Potentially fetch backend variables for most commands

* modules
* providers
* providers lock
* providers mirror
* validate
* state mv
* state pull
* state push
* state replace provider
* state rm
* taint
* get

internal/command/get.go

@@ -51,6 +51,12 @@ func (c *GetCommand) Run(args []string) int {
 		return 1
 	}
 
+	diags = diags.Append(c.resolveConstVariables(path, arguments.ViewHuman))
+	if diags.HasErrors() {
+		c.showDiagnostics(diags)
+		return 1
+	}
+
 	path = c.normalizePath(path)
 
 	abort, moreDiags := getModules(ctx, &c.Meta, path, parsedArgs.TestDirectory, parsedArgs.Update)

internal/command/meta.go

@@ -831,6 +831,11 @@ func (m *Meta) checkRequiredVersion() tfdiags.Diagnostics {
 		return diags
 	}
 
+	diags = diags.Append(m.resolveConstVariables(pwd, arguments.ViewHuman))
+	if diags.HasErrors() {
+		return diags
+	}
+
 	config, configDiags := m.loadConfig(pwd)
 	if configDiags.HasErrors() {
 		diags = diags.Append(configDiags)

internal/command/modules.go

@@ -80,6 +80,12 @@ func (c *ModulesCommand) Run(rawArgs []string) int {
 		return 1
 	}
 
+	diags = diags.Append(c.resolveConstVariables(rootModPath, args.ViewType))
+	if diags.HasErrors() {
+		view.Diagnostics(diags)
+		return 1
+	}
+
 	config, confDiags := c.loadConfig(rootModPath)
 	// Here we check if there are any uninstalled dependencies
 	versionDiags := terraform.CheckCoreVersionRequirements(config)

internal/command/providers.go

@@ -84,6 +84,12 @@ func (c *ProvidersCommand) Run(args []string) int {
 		return 1
 	}
 
+	diags = diags.Append(c.resolveConstVariables(configPath, arguments.ViewHuman))
+	if diags.HasErrors() {
+		c.showDiagnostics(diags)
+		return 1
+	}
+
 	config, configDiags := c.loadConfigWithTests(configPath, parsedArgs.TestsDirectory)
 	diags = diags.Append(configDiags)
 	if configDiags.HasErrors() {

internal/command/providers_lock.go

@@ -116,6 +116,12 @@ func (c *ProvidersLockCommand) Run(args []string) int {
 		return 1
 	}
 
+	diags = diags.Append(c.resolveConstVariables(".", arguments.ViewHuman))
+	if diags.HasErrors() {
+		c.showDiagnostics(diags)
+		return 1
+	}
+
 	config, confDiags := c.loadConfigWithTests(".", parsedArgs.TestsDirectory)
 	diags = diags.Append(confDiags)
 	reqs, hclDiags := config.ProviderRequirements()

internal/command/providers_mirror.go

@@ -78,6 +78,12 @@ func (c *ProvidersMirrorCommand) Run(args []string) int {
 		return 1
 	}
 
+	diags = diags.Append(c.resolveConstVariables(".", arguments.ViewHuman))
+	if diags.HasErrors() {
+		c.showDiagnostics(diags)
+		return 1
+	}
+
 	config, confDiags := c.loadConfig(".")
 	diags = diags.Append(confDiags)
 	reqs, moreDiags := config.ProviderRequirements()

internal/command/validate.go

@@ -101,6 +101,11 @@ func (c *ValidateCommand) validate(dir string) tfdiags.Diagnostics {
 	var diags tfdiags.Diagnostics
 	var cfg *configs.Config
 
+	diags = diags.Append(c.resolveConstVariables(dir, c.ParsedArgs.ViewType))
+	if diags.HasErrors() {
+		return diags
+	}
+
 	if c.ParsedArgs.NoTests {
 		cfg, diags = c.loadConfig(dir)
 	} else {