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Previously the behavior for loading and installing modules was included in the same package as the representation of the module tree (in the config/module package). In our new world, the model of a module tree (now called a "Config") is included in "configs" along with the Module and File structs. This new package replaces the loading and installation functionality previously in config/module with new equivalents that work with the model objects in "configs". As of this commit, only the loading functionality is implemented. The installation functionality will follow in subsequent commits.
98 lines
3.6 KiB
Go
98 lines
3.6 KiB
Go
package configload
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import (
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"fmt"
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version "github.com/hashicorp/go-version"
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"github.com/hashicorp/hcl2/hcl"
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"github.com/hashicorp/terraform/configs"
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)
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// LoadConfig reads the Terraform module in the given directory and uses it as the
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// root module to build the static module tree that represents a configuration,
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// assuming that all required descendent modules have already been installed.
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//
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// If error diagnostics are returned, the returned configuration may be either
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// nil or incomplete. In the latter case, cautious static analysis is possible
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// in spite of the errors.
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//
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// LoadConfig performs the basic syntax and uniqueness validations that are
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// required to process the individual modules, and also detects
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func (l *Loader) LoadConfig(rootDir string) (*configs.Config, hcl.Diagnostics) {
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rootMod, diags := l.parser.LoadConfigDir(rootDir)
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if rootMod == nil {
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return nil, diags
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}
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cfg, cDiags := configs.BuildConfig(rootMod, configs.ModuleWalkerFunc(l.moduleWalkerLoad))
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diags = append(diags, cDiags...)
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return cfg, diags
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}
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// moduleWalkerLoad is a configs.ModuleWalkerFunc for loading modules that
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// are presumed to have already been installed. A different function
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// (moduleWalkerInstall) is used for installation.
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func (l *Loader) moduleWalkerLoad(req *configs.ModuleRequest) (*configs.Module, *version.Version, hcl.Diagnostics) {
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// Since we're just loading here, we expect that all referenced modules
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// will be already installed and described in our manifest. However, we
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// do verify that the manifest and the configuration are in agreement
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// so that we can prompt the user to run "terraform init" if not.
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key := manifestKey(req.Path)
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record, exists := l.modules.manifest[key]
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if !exists {
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return nil, nil, hcl.Diagnostics{
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{
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Severity: hcl.DiagError,
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Summary: "Module not installed",
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Detail: "This module is not yet installed. Run \"terraform init\" to install all modules required by this configuration.",
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Subject: &req.CallRange,
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},
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}
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}
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var diags hcl.Diagnostics
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// Check for inconsistencies between manifest and config
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if req.SourceAddr != record.SourceAddr {
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diags = append(diags, &hcl.Diagnostic{
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Severity: hcl.DiagError,
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Summary: "Module source has changed",
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Detail: "The source address was changed since this module was installed. Run \"terraform init\" to install all modules required by this configuration.",
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Subject: &req.SourceAddrRange,
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})
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}
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if !req.VersionConstraint.Required.Check(record.Version) {
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diags = append(diags, &hcl.Diagnostic{
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Severity: hcl.DiagError,
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Summary: "Module version requirements have changed",
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Detail: fmt.Sprintf(
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"The version requirements have changed since this module was installed and the installed version (%s) is no longer acceptable. Run \"terraform init\" to install all modules required by this configuration.",
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record.Version,
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),
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Subject: &req.SourceAddrRange,
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})
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}
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mod, mDiags := l.parser.LoadConfigDir(record.Dir)
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diags = append(diags, mDiags...)
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if mod == nil {
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// nil specifically indicates that the directory does not exist or
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// cannot be read, so in this case we'll discard any generic diagnostics
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// returned from LoadConfigDir and produce our own context-sensitive
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// error message.
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return nil, nil, hcl.Diagnostics{
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{
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Severity: hcl.DiagError,
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Summary: "Module not installed",
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Detail: fmt.Sprintf("This module's local cache directory %s could not be read. Run \"terraform init\" to install all modules required by this configuration.", record.Dir),
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Subject: &req.CallRange,
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},
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}
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}
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return mod, record.Version, diags
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}
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