This PR adds a new `pulumi history` command, which prints the update history for a stack.
The local backend stores the update history in a JSON file on disk, next to the checkpoint file. The cloud backend simply provides the update metadata, and expects to receive all the data from a (NYI) `/history` REST endpoint.
`pkg/backend/updates.go` defines the data that is being persisted. The way the data is wired through the system is adding a new `backend.UpdateMetadata` parameter to a Stack/Backend's `Update` and `Destroy` methods.
I use `tests/integration/stack_outputs/` as the simple app for the related tests, hence the addition to the `.gitignore` and fixing the name in the `Pulumi.yaml`.
Fixes#636.
We did not pretty print either the workspace settings file or the
repository settings file, but pretty print other files like the
credentials file and checkpoints. Now we do.
Fixes#540
The prior behavior with cloud authentication was a bit confusing
when authenticating against anything but https://pulumi.com/. This
change fixes a few aspects of this:
* Improve error messages to differentiate between "authentication
failed" and "you haven't logged into the target cloud URL."
* Default to the cloud you're currently authenticated with, rather
than unconditionally selecting https://pulumi.com/. This ensures
$ pulumi login -c https://api.moolumi.io
$ pulumi stack ls
works, versus what was currently required
$ pulumi login -c https://api.moolumi.io
$ pulumi stack ls -c https://api.moolumi.io
with confusing error messages if you forgot the second -c.
* To do this, our default cloud logic changes to
1) Prefer the explicit -c if supplied;
2) Otherwise, pick the "currently authenticated" cloud; this is
the last cloud to have been targeted with pulumi login, or
otherwise the single cloud in the list if there is only one;
3) https://pulumi.com/ otherwise.
This improves the overall cloud CLI experience workflow.
Now whether a stack is local or cloud is inherent to the stack
itself. If you interact with a cloud stack, we transparently talk
to the cloud; if you interact with a local stack, we just do the
right thing, and perform all operations locally. Aside from sometimes
seeing a cloud emoji pop-up ☁️, the experience is quite similar.
For example, to initialize a new cloud stack, simply:
$ pulumi login
Logging into Pulumi Cloud: https://pulumi.com/
Enter Pulumi access token: <enter your token>
$ pulumi stack init my-cloud-stack
Note that you may log into a specific cloud if you'd like. For
now, this is just for our own testing purposes, but someday when we
support custom clouds (e.g., Enterprise), you can just say:
$ pulumi login --cloud-url https://corp.acme.my-ppc.net:9873
The cloud is now the default. If you instead prefer a "fire and
forget" style of stack, you can skip the login and pass `--local`:
$ pulumi stack init my-faf-stack --local
If you are logged in and run `pulumi`, we tell you as much:
$ pulumi
Usage:
pulumi [command]
// as before...
Currently logged into the Pulumi Cloud ☁️https://pulumi.com/
And if you list your stacks, we tell you which one is local or not:
$ pulumi stack ls
NAME LAST UPDATE RESOURCE COUNT CLOUD URL
my-cloud-stack 2017-12-01 ... 3 https://pulumi.com/
my-faf-stack n/a 0 n/a
And `pulumi stack` by itself prints information like your cloud org,
PPC name, and so on, in addition to the usuals.
I shall write up more details and make sure to document these changes.
This change also fairly significantly refactors the layout of cloud
versus local logic, so that the cmd/ package is resonsible for CLI
things, and the new pkg/backend/ package is responsible for the
backends. The following is the overall resulting package architecture:
* The backend.Backend interface can be implemented to substitute
a new backend. This has operations to get and list stacks,
perform updates, and so on.
* The backend.Stack struct is a wrapper around a stack that has
or is being manipulated by a Backend. It resembles our existing
Stack notions in the engine, but carries additional metadata
about its source. Notably, it offers functions that allow
operations like updating and deleting on the Backend from which
it came.
* There is very little else in the pkg/backend/ package.
* A new package, pkg/backend/local/, encapsulates all local state
management for "fire and forget" scenarios. It simply implements
the above logic and contains anything specific to the local
experience.
* A peer package, pkg/backend/cloud/, encapsulates all logic
required for the cloud experience. This includes its subpackage
apitype/ which contains JSON schema descriptions required for
REST calls against the cloud backend. It also contains handy
functions to list which clouds we have authenticated with.
* A subpackage here, pkg/backend/state/, is not a provider at all.
Instead, it contains all of the state management functions that
are currently shared between local and cloud backends. This
includes configuration logic -- including encryption -- as well
as logic pertaining to which stacks are known to the workspace.
This addresses pulumi/pulumi#629 and pulumi/pulumi#494.
The first exception relates to how we launch plugins. Plugin paths are
calculated using a well-known set of rules; this makes `gas` suspicious
due to the need to use a variable to store the path of the plugin.
The second and third are in test code and aren't terribly concerning.
The latter exception asks `gas` to ignore the access key we hard-code
into the integration tests for our Pulumi test account.
The fourth exception allows use to use more permissive permissions for
the `.pulumi` directory than `gas` would prefer. We use `755`; `gas`
wants `700` or stricter. `755` is the default for `mkdir` and `.git` and
so seems like a reasonable choice for us.
When deploying a project via the Pulumi.com service, we have to upload
the entire "context" of your project to Pulumi.com. The context of the
program is all files in the directory tree rooted by the `Pulumi.yaml`
file, which will often contain stuff we don't want to upload, but
previously we had no control over what would be updated (and so folks
would do hacky things like delete folders before running `pulumi
update`).
This change adds support for `.pulumiignore` files which should behave
like `.gitignore`. In addition, we were not previously compressing
files when we added them to the zip archive we uploaded and now.
By default, every .pulumiignore file is treated as if it had an
exclusion for `.git/` at the top of the file (users can override this
by adding an explicit `!.git/` to their file) since it is very
unlikely for there to ever be a reason to upload the .git folder to
the service.
Fixespulumi/pulumi-service#122
This change adds back component output properties. Doing so
requires splitting the RPC interface for creating resources in
half, with an initial RegisterResource which contains all of the
input properties, and a final CompleteResource which optionally
contains any output properties synthesized by the component.
Previously, we stored configuration information in the Pulumi.yaml
file. This was a change from the old model where configuration was
stored in a special section of the checkpoint file.
While doing things this way has some upsides with being able to flow
configuration changes with your source code (e.g. fixed values for a
production stack that version with the code) it caused some friction
for the local development scinerio. In this case, setting
configuration values would pend changes to Pulumi.yaml and if you
didn't want to publish these changes, you'd have to remember to remove
them before commiting. It also was problematic for our examples, where
it was not clear if we wanted to actually include values like
`aws:config:region` in our samples. Finally, we found that for our
own pulumi service, we'd have values that would differ across each
individual dev stack, and publishing these values to a global
Pulumi.yaml file would just be adding noise to things.
We now adopt a hybrid model, where by default configuration is stored
locally, in the workspace's settings per project. A new flag `--save`
tests commands to actual operate on the configuration information
stored in Pulumi.yaml.
With the following change, we have have four "slots" configuration
values can end up in:
1. In the Pulumi.yaml file, applies to all stacks
2. In the Pulumi.yaml file, applied to a specific stack
3. In the local workspace.json file, applied to all stacks
4. In the local workspace.json file, applied to a specific stack
When computing the configuration information for a stack, we apply
configuration in the above order, overriding values as we go
along.
We also invert the default behavior of the `pulumi config` commands so
they operate on a specific stack (i.e. how they did before
e3610989). If you want to apply configuration to all stacks, `--all`
can be passed to any configuration command.
- When looking for a `.pulumi` folder to reuse, only consider ones
that have a `settings.json` in them.
- Make the error message when there is no repository a little more
informative by telling someone to run `pulumi init`
Calls to `NewProjectWorkspace` will panic if there is no Pulumi.yaml found in the folder hierarchy. Simple repo:
```
git init
pulumi init
pulumi stack init x
```
`DetectPackage` will search until it gets to the `.pulumi` directory or finds a `Pulumi.yaml` file. In the case of the former, we pass "" to `LoadPackage` which then asserts because the file doesn't exist.
We now detect this condition and surface an error to the user. The error text is patterned after running a git command when there is no .git folder found:
fatal: Not a git repository (or any of the parent directories): .git
Now, instead of having a .pulumi folder next to each project, we have
a single .pulumi folder in the root of the repository. This is created
by running `pulumi init`.
When run in a git repository, `pulumi init` will place the .pulumi
file next to the .git folder, so it can be shared across all projects
in a repository. When not in a git repository, it will be created in
the current working directory.
We also start tracking information about the repository itself, in a
new `repo.json` file stored in the root of the .pulumi folder. The
information we track are "owner" and "name" which map to information
we use on pulumi.com.
When run in a git repository with a remote named origin pointing to a
GitHub project, we compute the owner and name by deconstructing
information from the remote's URL. Otherwise, we just use the current
user's username and the name of the current working directory as the
owner and name, respectively.
Instead of doing the logic to see if a type has YAML tags and then
dispatching based on that to use either the direct go-yaml marshaller
or the one that works in terms of JSON tags, let's just say that we
always add YAML tags as well, and use go-yaml directly.
Previously we used the word "Environment" as the term for a deployment
target, but since then we've started to use the term Stack. Adopt this
across the CLI.
From a user's point of view, there are a few changes:
1. The `env` verb has been renamed to `stack`
2. The `-e` and `--env` options to commands which operate on an
environment now take `-s` or `--stack` instead.
3. Becase of (2), the commands that used `-s` to display a summary now
only support passing the full option name (`--summary`).
On the local file system, we still store checkpoint data in the `env`
sub-folder under `.pulumi` (so we can reuse existing checkpoint files
that were written to the old folder)
It was only being used for two cases where we would issue warnings for
cases where the file system casing did not match expected casing. I
think it's probably better if we don't try to be smart here and just
treat these cases the same as if the file had not existed. Removing
the dependncy on diag also makes it a little clearer that this stuff
should be pulled out from the engine.
This includes a few changes:
* The repo name -- and hence the Go modules -- changes from pulumi-fabric to pulumi.
* The Node.js SDK package changes from @pulumi/pulumi-fabric to just pulumi.
* The CLI is renamed from lumi to pulumi.
* Use `global.hasOwnProperty(ident)`, rather than `global[ident] !== undefined`,
to avoid classifying references to globals as free variables. Surprise(!!),
the prior logic wouldn't work for `undefined` itself... 😒
* Expand this check to include the built-in Node.js module variables, namely
`__dirname`, `__filename`, `exports`, `module`, and `require`, so that
references to them don't get classified as serializable free variables either.
* Place catch variables in scope, so that `catch (err) { ... }` won't yield
free variables for references to `err` within `...`.
* Place recursive function definitions into the top-level `var`-like scope of
variables so that we don't consider references to them free.
* Harden all error pathways in the native C++ add-on so that we terminate
anytime an exception is in-flight, rather than limping along and making
things worse...
We are renaming Lumi to Pulumi Fabric. This change simply renames the
pulumi/lumi repo to pulumi/pulumi-fabric, without the CLI tools and other
changes that will follow soon afterwards.
There are a few things that annoyed me about the way our CLI works with
directories when loading packages. For example, `lumi pack info some/pack/dir/`
never worked correctly. This is unfortunate when scripting commands.
This change fixes the workspace detection logic to handle these cases.
This change eliminates the need to constantly type in the environment
name when performing major commands like configuration, planning, and
deployment. It's probably due to my age, however, I keep fat-fingering
simple commands in front of investors and I am embarrassed!
In the new model, there is a notion of a "current environment", and
I have modeled it kinda sorta just like Git's notion of "current branch."
By default, the current environment is set when you `init` something.
Otherwise, there is the `coco env select <env>` command to change it.
(Running this command w/out a new <env> will show you the current one.)
The major commands `config`, `plan`, `deploy`, and `destroy` will prefer
to use the current environment, unless it is overridden by using the
--env flag. All of the `coco env <cmd> <env>` commands still require the
explicit passing of an environment which seems reasonable since they are,
after all, about manipulating environments.
As part of this, I've overhauled the aging workspace settings cruft,
which had fallen into disrepair since the initial prototype.
This changes a few naming things:
* Rename "husk" to "environment" (`coco env` for short).
* Rename NutPack/NutIL to CocoPack/CocoIL.
* Rename the primary Nut.yaml/json project file to Coconut.yaml/json.
* Rename the compiled Nutpack.yaml/json file to Cocopack.yaml/json.
* Rename the package asset directory from nutpack/ to .coconut/.
This command is handy for development, so I whipped up a quick implementation.
All it does is print all known husks with their associated deployment time
and resource count (if any, or "n/a" for initialized husks with no deployments).
This change partially implements pulumi/coconut#94, by adding the
ability to name targets during creation and reuse those names during
deletion and update. This simplifies the management of deployment
records, checkpoints, and snapshots.
I've opted to call these things "husks" (perhaps going overboard with
joy after our recent renaming). The basic idea is that for any
executable Nut that will be deployed, you have a nutpack/ directory
whose layout looks roughly as follows:
nutpack/
bin/
Nutpack.json
... any other compiled artifacts ...
husks/
... one snapshot per husk ...
For example, if we had a stage and prod husk, we would have:
nutpack/
bin/...
husks/
prod.json
stage.json
In the prod.json and stage.json files, we'd have the most recent
deployment record for that environment. These would presumably get
checked in and versioned along with the overall Nut, so that we
can use Git history for rollbacks, etc.
The create, update, and delete commands look in the right place for
these files automatically, so you don't need to manually supply them.
This change repivots the plan/apply commands slightly. This is largely
in preparation for performing deletes and updates of existing environments.
The old way was slightly confusing and made things appear more "magical"
than they actually are. Namely, different things are needed for different
kinds of deployment operations, and trying to present them each underneath
a single pair of CLI commands just leads to weird modality and options.
The new way is to offer three commands: create, update, and delete. Each
does what it says on the tin: create provisions a new environment, update
makes resource updates to an existing one, and delete tears down an existing
one entirely. The arguments are what make this interesting: create demands
a MuPackage to evaluate (producing the new desired state snapshot), update
takes *both* an existing snapshot file plus a MuPackage to evaluate (producing
the new desired state snapshot to diff against the existing one), and delete
merely takes an existing snapshot file and no MuPackage, since all it must
do is tear down an existing known environment.
Replacing the plan functionality is the --dry-run (-n) flag that may be
passed to any of the above commands. This will print out the plan without
actually performing any opterations.
All commands produce serializable resource files in the MuGL file format,
and attempt to do smart things with respect to backups, etc., to support the
intended "Git-oriented" workflow of the pure CLI dev experience.
This changes a few things with dependency probing:
1) Probe for Mupack files, not Mufiles.
2) Substitute defaults in the PackageURL before probing.
3) Trace the full search paths when an import fails to resolve.
This will help diagnose dependency resolution issues.
This change rearranges the old way we dealt with URLs. In the old system,
virtually every reference to an element, including types, was fully qualified
with a possible URL-like reference. (The old pkg/tokens/Ref type.) In the
new model, only dependency references are URL-like. All maps and references
within the MuPack/MuIL format are token and name based, using the new
pkg/tokens/Token and pkg/tokens/Name family of related types.
As such, this change renames Ref to PackageURLString, and RefParts to
PackageURL. (The convenient name is given to the thing with "more" structure,
since we prefer to deal with structured types and not strings.) It moves
out of the pkg/tokens package and into pkg/pack, since it is exclusively
there to support package resolution. Similarly, the Version, VersionSpec,
and related types move out of pkg/tokens and into pkg/pack.
This change cleans up the various binder, package, and workspace logic.
Most of these changes are a natural fallout of this overall restructuring,
although in a few places we remained sloppy about the difference between
Token, Name, and URL. Now the type system supports these distinctions and
forces us to be more methodical about any conversions that take place.
I was sloppy in my use of names versus tokens in the original AST.
Now that we're actually binding things to concrete symbols, etc., we
need to be more precise. In particular, names are just identifiers
that must be "interpreted" in a given lexical context for them to
make any sense; whereas, tokens stand alone and can be resolved without
context other than the set of imported packages, modules, and overall
module structure. As such, names are much simpler than tokens.
As explained in the comments, tokens.Names are simple identifiers:
Name = [A-Za-z_][A-Za-z0-9_]*
and tokens.QNames are fully qualified identifiers delimited by "/":
QName = [ <Name> "/" ]* <Name>
The legal grammar for a token depends on the subset of symbols that
token is meant to represent. However, the most general case, that
accepts all specializations of tokens, is roughly as follows:
Token = <Name> |
<PackageName>
[ ":" <ModuleName>
[ "/" <ModuleMemberName>
[ "." <Class MemberName> ]
]
]
where:
PackageName = <QName>
ModuleName = <QName>
ModuleMemberName = <Name>
ClassMemberName = <Name>
Please refer to the comments in pkg/tokens/tokens.go for more details.
This change further merges the new AST and MuPack/MuIL formats and
abstractions into the core of the compiler. A good amount of the old
code is gone now; I decided against ripping it all out in one fell
swoop so that I can methodically check that we are preserving all
relevant decisions and/or functionality we had in the old model.
The changes are too numerous to outline in this commit message,
however, here are the noteworthy ones:
* Split up the notion of symbols and tokens, resulting in:
- pkg/symbols for true compiler symbols (bound nodes)
- pkg/tokens for name-based tokens, identifiers, constants
* Several packages move underneath pkg/compiler:
- pkg/ast becomes pkg/compiler/ast
- pkg/errors becomes pkg/compiler/errors
- pkg/symbols becomes pkg/compiler/symbols
* pkg/ast/... becomes pkg/compiler/legacy/ast/...
* pkg/pack/ast becomes pkg/compiler/ast.
* pkg/options goes away, merged back into pkg/compiler.
* All binding functionality moves underneath a dedicated
package, pkg/compiler/binder. The legacy.go file contains
cruft that will eventually go away, while the other files
represent a halfway point between new and old, but are
expected to stay roughly in the current shape.
* All parsing functionality is moved underneath a new
pkg/compiler/metadata namespace, and we adopt new terminology
"metadata reading" since real parsing happens in the MetaMu
compilers. Hence, Parser has become metadata.Reader.
* In general phases of the compiler no longer share access to
the actual compiler.Compiler object. Instead, shared state is
moved to the core.Context object underneath pkg/compiler/core.
* Dependency resolution during binding has been rewritten to
the new model, including stashing bound package symbols in the
context object, and detecting import cycles.
* Compiler construction does not take a workspace object. Instead,
creation of a workspace is entirely hidden inside of the compiler's
constructor logic.
* There are three Compile* functions on the Compiler interface, to
support different styles of invoking compilation: Compile() auto-
detects a Mu package, based on the workspace; CompilePath(string)
loads the target as a Mu package and compiles it, regardless of
the workspace settings; and, CompilePackage(*pack.Package) will
compile a pre-loaded package AST, again regardless of workspace.
* Delete the _fe, _sema, and parsetree phases. They are no longer
relevant and the functionality is largely subsumed by the above.
...and so very much more. I'm surprised I ever got this to compile again!
This change helps move us one step closer to eliminating the old metadata-
based AST goo, and replacing it with MuPack/MuIL AST and symbol information.
In particular, all name/token "symbol" code -- things like identifiers,
package/member references, and version specs -- move out of the pkg/ast
package and into the top-level pkg/symbols package, alongside the existing
MuPack/MuIL symbol token types.
This is the first change of many to merge the MuPack/MuIL formats
into the heart of the "compiler".
In fact, the entire meaning of the compiler has changed, from
something that took metadata and produced CloudFormation, into
something that takes MuPack/MuIL as input, and produces a MuGL
graph as output. Although this process is distinctly different,
there are several aspects we can reuse, like workspace management,
dependency resolution, and some amount of name binding and symbol
resolution, just as a few examples.
An overview of the compilation process is available as a comment
inside of the compiler.Compile function, although it is currently
unimplemented.
The relationship between Workspace and Compiler has been semi-
inverted, such that all Compiler instances require a Workspace
object. This is more natural anyway and moves some of the detection
logic "outside" of the Compiler. Similarly, Options has moved to
a top-level package, so that Workspace and Compiler may share
access to it without causing package import cycles.
Finally, all that templating crap is gone. This alone is cause
for mass celebration!
This change adds a handful of property binding tests.
It also fixes:
* AsName should assert IsName.
* Enumerate properties stably, so that it is deterministic.
* Do not issue errors about unrecognized properties for the special
`mu/extension` type. It's entire purpose in life is to offer an
entirely custom set of properties, which the provider is meant to
validate.
* Default to an empty map if properties are missing.
* Add a "/" to the end of the namespace from the workspace, if present.
And rearranges some code:
* Rename the LiteralX types to XLiteral; e.g., StringLiteral instead of
LiteralString. I kept typing XLiteral erroneously.
* Eliminate the Mu prefix on all of the predefined type and service
functions and types. It's superfluous and reads nicer this way.
* Swap the order of "expected" vs. "got" in the error message about
incorrect property types. It used to say "got %v, expected %v"; I
personally find that it is more helpful if it says "expected %v,
got %v". YMMV.
This change permits a workspace to specify a namespace, which is just a name
part that is trimmed off the front of directories when probing for inter-
workspace dependencies. For example, if our namespace is aws/, normally we'd
need to organize our namespace into directories like:
<root>
| aws/
| | dynamodb/
| | ec2/
| | s3/
... and so on ...
If we instead specify a namespace
namespace: aws
Then we can instead organize our project workspace as follows:
<root>
| dynamodb/
| ec2/
| s3/
... and so on ...
This change makes workspace file naming a little more consistent with respect
to Mufile naming. Instead of having a .mu/ directory, under which a workspace.yaml
and/or a stacks directory might exist, we now have a Muspace.yaml (or .json) file,
and a .Mudeps/ directory. This has nicer symmetric with respect to Mu.yaml files.
This change detects the target cloud earlier on in the compilation process.
Prior to this change, we didn't know this information until the backend code-generation.
Clearly we need to know this at least by then, however, templates can specialize on this
information, so we actually need it sooner. This change moves it into the frontend part.
Note that to support this we now eliminate the ability to specify target clusters in
the Mufile alone. That "feels" right to me anyway, since Mufiles are supposed to be
agnostic to their deployment environment, other than template specialization. Instead,
this information can come from the CLI and/or the workspace settings file.
This change adds a new Diagable interface from which you can obtain
a diagnostic's location information (Document and Location). A new
At function replaces WithDocument, et al., and will be used soon to
permit all arbitrary AST nodes to report back their position.
This change implements dependency versions, including semantic analysis, per the
checkin 83030685c3.
There's quite a bit in here but at a top-level this parses and validates dependency
references of the form
[[proto://]base.url]namespace/.../name[@version]
and verifies that the components are correct, as well as binding them to symbols.
These references can appear in two places at the moment:
* Service types.
* Cluster dependencies.
As part of this change, a number of supporting changes have been made:
* Parse Workspaces using a full-blown parser, parser analysis, and semantic analysis.
This allows us to share logic around the validation of common AST types. This also
moves some of the logic around loading workspace.yaml files back to the parser, where
it can be unified with the way we load Mu.yaml files.
* New ast.Version and ast.VersionSpec types. The former represents a precise version
-- either a specific semantic version or a short or long Git SHA hash -- and the
latter represents a range -- either a Version, "latest", or a semantic range.
* New ast.Ref and ast.RefParts types. The former is an unparsed string that is
thought to contain a Ref, while the latter is a validated Ref that has been parsed
into its components (Proto, Base, Name, and Version).
* Added some type assertions to ensure certain structs implement certain interfaces,
to speed up finding errors. (And remove the coercions that zero-fill vtbl slots.)
* Be consistent about prefixing error types with Error or Warning.
* Organize the core compiler driver's logic into three methods, FE, sema, and BE.
* A bunch of tests for some of the above ... more to come in an upcoming change.
This change adds support for Workspaces, a convenient way of sharing settings
among many Stacks, like default cluster targets, configuration settings, and the
like, which are not meant to be distributed as part of the Stack itself.
The following things are included in this checkin:
* At workspace initialization time, detect and parse the .mu/workspace.yaml
file. This is pretty rudimentary right now and contains just the default
cluster targets. The results are stored in a new ast.Workspace type.
* Rename "target" to "cluster". This impacts many things, including ast.Target
being changed to ast.Cluster, and all related fields, the command line --target
being changed to --cluster, various internal helper functions, and so on. This
helps to reinforce the desired mental model.
* Eliminate the ast.Metadata type. Instead, the metadata moves directly onto
the Stack. This reflects the decision to make Stacks "the thing" that is
distributed, versioned, and is the granularity of dependency.
* During cluster targeting, add the workspace settings into the probing logic.
We still search in the same order: CLI > Stack > Workspace.
This changes the probing logic for dependency resolution. The old logic was
inconsistent between the various roots. The new approach simply prefers locations
with a base URL component -- since they are more specific -- but will allow for
locations missing a base URL component. This is convenient for developers managing
a workspace where needing to specify the base URL in the path is annoying and
slightly too "opinionated" for my taste (especially for migrating existing services).
This change includes logic to resolve dependencies declared by stacks. The design
is described in https://github.com/marapongo/mu/blob/master/docs/deps.md.
In summary, each stack may declare dependencies, which are name/semver pairs. A
new structure has been introduced, ast.Ref, to distinguish between ast.Names and
dependency names. An ast.Ref includes a protocol, base part, and a name part (the
latter being an ast.Name); for example, in "https://hub.mu.com/mu/container/",
"https://" is the protocol, "hub.mu.com/" is the base, and "mu/container" is the
name. This is used to resolve URL-like names to package manager-like artifacts.
The dependency resolution phase happens after parsing, but before semantic analysis.
This is because dependencies are "source-like" in that we must load and parse all
dependency metadata files. We stick the full transitive closure of dependencies
into a map attached to the compiler to avoid loading dependencies multiple times.
Note that, although dependencies prohibit cycles, this forms a DAG, meaning multiple
inbound edges to a single stack may come from multiple places.
From there, we rely on ordinary visitation to deal with dependencies further.
This includes inserting symbol entries into the symbol table, mapping names to the
loaded stacks, during the first phase of binding so that they may be found
subsequently when typechecking during the second phase and beyond.
This change introduces a Workspace interface that can be used as a first
class object. We will embellish this as we start binding to dependencies,
which requires us to search multiple paths. This change also introduces a
workspace.InstallRoot() function to fetch the Mu install path.
This change moves the workspace and Mufile detection logic out of the compiler
package and into the workspace one.
This also sketches out the overall workspace structure. A workspace is "delimited"
by the presence of a .mu/ directory anywhere in the parent ancestry. Inside of that
directory we have an optional .mu/clusters.yaml (or .json) file containing cluster
settings shared among the whole workspace. We also have an optional .mu/stacks/
directory that contains dependencies used during package management.
The notion of a "global" workspace will also be present, which is essentially just
a .mu/ directory in your home, ~/.mu/, that has an equivalent structure, but can be
shared among all workspaces on the same machine.
This is a placeholder for future use; .mu_modules will be our moral
equivalent to NPM/Yarn's node_modules directory. I've chosen a dot
since for the most part developers can ignore its existence.
This change adds a few more compiler tests and rearranges some bits and pieces
that came up while doing so. For example, we now issue warnings for incorrect
casing and/or extensions of the Mufile (and test these conditions). As part of
doing that, it became clear the layering between the mu/compiler and mu/workspace
packages wasn't quite right, so some logic got moved around; additionally, the
separation of concerns between mu/workspace and mu/schema wasn't quite right, so
this has been fixed also (workspace just understands Mufile related things while
schema understands how to unmarshal the specific supported extensions).
This change recognizes .yml in addition to the official .yaml extension,
since .yml is actually very commonly used. In addition, while in here, I've
centralized more of the extensions logic so that it's more "data-driven"
and easier to manage down the road (one place to change rather than two).
This adds a bunch of general scaffolding and the beginning of a `build` command.
The general engineering scaffolding includes:
* Glide for dependency management.
* A Makefile that runs govet and golint during builds.
* Google's Glog library for logging.
* Cobra for command line functionality.
The Mu-specific scaffolding includes some packages:
* mu/pkg/diag: A package for compiler-like diagnostics. It's fairly barebones
at the moment, however we can embellish this over time.
* mu/pkg/errors: A package containing Mu's predefined set of errors.
* mu/pkg/workspace: A package containing workspace-related convenience helpers.
in addition to a main entrypoint that simply wires up and invokes the CLI. From
there, the mu/cmd package takes over, with the Cobra-defined CLI commands.
Finally, the mu/pkg/compiler package actually implements the compiler behavior.
Or, it will. For now, it simply parses a JSON or YAML Mufile into the core
mu/pkg/api types, and prints out the result.
