Diff kernel configs, but keep the config tree structure for easier comparison
When kernel configs are diffed it's hard to view the tree structure of kenrel config. /scripts/diffconfig from kernel does not preserve tree structure as well.
This tool aims to alleviate that: 2 kernels configs are parsed and CONFIG_ vairables are stored in a tree (https://anytree.readthedocs.io/en/latest/) structure based on # comments that do not have CONFIG_.
Then CONFIG_ that have the same common value are removed from both trees.
Finally, pruned trees are saved in txt files for easier diff-ing with GUI tools like meld.
This will help you spot the differences and the position of CONFIG_ attribute within xconfig or menuconfig so that you can change them easily.
Usage:
kernel-config-diff.py oldconfig newconfig oldtree.txt newtree.txt
Meld text filter to ingore leading spaces/tree characters: ^[ \t\r\f\v\|\-\+]*
Sample output of a txt tree:
./current_config
+- Automatically generated file; DO NOT EDIT.
+- Linux/x86 6.1.27 Kernel Configuration
|- CONFIG_CC_VERSION_TEXT:"gcc"
|- CONFIG_GCC_VERSION:120201
|- CONFIG_PAHOLE_VERSION:0
|- General setup
| |- CONFIG_LOCALVERSION:"-x86_64"
| |- CONFIG_LOCALVERSION_AUTO:is not set
| |- CONFIG_KERNEL_LZ4:y
| |- CONFIG_KERNEL_ZSTD:is not set
| |- CONFIG_DEFAULT_HOSTNAME:"(none)"
| |- CONFIG_USELIB:y
| |- IRQ subsystem
| |- Timers subsystem
| |- BPF subsystem
| |- CPU/Task time and stats accounting
| |- RCU Subsystem
| | +- CONFIG_FORCE_TASKS_TRACE_RCU:is not set
| |- CONFIG_PRINTK_INDEX:is not set
| |- Scheduler features
| |- CONFIG_GCC11_NO_ARRAY_BOUNDS:y
| |- CONFIG_SCHED_BORE:y
| |- CONFIG_SCHED_AUTOGROUP:is not set
| |- CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE:y
| |- CONFIG_EXPERT:y
| |- CONFIG_DEBUG_RSEQ:is not set
| |- CONFIG_PC104:y
| +- Kernel Performance Events And Counters
|- Processor type and features
| |- CONFIG_X86_EXTENDED_PLATFORM:y
| |- CONFIG_X86_NUMACHIP:y
| |- CONFIG_X86_VSMP:is not set
| |- CONFIG_X86_UV:is not set
| |- CONFIG_X86_GOLDFISH:is not set
| |- CONFIG_X86_INTEL_MID:is not set
| |- CONFIG_IOSF_MBI_DEBUG:y
| |- CONFIG_PARAVIRT_TIME_ACCOUNTING:is not set
| |- CONFIG_GENERIC_CPU:is not set
| |- CONFIG_MNATIVE_INTEL:y
| |- CONFIG_X86_INTEL_USERCOPY:y
| |- CONFIG_X86_USE_PPRO_CHECKSUM:y
| |- CONFIG_X86_P6_NOP:y
| |- CONFIG_PROCESSOR_SELECT:y
| |- CONFIG_GART_IOMMU:y
| |- CONFIG_NR_CPUS:64
| |- CONFIG_X86_MCELOG_LEGACY:y
| |- Performance monitoring
| | |- CONFIG_PERF_EVENTS_INTEL_UNCORE:y
| | |- CONFIG_PERF_EVENTS_AMD_POWER:is not set
| | +- CONFIG_PERF_EVENTS_AMD_BRS:is not set
| |- CONFIG_X86_PMEM_LEGACY:y
| |- CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT:1
| |- CONFIG_X86_INTEL_TSX_MODE_ON:y
| |- CONFIG_X86_INTEL_TSX_MODE_AUTO:is not set
| |- CONFIG_HZ_300:is not set
| |- CONFIG_HZ_500:y
| +- CONFIG_HZ:500
|- Power management and ACPI options
...
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