0fa60c68fb
* Drop the iso_checksum_type & iso_checksum_url fields
In favor of simply using iso_checksum that will know what to do.
* fix after master merge
* Update builder_test.go
* Update builder_test.go
* Update builder_test.go
* Update builder_test.go
* Update builder_test.go
* remove checksum lowercasing tests
* Update builder_test.go
* Update builder_test.go
* better docs
* Update builder_test.go
* even better docs
* Update config.go
* Update builder_test.go
* Update step_create_vmx_test.go
* make generate
* better docs
* fix imports
* up tests
* Update _ISOConfig-required.html.md
* Update builder_test.go
* don't use sha1.Sum("none") as a caching path
* Update builder_test.go
* better docs
* Update iso_config_test.go
remove ISOChecksumType/ISOChecksumURL references
* Update step_download_test.go
* add iso_checksum_url and iso_checksum_type fixers + tests
* add concrete examples of checksum values
* add examples of checksumming from local file
* update go-getter dep
* up deps
* use new go-getter version
* up ESX5Driver.VerifyChecksum: use go-getter's checksumming
* ISOConfig.Prepare: get checksum there in case we need it as a string in ESX5Driver.VerifyChecksum
* Update iso_config.go
* get go-getter from v2 branch
* Update driver_esx5.go
add more comments
* Update driver_esx5.go
* show better error message when the checksum is invalid
* Update builder_test.go
put in a valid checksum to fix tests, checksum is md5("packer")
* Update builder_test.go
test invalid and valid checksum
* more test updating
* fix default md5 string to be a valid md5
* TestChecksumFileNameMixedCaseBug: use 'file:' prefix for file checksumming
* Update iso_config_test.go
* Update iso_config_test.go
* Update builder_test.go
* Update builder_test.go
* Update builder_test.go
* Update CHANGELOG.md
* Update CHANGELOG.md
* Update go.mod
* Update go.mod
* Update CHANGELOG.md
33 lines
845 B
Go
33 lines
845 B
Go
package functions
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import (
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"honnef.co/go/tools/ir"
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)
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// IsStub reports whether a function is a stub. A function is
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// considered a stub if it has no instructions or if all it does is
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// return a constant value.
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func IsStub(fn *ir.Function) bool {
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for _, b := range fn.Blocks {
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for _, instr := range b.Instrs {
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switch instr.(type) {
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case *ir.Const:
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// const naturally has no side-effects
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case *ir.Panic:
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// panic is a stub if it only uses constants
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case *ir.Return:
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// return is a stub if it only uses constants
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case *ir.DebugRef:
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case *ir.Jump:
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// if there are no disallowed instructions, then we're
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// only jumping to the exit block (or possibly
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// somewhere else that's stubby?)
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default:
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// all other instructions are assumed to do actual work
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return false
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}
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}
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}
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return true
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}
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