Fix: Respect early SIGINT during graph walk #37921
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Previously, Terraform would not respect a SIGINT (Ctrl+C) if it occurred during the graph walk phase, specifically if a provider operation was about to start or blocked. This was because the context cancellation was not being propagated effectively to the graph walker or checked before starting new operations. This commit introduces a StopContext to the Terraform Core Context, which is linked to the operation's stop context. The GraphWalker now checks this context before executing nodes. Additionally, the local backend now properly sets this context and handles early cancellation by returning immediately if the context is cancelled during the plan phase. A regression test TestLocal_applyStopEarly has been added to verify that the operation aborts immediately when cancelled. Fixes hashicorp#31371
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Previously, Terraform would not respect a SIGINT (Ctrl+C) if it occurred during the graph walk phase, specifically if a provider operation was about to start or blocked. This was because the context cancellation was not being propagated effectively to the graph walker or checked before starting new operations.
This commit introduces a StopContext to the Terraform Core Context, which is linked to the operation's stop context. The GraphWalker now checks this context before executing nodes. Additionally, the local backend now properly sets this context and handles early cancellation by returning immediately if the context is cancelled during the plan phase.
A regression test TestLocal_applyStopEarly has been added to verify that the operation aborts immediately when cancelled.
Fixes #31371
Target Release
1.14.x
Rollback Plan
Changes to Security Controls
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CHANGELOG entry