Add language service support for action.yml files (#275)

- Add validation, completion, hover, and document links for action.yml files
- Implement document type detection to route action.yml to action-specific handlers
- Add expression context for composite actions (inputs, steps, github, runner, etc.)
- Add schema validation for required fields, branding, and composite step requirements
- Support JavaScript (node20/node24), Docker, and composite action types
- Validate action references in composite action uses steps
- Add JSDoc comments to parser and template functions
- Refactor hover to use hoverToken consistently
- Fix lint errors and add return type annotations
This commit is contained in:
eric sciple
2026-01-02 10:38:52 -06:00
committed by GitHub
parent 3734de18ee
commit d2ffb50a92
45 changed files with 3700 additions and 477 deletions
+114 -58
View File
@@ -1,6 +1,7 @@
import {data, DescriptionDictionary, Parser} from "@actions/expressions";
import {FunctionDefinition, FunctionInfo} from "@actions/expressions/funcs/info";
import {Lexer} from "@actions/expressions/lexer";
import {parseAction} from "@actions/workflow-parser/actions/action-parser";
import {ErrorPolicy} from "@actions/workflow-parser/model/convert";
import {splitAllowedContext} from "@actions/workflow-parser/templates/allowed-context";
import {TemplateToken} from "@actions/workflow-parser/templates/tokens/template-token";
@@ -10,8 +11,9 @@ import {FileProvider} from "@actions/workflow-parser/workflows/file-provider";
import {Position, TextDocument} from "vscode-languageserver-textdocument";
import {Hover} from "vscode-languageserver-types";
import {ContextProviderConfig} from "./context-providers/config.js";
import {getContext, Mode} from "./context-providers/default.js";
import {getActionExpressionContext, getWorkflowExpressionContext, Mode} from "./context-providers/default.js";
import {getFunctionDescription} from "./context-providers/descriptions.js";
import {ActionContext, getActionContext} from "./context/action-context.js";
import {getWorkflowContext, WorkflowContext} from "./context/workflow-context.js";
import {
getReusableWorkflowInputDescription,
@@ -20,10 +22,12 @@ import {
import {ExpressionPos, mapToExpressionPos} from "./expression-hover/expression-pos.js";
import {HoverVisitor} from "./expression-hover/visitor.js";
import {info} from "./log.js";
import {nullTrace} from "./nulltrace.js";
import {isActionDocument} from "./utils/document-type.js";
import {isPotentiallyExpression} from "./utils/expression-detection.js";
import {findToken} from "./utils/find-token.js";
import {mapRange} from "./utils/range.js";
import {fetchOrConvertWorkflowTemplate, fetchOrParseWorkflow} from "./utils/workflow-cache.js";
import {getOrConvertActionTemplate, getOrConvertWorkflowTemplate, getOrParseWorkflow} from "./utils/workflow-cache.js";
export type HoverConfig = {
descriptionProvider?: DescriptionProvider;
@@ -32,79 +36,125 @@ export type HoverConfig = {
};
export type DescriptionProvider = {
getDescription(context: WorkflowContext, token: TemplateToken, path: TemplateToken[]): Promise<string | undefined>;
getDescription(
context: WorkflowContext | ActionContext,
token: TemplateToken,
path: TemplateToken[]
): Promise<string | undefined>;
};
/**
* Returns hover information for the token at the given position.
*/
export async function hover(document: TextDocument, position: Position, config?: HoverConfig): Promise<Hover | null> {
const file: File = {
name: document.uri,
content: document.getText()
};
const parsedWorkflow = fetchOrParseWorkflow(file, document.uri);
if (!parsedWorkflow?.value) {
// Determine document type based on file path (action.yml vs workflow file)
const isAction = isActionDocument(document.uri);
// Parse document
const parsedTemplate = isAction ? parseAction(file, nullTrace) : getOrParseWorkflow(file, document.uri);
if (!parsedTemplate?.value) {
return null;
}
const template = await fetchOrConvertWorkflowTemplate(
parsedWorkflow.context,
parsedWorkflow.value,
document.uri,
config,
{
errorPolicy: ErrorPolicy.TryConversion,
fetchReusableWorkflowDepth: config?.fileProvider ? 1 : 0
}
);
const tokenResult = findToken(position, parsedWorkflow.value);
// Find the token at the cursor position
const tokenResult = findToken(position, parsedTemplate.value);
const {token, keyToken, parent} = tokenResult;
const tokenDefinitionInfo = (keyToken || parent || token)?.definitionInfo;
const workflowContext = getWorkflowContext(document.uri, template, tokenResult.path);
if (token && tokenDefinitionInfo) {
if (isBasicExpression(token) || isPotentiallyExpression(token)) {
info(`Calculating expression hover for token with definition ${tokenDefinitionInfo.definition.key}`);
const allowedContext = tokenDefinitionInfo.allowedContext || [];
const {namedContexts, functions} = splitAllowedContext(allowedContext);
const context = await getContext(namedContexts, config?.contextProviderConfig, workflowContext, Mode.Completion);
for (const func of functions) {
func.description = getFunctionDescription(func.name);
}
const exprPos = mapToExpressionPos(token, position);
if (exprPos) {
return expressionHover(exprPos, context, namedContexts, functions);
}
}
}
if (!token?.definition) {
// Early exit if there's nothing to provide hover for
const hoverToken = token || keyToken;
const isExpressionHover =
token && tokenDefinitionInfo && (isBasicExpression(token) || isPotentiallyExpression(token));
if (!isExpressionHover && !hoverToken?.definition) {
return null;
}
info(`Calculating hover for token with definition ${token.definition.key}`);
// Build document context (jobs, steps, inputs, etc.) from the parsed template
const documentContext = isAction
? getActionContext(
document.uri,
getOrConvertActionTemplate(parsedTemplate.context, parsedTemplate.value, document.uri, {
errorPolicy: ErrorPolicy.TryConversion
}),
tokenResult.path
)
: getWorkflowContext(
document.uri,
await getOrConvertWorkflowTemplate(parsedTemplate.context, parsedTemplate.value, document.uri, config, {
errorPolicy: ErrorPolicy.TryConversion,
fetchReusableWorkflowDepth: config?.fileProvider ? 1 : 0
}),
tokenResult.path
);
if (tokenResult.parent && isReusableWorkflowJobInput(tokenResult)) {
let description = getReusableWorkflowInputDescription(workflowContext, tokenResult);
description = appendContext(description, token.definitionInfo?.allowedContext);
return {
contents: description,
range: mapRange(token.range)
} satisfies Hover;
// Expression hover
if (isExpressionHover) {
info(`Calculating expression hover for token with definition ${tokenDefinitionInfo.definition.key}`);
const allowedContext = tokenDefinitionInfo.allowedContext || [];
const {namedContexts, functions} = splitAllowedContext(allowedContext);
// Build expression context with named contexts (github, env, etc.) and their descriptions
const expressionContext = isAction
? getActionExpressionContext(
namedContexts,
config?.contextProviderConfig,
documentContext as ActionContext,
Mode.Hover
)
: await getWorkflowExpressionContext(
namedContexts,
config?.contextProviderConfig,
documentContext as WorkflowContext,
Mode.Hover
);
// Populate function descriptions for hover display
for (const func of functions) {
func.description = getFunctionDescription(func.name);
}
// Convert document position to expression-relative position
const exprPos = mapToExpressionPos(token, position);
if (exprPos) {
// Find the expression element at the cursor and return its description
return expressionHover(exprPos, expressionContext, namedContexts, functions);
}
}
let description = await getDescription(config, workflowContext, token, tokenResult.path);
description = appendContext(description, token.definitionInfo?.allowedContext);
if (!hoverToken?.definition) {
return null;
}
// Non-expression hover: show the schema description for the YAML key or value
info(`Calculating hover for token with definition ${hoverToken.definition.key}`);
let description: string;
if (!isAction && tokenResult.parent && isReusableWorkflowJobInput(tokenResult)) {
// Reusable workflow call: fetch the called workflow's input descriptions
description = getReusableWorkflowInputDescription(documentContext as WorkflowContext, tokenResult);
} else {
// Default: use custom provider or token's schema description
description =
(await getDescription(config, documentContext, hoverToken, tokenResult.path)) || hoverToken.description || "";
}
// Return hover with description and available expression contexts
return {
contents: description,
range: mapRange(token.range)
contents: appendContext(description, hoverToken.definitionInfo?.allowedContext),
range: mapRange(hoverToken.range)
} satisfies Hover;
}
/**
* Appends available expression contexts and functions to a hover description.
* For example: "Available expression contexts: `github`, `env`"
*/
function appendContext(description: string, allowedContext?: string[]) {
if (!allowedContext || allowedContext.length == 0) {
return description;
@@ -128,24 +178,30 @@ function appendContext(description: string, allowedContext?: string[]) {
return `${description}${namedContextsString}${functionsString}`;
}
/**
* Gets a custom description from the configured description provider.
* Used to fetch rich descriptions like action input docs from GitHub repos.
*/
async function getDescription(
config: HoverConfig | undefined,
workflowContext: WorkflowContext,
documentContext: WorkflowContext | ActionContext,
token: TemplateToken,
path: TemplateToken[]
) {
const defaultDescription = token.description || "";
): Promise<string | undefined> {
if (!config?.descriptionProvider) {
return defaultDescription;
return undefined;
}
const description = await config.descriptionProvider.getDescription(workflowContext, token, path);
return description || defaultDescription;
return await config.descriptionProvider.getDescription(documentContext, token, path);
}
/**
* Parses an expression and finds the element at the cursor position to show its description.
* For example, hovering over `github.actor` shows "The login of the user that triggered the workflow".
*/
function expressionHover(
exprPos: ExpressionPos,
context: DescriptionDictionary,
expressionContext: DescriptionDictionary,
namedContexts: string[],
functions: FunctionInfo[]
): Hover | null {
@@ -165,7 +221,7 @@ function expressionHover(
call: () => new data.Null()
});
}
const hv = new HoverVisitor(position, context, functionMap);
const hv = new HoverVisitor(position, expressionContext, functionMap);
const hoverResult = hv.hover(expr);
if (!hoverResult) {
return null;