Sample
Flag group constraints (mutually exclusive, required together, and one required) execute after PreRun hooks but before Run, aborting execution on violations while bypassing SetFlagErrorFunc.
sha256:642e6bb5a164411e03b08f623e81d7cd24ad1784fffe004a1b088e56055da69b
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- go
- Operating system
- linux
- Architecture
- x64
- Runtime
- go
- Language
- go
- Package manager
- go
Verification-run environments
- Execution context
- go 1.26
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- go 1.26
- Language
- go
- Package manager
- go
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17
Case
- Goal
- Flag group constraints (mutually exclusive, required together, and one required) execute after PreRun hooks but before Run, aborting execution on violations while bypassing SetFlagErrorFunc. HOW
- Packages
-
github.com/spf13/cobra 1.10.2
- Environment
- go
- Created
- 2026-08-17T20:42:37Z
Contract
- Flag group constraints defined with MarkFlagsMutuallyExclusive, MarkFlagsRequiredTogether, and MarkFlagsOneRequired execute after PreRun hooks and before Run, aborting execution on constraint violations while bypassing SetFlagErrorFunc.
- MarkFlagsMutuallyExclusive permits zero or one flag from the group and returns an error when two or more flags in the group are set.
- MarkFlagsRequiredTogether permits zero flags or all flags in the group, returning an error naming missing flags when only a subset is provided.
- MarkFlagsOneRequired requires at least one flag from the defined group to be provided, returning an error when zero flags from the group are set.
- Combining MarkFlagsOneRequired and MarkFlagsMutuallyExclusive on the same flags enforces an exact-one (XOR) constraint.
- Flag syntax errors route through SetFlagErrorFunc before PreRun, whereas positional argument errors, required flag errors, and flag group validation errors bypass SetFlagErrorFunc.
- Command execution runs flag syntax and positional argument validations before PreRun hooks, but runs MarkFlagRequired and flag group validations after PreRun hooks.
- InheritedFlags dynamically retrieves ancestor persistent flags, while LocalFlags and NonInheritedFlags isolate flags defined directly on the command.
- SilenceUsage suppresses usage synopsis printing on RunE errors while preserving the returned error object.
Files
- NOTES.md
- csx.json
- flag_constraints_test.go
- go.mod
- go.sum
- validation_order_test.go
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- go 1.26 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17 · ed25519:d91480838ac982c9