect_success "backup was created and looks good" '
-    test_cmp "$(find "$IPFS_PATH" -name "config-profile*")" before_patch
+    test_cmp "$(find "$IPFS_PATH" -name "config-*")" before_patch
   '
 
   test_expect_success "'ipfs config Swarm.AddrFilters' looks good with server profile" '
@@ -200,16 +201,16 @@ test_config_cmd() {
     test $(cat actual_config | wc -l) = 17
   '
 
-  test_expect_success "'ipfs config profile revert server' works" '
-    ipfs config profile revert server
+  test_expect_success "'ipfs config profile apply local-discovery' works" '
+    ipfs config profile apply local-discovery
   '
 
-  test_expect_success "'ipfs config Swarm.AddrFilters' looks good with reverted server profile" '
+  test_expect_success "'ipfs config Swarm.AddrFilters' looks good with applied local-discovery profile" '
     ipfs config Swarm.AddrFilters > actual_config &&
     test $(cat actual_config | wc -l) = 1
   '
 
-  test_profile_apply_revert server
+  test_profile_apply_revert server local-discovery
 
   # won't work as we already have this profile applied
   # test_profile_apply_revert test
@@ -219,7 +220,7 @@ test_config_cmd() {
   # test_profile_apply_revert badgerds
 
   test_expect_success "cleanup config backups" '
-    find "$IPFS_PATH" -name "config-profile*" -exec rm {} \;
+    find "$IPFS_PATH" -name "config-*" -exec rm {} \;
   '
 }