fix(platforms): do not run dynamic vars for other platforms

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## Unreleased
+
+- Fix bug where dynamic `vars:` and `env:` were being executed when they should
+  actually be skipped by `platforms:` (#1273, #1377 by @andreynering).
+
 ## v3.31.0 - 2023-10-07
 
 - Enabled the `--yes` flag for the

internal/goext/meta.go

@@ -32,6 +32,7 @@ var knownOS = map[string]struct{}{
 	"solaris":   {},
 	"windows":   {},
 	"zos":       {},
+	"__test__":  {},
 }
 
 var knownArch = map[string]struct{}{

task.go

@@ -160,7 +160,16 @@ func (e *Executor) splitRegularAndWatchCalls(calls ...taskfile.Call) (regularCal
 
 // RunTask runs a task by its name
 func (e *Executor) RunTask(ctx context.Context, call taskfile.Call) error {
-	t, err := e.CompiledTask(call)
+	t, err := e.FastCompiledTask(call)
+	if err != nil {
+		return err
+	}
+	if !shouldRunOnCurrentPlatform(t.Platforms) {
+		e.Logger.VerboseOutf(logger.Yellow, `task: %q not for current platform - ignored\n`, call.Task)
+		return nil
+	}
+
+	t, err = e.CompiledTask(call)
 	if err != nil {
 		return err
 	}
@@ -185,11 +194,6 @@ func (e *Executor) RunTask(ctx context.Context, call taskfile.Call) error {
 	}
 
 	return e.startExecution(ctx, t, func(ctx context.Context) error {
-		if !shouldRunOnCurrentPlatform(t.Platforms) {
-			e.Logger.VerboseOutf(logger.Yellow, `task: %q not for current platform - ignored\n`, call.Task)
-			return nil
-		}
-
 		e.Logger.VerboseErrf(logger.Magenta, "task: %q started\n", call.Task)
 		if err := e.runDeps(ctx, t); err != nil {
 			return err

testdata/platforms/Taskfile.yml

@@ -2,31 +2,37 @@ version: '3'
 
 tasks:
   build-windows:
+    deps: [failed-var-other-platform]
     platforms: [windows]
     cmds:
       - echo 'Running task on windows'
 
   build-darwin:
+    deps: [failed-var-other-platform]
     platforms: [darwin]
     cmds:
       - echo 'Running task on darwin'
 
   build-linux:
+    deps: [failed-var-other-platform]
     platforms: [linux]
     cmds:
       - echo 'Running task on linux'
 
   build-freebsd:
+    deps: [failed-var-other-platform]
     platforms: [freebsd]
     cmds:
       - echo 'Running task on freebsd'
 
   build-blank-os:
+    deps: [failed-var-other-platform]
     platforms: []
     cmds:
       - echo 'Running command'
 
   build-multiple:
+    deps: [failed-var-other-platform]
     platforms: []
     cmds:
       - cmd: echo 'Running command'
@@ -36,20 +42,30 @@ tasks:
         platforms: [darwin]
 
   build-amd64:
+    deps: [failed-var-other-platform]
     platforms: [amd64]
     cmds:
       - echo "Running command on amd64"
 
   build-arm64:
+    deps: [failed-var-other-platform]
     platforms: [arm64]
     cmds:
       - echo "Running command on arm64"
 
   build-mixed:
+    deps: [failed-var-other-platform]
     cmds:
       - cmd: echo 'building on windows/arm64'
         platforms: [windows/arm64]
       - cmd: echo 'building on linux/amd64'
         platforms: [linux/amd64]
       - cmd: echo 'building on darwin'
         platforms: [darwin]
+
+  failed-var-other-platform:
+    platforms: [__test__]
+    env:
+      EXAMPLE_VAR: {sh: exit 1}
+    vars:
+      EXAMPLE_VAR: {sh: exit 2}