motiejus/undocker
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add version info to the binary

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This commit is contained in:
Motiejus Jakštys 2021-08-24 07:02:12 +03:00
parent be668f21e8
commit 6dd7678e64
3 changed files with 30 additions and 22 deletions
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27
Makefile
View File

@ -2,19 +2,24 @@ GODEPS = $(shell git ls-files '*.go' go.mod go.sum)
GOBIN = $(shell go env GOPATH)/bin/
GOOSARCHS = $(sort \
linux/amd64 \
linux/arm64 \
darwin/amd64 \
darwin/arm64 \
linux/amd64 \
linux/arm64 \
windows/amd64/.exe \
)
windows/arm64/.exe)
VERSION = $(shell git describe --dirty)
LDFLAGS = -ldflags "-X main.Version=$(VERSION)"
VSN = $(shell git describe --dirty)
VSNHASH = $(shell git rev-parse --verify HEAD)
LDFLAGS = -ldflags "-X main.Version=$(VSN) -X main.VersionHash=$(VSNHASH)"
.PHONY: test
test:
go test -race -cover ./...
define undockertarget
UNDOCKERS += undocker-$(1)-$(2)-$(VERSION)-$(firstword $(3))
undocker-$(1)-$(2)-$(VERSION)$(firstword $(3)): $(GODEPS)
UNDOCKERS += undocker-$(1)-$(2)-$(VSN)$(firstword $(3))
undocker-$(1)-$(2)-$(VSN)$(firstword $(3)): $(GODEPS)
CGO_ENABLED=0 GOOS=$(1) GOARCH=$(2) go build $(LDFLAGS) -o $$@
endef
@ -22,11 +27,7 @@ $(foreach goosarch,$(GOOSARCHS),\
$(eval $(call undockertarget,$(word 1,$(subst /, ,$(goosarch))),$(word 2,$(subst /, ,$(goosarch))),$(word 3,$(subst /, ,$(goosarch))))))
.PHONY: all
all: $(UNDOCKERS) coverage.html
.PHONY: test
test:
go test -race -cover ./...
all: $(UNDOCKERS)
.PHONY: lint
lint: vet staticcheck
@ -54,4 +55,4 @@ sha256sum.txt.asc: sha256sum.txt
.PHONY: clean
clean:
rm -f $(UNDOCKERS) coverage.html sha256sum.txt sha256sum.txt.asc
rm -f undocker-*-v* coverage.html sha256sum.txt sha256sum.txt.asc

6
README.md
View File

@ -80,11 +80,7 @@ Similar Projects
Changelog
---------
**1.0.1**
* bugfix: add missing error check when opening the tarball.
**1.0**
**v1.0**
* initial release: `rootfs.Flatten` and a simple command-line application.

13
main.go
View File

@ -11,6 +11,9 @@ import (
"git.sr.ht/~motiejus/undocker/rootfs"
)
var Version = "unknown"
var VersionHash = "unknown"
const _usage = `Usage:
%s <infile> <outfile>
@ -19,13 +22,21 @@ Flatten a Docker container image to a root file system.
Arguments:
<infile>: Input Docker container. Tarball.
<outfile>: Output tarball, the root file system. '-' is stdout.
undocker %s (%s)
Built with %s
`
func main() {
runtime.GOMAXPROCS(1) // no need to create that many threads
if len(os.Args) != 3 {
fmt.Fprintf(os.Stderr, _usage, filepath.Base(os.Args[0]))
fmt.Fprintf(os.Stderr, _usage,
filepath.Base(os.Args[0]),
Version,
VersionHash,
runtime.Version(),
)
os.Exit(1)
}