goparser

package
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 Go to latest Published: Apr 5, 2024 License: BSD-3-Clause Imports: 16 Imported by: 0

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goparser

import "github.com/blueprint-uservices/blueprint/plugins/golang/goparser"

Package goparser parses go modules and extracts module, package, struct, and interface information.

It is used by Blueprint to parse workflow specs.

Index

func ExprStr

func ExprStr(e ast.Expr) string

Returns a string representation of an expr and its internals Useful for debugging golang code parsers.

type ModuleInfo

Metadata about a module, such as its version and location on the local file system.

type ModuleInfo struct {
    ShortName string           // The last part of the module path
    Path      string           // Fully qualified name of the module
    Version   string           // Version of the module
    Dir       string           // Directory containing the module source
    IsLocal   bool             // True if the module is local (ie with a replace directive), false if it's from gocache
    GoModule  *packages.Module // The underlying golang module from [golang.org/x/tools/go/packages]
}

func FindModule
func FindModule[T any]() (*ModuleInfo, *gocode.UserType, error)

Finds and returns the module info for a type.

func FindPackageModule
func FindPackageModule(pkgName string) (*ModuleInfo, error)

Get the module info for a package.

func GetModuleInfo
func GetModuleInfo(moduleName string) (*ModuleInfo, error)

Get the info for a module. Better than reading the go.mod. Better than calling FindPackageModule because the root of the module doesn't need to be a golang package.

func (*ModuleInfo) String
func (m *ModuleInfo) String() string

type ParsedField

type ParsedField struct {
    gocode.Variable
    Struct   *ParsedStruct
    Position int
    Ast      *ast.Field
}

func (*ParsedField) Parse
func (f *ParsedField) Parse() error

func (*ParsedField) String
func (f *ParsedField) String() string

type ParsedFile

type ParsedFile struct {
    Package          *ParsedPackage
    Name             string                   // Filename
    Path             string                   // Fully qualified path to the file
    PathInModule     string                   // Path within the module to the file
    AnonymousImports []*ParsedImport          // Import declarations that were imported with .
    NamedImports     map[string]*ParsedImport // Import declarations - map from shortname to fully qualified package import name
    Ast              *ast.File                // The AST of the file
}

func (*ParsedFile) LoadFuncs
func (f *ParsedFile) LoadFuncs() error

Assumes that all structs and interfaces have been loaded for the package containing the file.

Loads the names of all funcs. If the func has a receiver type, then it is saved as a method on the appropriate struct; if it does not have a receiver type, then it is saved as a package func.

This does not parse the arguments or returns of the func

func (*ParsedFile) LoadImports
func (f *ParsedFile) LoadImports() error

func (*ParsedFile) LoadStructsAndInterfaces
func (f *ParsedFile) LoadStructsAndInterfaces() error

Looks for:

  • structs defined in the file
  • interfaces defined in the file
  • other user types defined in the file

Does not:

  • look for function declarations

func (*ParsedFile) LoadVars
func (f *ParsedFile) LoadVars() error

Looks for:

  • vars declared

func (*ParsedFile) ResolveIdent
func (f *ParsedFile) ResolveIdent(name string, typeParams ...string) gocode.TypeName

An ident can be:

  • a basic type, like int64, float32 etc.
  • any
  • a type declared locally within the file or package
  • a type imported with an `import . "package"` decl
  • a generic type from a struct or func's type params

func (*ParsedFile) ResolveSelector
func (f *ParsedFile) ResolveSelector(packageShortName string, name string) gocode.TypeName

func (*ParsedFile) ResolveType
func (f *ParsedFile) ResolveType(expr ast.Expr, typeParams ...string) gocode.TypeName

If the expr is in the context of a generic struct or func, typeParams provides the additional named type params

func (*ParsedFile) String
func (f *ParsedFile) String() string

type ParsedFunc

type ParsedFunc struct {
    gocode.Func
    File *ParsedFile
    Ast  *ast.FuncType
}

func (*ParsedFunc) AsConstructor
func (f *ParsedFunc) AsConstructor() *gocode.Constructor

func (*ParsedFunc) Parse
func (f *ParsedFunc) Parse() error

func (*ParsedFunc) String
func (f *ParsedFunc) String() string

type ParsedImport

type ParsedImport struct {
    File    *ParsedFile
    Package string
}

type ParsedInterface

type ParsedInterface struct {
    File    *ParsedFile
    Ast     *ast.InterfaceType
    Name    string
    Methods map[string]*ParsedFunc
}

func (*ParsedInterface) ServiceInterface
func (iface *ParsedInterface) ServiceInterface(ctx ir.BuildContext) *gocode.ServiceInterface

func (*ParsedInterface) String
func (i *ParsedInterface) String() string

func (*ParsedInterface) Type
func (iface *ParsedInterface) Type() *gocode.UserType

type ParsedModule

type ParsedModule struct {
    ShortName string                    // Short name of the module
    Name      string                    // Fully qualified name of the module
    Version   string                    // Version of the module
    SrcDir    string                    // Fully qualified location of the module on the filesystem
    IsLocal   bool                      // Is this a local module or from the go cache?
    Modfile   *modfile.File             // The modfile File struct is sufficiently simple that we just use it directly
    Packages  map[string]*ParsedPackage // Map from fully qualified package name to ParsedPackage
}

func (*ParsedModule) Load
func (mod *ParsedModule) Load() error

func (*ParsedModule) String
func (mod *ParsedModule) String() string

type ParsedModuleSet

Represents a set of code modules that have been parsed.

type ParsedModuleSet struct {
    Modules    map[string]*ParsedModule // Map from FQ module name to module object
    ModuleDirs map[string]*ParsedModule // Map from module SrcDir to module object
    Parent     *ParsedModuleSet         // Another module set to consult for modules if not present in this one
}

func New
func New(parent *ParsedModuleSet) *ParsedModuleSet

Returns a new \*ParsedModuleSet, optionally with a parent module set, which can be nil.

func (*ParsedModuleSet) Add
func (set *ParsedModuleSet) Add(info *ModuleInfo) (*ParsedModule, error)

Adds a module to the parsed module set. This is the preferred method for adding modules, versus [AddModule].

info for a module can be acquired by calling FindPackageModule or FindModule

func (*ParsedModuleSet) AddModule
func (set *ParsedModuleSet) AddModule(srcDir string) (*ParsedModule, error)

Manually parse and add a module to the parsed module set

If the srcDir has already been parsed, then this function will do nothing.

If [set.Parent] is not nil, then the module will be copied from [set.Parent] rather than re-parsed.

If [set] already contains a module with the same FQ module name as the one in srcDir then this function will return an error.

The parsed module will be assumed to be a local module; if it is not, then set [IsLocal] to false

func (*ParsedModuleSet) AddModules
func (set *ParsedModuleSet) AddModules(srcDirs ...string) error

Manually parse and add multiple modules to the set.

Equivalent to calling [AddModule] for each srcDir. If a srcDir has already been parsed then it will not be re-parsed.

Returns an error if any of the modules cannot be parsed.

func (*ParsedModuleSet) AddWorkspace
func (set *ParsedModuleSet) AddWorkspace(workspaceDir string) error

Parses and adds all modules in the specified workspaceDir

func (*ParsedModuleSet) FindInterface
func (set *ParsedModuleSet) FindInterface(pkgName string, name string) (*ParsedInterface, error)

Looks up the specified interface, possibly searching for and parsing the package.

Returns an error if the package cannot be found or parsed.

Returns the \*ParsedInterface if found, or nil if no such interface exists in the package.

func (*ParsedModuleSet) FindStruct
func (set *ParsedModuleSet) FindStruct(pkgName string, name string) (*ParsedStruct, error)

Looks up the specified struct, possibly searching for and parsing the package.

Returns an error if the package cannot be found or parsed.

Returns the \*ParsedStruct if found, or nil if no such struct exists in the package.

func (*ParsedModuleSet) GetPackage
func (set *ParsedModuleSet) GetPackage(name string) (*ParsedPackage, error)

Gets the \*ParsedPackage for the specified name, possibly searching for and parsing the package.

This method will return an error if the package was not found, or if there was a parse error

func (*ParsedModuleSet) String
func (set *ParsedModuleSet) String() string

type ParsedPackage

type ParsedPackage struct {
    Module        *ParsedModule
    Name          string                      // Fully qualified name of the package including module name
    ShortName     string                      // Shortname of the package (ie, the name used in an import statement)
    PackageDir    string                      // Subdirectory within the module containing the package
    SrcDir        string                      // Fully qualified location of the package on the filesystem
    Files         map[string]*ParsedFile      // Map from filename to ParsedFile
    Ast           *ast.Package                // The AST of the package
    DeclaredTypes map[string]gocode.UserType  // Types declared within this package
    Structs       map[string]*ParsedStruct    // Structs parsed from this package
    Interfaces    map[string]*ParsedInterface // Interfaces parsed from this package
    Funcs         map[string]*ParsedFunc      // Functions parsed from this package (does not include funcs with receiver types)
    Vars          map[string]*ParsedVar       // Vars declared in this package; we save their AST but don't process them
}

func (*ParsedPackage) Load
func (pkg *ParsedPackage) Load() error

func (*ParsedPackage) Parse
func (pkg *ParsedPackage) Parse() error

func (*ParsedPackage) String
func (pkg *ParsedPackage) String() string

type ParsedStruct

type ParsedStruct struct {
    File            *ParsedFile
    Ast             *ast.StructType
    Name            string
    Methods         map[string]*ParsedFunc  // Methods declared directly on this struct, does not include promoted methods (not implemented yet)
    FieldsList      []*ParsedField          // All fields in the order that they are declared
    Fields          map[string]*ParsedField // Named fields declared in this struct only, does not include promoted fields (not implemented yet)
    PromotedField   *ParsedField            // If there is a promoted field, stored here
    AnonymousFields []*ParsedField          // Subsequent anonymous fields
    TypeParams      []string                // Names of generic type parameters
}

func (*ParsedStruct) String
func (f *ParsedStruct) String() string

func (*ParsedStruct) Type
func (struc *ParsedStruct) Type() *gocode.UserType

type ParsedVar

Currently we save var statements but don't do anything with them

type ParsedVar struct {
    File *ParsedFile
    Name string
    Ast  *ast.ValueSpec
}

Generated by gomarkdoc

Documentation

Overview

Package goparser parses go modules and extracts module, package, struct, and interface information.

It is used by Blueprint to parse workflow specs.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func ExprStr 

func ExprStr(e ast.Expr) string

Returns a string representation of an expr and its internals Useful for debugging golang code parsers.

Types

type ModuleInfo 

type ModuleInfo struct {
	ShortName string           // The last part of the module path
	Path      string           // Fully qualified name of the module
	Version   string           // Version of the module
	Dir       string           // Directory containing the module source
	IsLocal   bool             // True if the module is local (ie with a replace directive), false if it's from gocache
	GoModule  *packages.Module // The underlying golang module from [golang.org/x/tools/go/packages]
}

Metadata about a module, such as its version and location on the local file system.

func FindModule 

func FindModule[T any]() (*ModuleInfo, *gocode.UserType, error)

Finds and returns the module info for a type.

func FindPackageModule 

func FindPackageModule(pkgName string) (*ModuleInfo, error)

Get the module info for a package.

func GetModuleInfo 

func GetModuleInfo(moduleName string) (*ModuleInfo, error)

Get the info for a module. Better than reading the go.mod. Better than calling FindPackageModule because the root of the module doesn't need to be a golang package.

func (*ModuleInfo) String 

func (m *ModuleInfo) String() string

type ParsedField 

type ParsedField struct {
	gocode.Variable
	Struct   *ParsedStruct
	Position int
	Ast      *ast.Field
}

func (*ParsedField) Parse 

func (f *ParsedField) Parse() error

func (*ParsedField) String 

func (f *ParsedField) String() string

type ParsedFile 

type ParsedFile struct {
	Package          *ParsedPackage
	Name             string                   // Filename
	Path             string                   // Fully qualified path to the file
	PathInModule     string                   // Path within the module to the file
	AnonymousImports []*ParsedImport          // Import declarations that were imported with .
	NamedImports     map[string]*ParsedImport // Import declarations - map from shortname to fully qualified package import name
	Ast              *ast.File                // The AST of the file
}

func (*ParsedFile) LoadFuncs 

func (f *ParsedFile) LoadFuncs() error

Assumes that all structs and interfaces have been loaded for the package containing the file.

Loads the names of all funcs. If the func has a receiver type, then it is saved as a method on the appropriate struct; if it does not have a receiver type, then it is saved as a package func.

This does not parse the arguments or returns of the func

func (*ParsedFile) LoadImports 

func (f *ParsedFile) LoadImports() error

func (*ParsedFile) LoadStructsAndInterfaces 

func (f *ParsedFile) LoadStructsAndInterfaces() error

Looks for:

  • structs defined in the file
  • interfaces defined in the file
  • other user types defined in the file

Does not:

  • look for function declarations

func (*ParsedFile) LoadVars 

func (f *ParsedFile) LoadVars() error

Looks for:

  • vars declared

func (*ParsedFile) ResolveIdent 

func (f *ParsedFile) ResolveIdent(name string, typeParams ...string) gocode.TypeName

An ident can be:

  • a basic type, like int64, float32 etc.
  • any
  • a type declared locally within the file or package
  • a type imported with an `import . "package"` decl
  • a generic type from a struct or func's type params

func (*ParsedFile) ResolveSelector 

func (f *ParsedFile) ResolveSelector(packageShortName string, name string) gocode.TypeName

func (*ParsedFile) ResolveType 

func (f *ParsedFile) ResolveType(expr ast.Expr, typeParams ...string) gocode.TypeName

If the expr is in the context of a generic struct or func, typeParams provides the additional named type params

func (*ParsedFile) String 

func (f *ParsedFile) String() string

type ParsedFunc 

type ParsedFunc struct {
	gocode.Func
	File *ParsedFile
	Ast  *ast.FuncType
}

func (*ParsedFunc) AsConstructor 

func (f *ParsedFunc) AsConstructor() *gocode.Constructor

func (*ParsedFunc) Parse 

func (f *ParsedFunc) Parse() error

func (*ParsedFunc) String 

func (f *ParsedFunc) String() string

type ParsedImport 

type ParsedImport struct {
	File    *ParsedFile
	Package string
}

type ParsedInterface 

type ParsedInterface struct {
	File    *ParsedFile
	Ast     *ast.InterfaceType
	Name    string
	Methods map[string]*ParsedFunc
}

func (*ParsedInterface) ServiceInterface 

func (iface *ParsedInterface) ServiceInterface(ctx ir.BuildContext) *gocode.ServiceInterface

func (*ParsedInterface) String 

func (i *ParsedInterface) String() string

func (*ParsedInterface) Type 

func (iface *ParsedInterface) Type() *gocode.UserType

type ParsedModule 

type ParsedModule struct {
	ShortName string                    // Short name of the module
	Name      string                    // Fully qualified name of the module
	Version   string                    // Version of the module
	SrcDir    string                    // Fully qualified location of the module on the filesystem
	IsLocal   bool                      // Is this a local module or from the go cache?
	Modfile   *modfile.File             // The modfile File struct is sufficiently simple that we just use it directly
	Packages  map[string]*ParsedPackage // Map from fully qualified package name to ParsedPackage
}

func (*ParsedModule) Load 

func (mod *ParsedModule) Load() error

func (*ParsedModule) String 

func (mod *ParsedModule) String() string

type ParsedModuleSet 

type ParsedModuleSet struct {
	Modules    map[string]*ParsedModule // Map from FQ module name to module object
	ModuleDirs map[string]*ParsedModule // Map from module SrcDir to module object
	Parent     *ParsedModuleSet         // Another module set to consult for modules if not present in this one
}

Represents a set of code modules that have been parsed.

func New 

func New(parent *ParsedModuleSet) *ParsedModuleSet

Returns a new *ParsedModuleSet, optionally with a parent module set, which can be nil.

func (*ParsedModuleSet) Add 

func (set *ParsedModuleSet) Add(info *ModuleInfo) (*ParsedModule, error)

Adds a module to the parsed module set. This is the preferred method for adding modules, versus [AddModule].

info for a module can be acquired by calling FindPackageModule or FindModule

func (*ParsedModuleSet) AddModule 

func (set *ParsedModuleSet) AddModule(srcDir string) (*ParsedModule, error)

Manually parse and add a module to the parsed module set

If the srcDir has already been parsed, then this function will do nothing.

If [set.Parent] is not nil, then the module will be copied from [set.Parent] rather than re-parsed.

If [set] already contains a module with the same FQ module name as the one in srcDir then this function will return an error.

The parsed module will be assumed to be a local module; if it is not, then set [IsLocal] to false

func (*ParsedModuleSet) AddModules 

func (set *ParsedModuleSet) AddModules(srcDirs ...string) error

Manually parse and add multiple modules to the set.

Equivalent to calling [AddModule] for each srcDir. If a srcDir has already been parsed then it will not be re-parsed.

Returns an error if any of the modules cannot be parsed.

func (*ParsedModuleSet) AddWorkspace 

func (set *ParsedModuleSet) AddWorkspace(workspaceDir string) error

Parses and adds all modules in the specified workspaceDir

func (*ParsedModuleSet) FindInterface 

func (set *ParsedModuleSet) FindInterface(pkgName string, name string) (*ParsedInterface, error)

Looks up the specified interface, possibly searching for and parsing the package.

Returns an error if the package cannot be found or parsed.

Returns the *ParsedInterface if found, or nil if no such interface exists in the package.

func (*ParsedModuleSet) FindStruct 

func (set *ParsedModuleSet) FindStruct(pkgName string, name string) (*ParsedStruct, error)

Looks up the specified struct, possibly searching for and parsing the package.

Returns an error if the package cannot be found or parsed.

Returns the *ParsedStruct if found, or nil if no such struct exists in the package.

func (*ParsedModuleSet) GetPackage 

func (set *ParsedModuleSet) GetPackage(name string) (*ParsedPackage, error)

Gets the *ParsedPackage for the specified name, possibly searching for and parsing the package.

This method will return an error if the package was not found, or if there was a parse error

func (*ParsedModuleSet) String 

func (set *ParsedModuleSet) String() string

type ParsedPackage 

type ParsedPackage struct {
	Module        *ParsedModule
	Name          string                      // Fully qualified name of the package including module name
	ShortName     string                      // Shortname of the package (ie, the name used in an import statement)
	PackageDir    string                      // Subdirectory within the module containing the package
	SrcDir        string                      // Fully qualified location of the package on the filesystem
	Files         map[string]*ParsedFile      // Map from filename to ParsedFile
	Ast           *ast.Package                // The AST of the package
	DeclaredTypes map[string]gocode.UserType  // Types declared within this package
	Structs       map[string]*ParsedStruct    // Structs parsed from this package
	Interfaces    map[string]*ParsedInterface // Interfaces parsed from this package
	Funcs         map[string]*ParsedFunc      // Functions parsed from this package (does not include funcs with receiver types)
	Vars          map[string]*ParsedVar       // Vars declared in this package; we save their AST but don't process them
}

func (*ParsedPackage) Load 

func (pkg *ParsedPackage) Load() error

func (*ParsedPackage) Parse 

func (pkg *ParsedPackage) Parse() error

func (*ParsedPackage) String 

func (pkg *ParsedPackage) String() string

type ParsedStruct 

type ParsedStruct struct {
	File            *ParsedFile
	Ast             *ast.StructType
	Name            string
	Methods         map[string]*ParsedFunc  // Methods declared directly on this struct, does not include promoted methods (not implemented yet)
	FieldsList      []*ParsedField          // All fields in the order that they are declared
	Fields          map[string]*ParsedField // Named fields declared in this struct only, does not include promoted fields (not implemented yet)
	PromotedField   *ParsedField            // If there is a promoted field, stored here
	AnonymousFields []*ParsedField          // Subsequent anonymous fields
	TypeParams      []string                // Names of generic type parameters
}

func (*ParsedStruct) String 

func (f *ParsedStruct) String() string

func (*ParsedStruct) Type 

func (struc *ParsedStruct) Type() *gocode.UserType

type ParsedVar 

type ParsedVar struct {
	File *ParsedFile
	Name string
	Ast  *ast.ValueSpec
}

Currently we save var statements but don't do anything with them

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