Tagging a component creates a locked version of the component.
Component versions are immutable. This means that they contain all dependencies required to make a component usable. Its possible to version a component from any project. Component versioning is the last step before sharing a component.
When you tag a component, Bit performs the actions below:
- Locking dependency resolution. Bit ensures it can resolve all dependencies. Afterward, Bit logs the dependencies’ state.
- Running component’s build and test. Bit runs compile and test tasks, if defined.
- Setting a version for the component. Bit uses SemVer to version components.
Tagging a component
Bit can only version tracked components that it can isolate. This example shows the component
hello/world, which Bit can isolate.
$ bit status new components > hello/world... ok
To tag the
hello/world component, use bit tag.
$ bit tag hello/world 1 components tagged | 1 added, 0 changed, 0 auto-tagged added components: firstname.lastname@example.org
This command has tagged the new component
hello/world in version
0.0.1. By default, Bit increments a patch version when tagging. The component is now
staged, as shown in the bit status output. Bit can only export
$ bit status staged components > hello/world
Set a specific version
Bit can set a specific version when tagging a component.
$ bit tag hello/world 1.0.0 1 components tagged | 1 added, 0 changed, 0 auto-tagged added components: email@example.com
Versioning many components
Often, we’ll want to tag many components at the same time. We do this with the
--all flag causes Bit to tag all new and modified components together. It can accept a specific SemVer for all components or increment each of the component’s versions.
To better understand this, let’s take the following component status as an example:
$ bit status new components > hello/world... ok > ui/button... ok modified components > string/pad-left... ok
We have two new components (
ui/button) and one modified component (
string/pad-left). We tag them together as follows:
$ bit tag --all 3 components tagged | 2 added, 1 changed, 0 auto-tagged added components: firstname.lastname@example.org, email@example.com changed components: firstname.lastname@example.org
We did not specify a version, so Bit has incremented all new and modified components by a patch version.
Aligning all local components to the same version
It’s possible to tag all components and set them with the same version. This is useful in cases where we need to ensure all components synced to a specific version release. To do this, we need to add the
--scope flag to the command:
bit tag --scope 1.0.1
Bit tags all components with version
Bumping component versions
The great thing about Semantic Versions is that it tells the consumers the type of change to expect. Bit double downs on it by allowing to state the type of change, and bump the version according to it.
Bit can bump either patch, minor and major versions, as flags of
bit tag --major # Increment all modified and new components with a major version. bit tag --minor # Increment all modified and new components with a minor version. bit tag --scope --patch # Increment all components with a patch version. bit tag --scope --patch # Increment all components in the workspace with a patch version.
We can untag staged components. Meaning that Bit has yet to export a version to a remote collection. Untagging a version won’t undo the code changes associated with that version. So, the component’s status reverts back to
modified. We untag a version using the
bit untag command:
$ bit untag foo/bar
Note that when Bit untags a staged component, it removes all pending versions.
Untagging a specific version
It’s possible to remove a single version if we have several tagged version of a component. We need to specify the exact version we want to remove:
bit untag foo/bar 1.0.0
Untagging a specific version for all the staged components
Untagging a specific staged version from all the staged components at once is done by using the
--all option and specifying a version.
bit untag --all 0.11.4
Untagging all the staged versions for all the components
To revert all staged versions in the workspace, use the
--all flag, without specifying a version.
bit untag --all
View component history
You can view a component’s tag history using bit log.
bit log hello/world