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62 lines
2.2 KiB
Go
62 lines
2.2 KiB
Go
package config
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import "github.com/blang/semver"
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// ProviderVersionConstraint presents a constraint for a particular
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// provider, identified by its full name.
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type ProviderVersionConstraint struct {
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Constraint string
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ProviderType string
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}
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// ProviderVersionConstraints is a map from provider full name to its associated
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// ProviderVersionConstraint, as produced by Config.RequiredProviders.
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type ProviderVersionConstraints map[string]ProviderVersionConstraint
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// RequiredRanges returns a semver.Range for each distinct provider type in
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// the constraint map. If the same provider type appears more than once
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// (e.g. because aliases are in use) then their respective constraints are
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// combined such that they must *all* apply.
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//
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// The result of this method can be passed to the
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// PluginMetaSet.ConstrainVersions method within the plugin/discovery
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// package in order to filter down the available plugins to those which
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// satisfy the given constraints.
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//
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// This function will panic if any of the constraints within cannot be
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// parsed as semver ranges. This is guaranteed to never happen for a
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// constraint set that was built from a configuration that passed validation.
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func (cons ProviderVersionConstraints) RequiredRanges() map[string]semver.Range {
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ret := make(map[string]semver.Range, len(cons))
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for _, con := range cons {
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spec := semver.MustParseRange(con.Constraint)
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if existing, exists := ret[con.ProviderType]; exists {
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ret[con.ProviderType] = existing.AND(spec)
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} else {
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ret[con.ProviderType] = spec
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}
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}
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return ret
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}
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// ProviderConfigsByFullName returns a map from provider full names (as
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// returned by ProviderConfig.FullName()) to the corresponding provider
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// configs.
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//
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// This function returns no new information than what's already in
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// c.ProviderConfigs, but returns it in a more convenient shape. If there
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// is more than one provider config with the same full name then the result
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// is undefined, but that is guaranteed not to happen for any config that
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// has passed validation.
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func (c *Config) ProviderConfigsByFullName() map[string]*ProviderConfig {
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ret := make(map[string]*ProviderConfig, len(c.ProviderConfigs))
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for _, pc := range c.ProviderConfigs {
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ret[pc.FullName()] = pc
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}
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return ret
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}
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