(+semver: fix) revert go-git backend to v4 for CI compatibility

README.md

@@ -59,7 +59,7 @@ You can also override the name and location of this file by providing the settin
 
 gogitver uses the repository's primary branch as the stable version baseline. By default it looks for `main`, `master`, `origin/main`, then `origin/master`. For a single branch name, a local ref is preferred over its remote counterpart (a local `main` is used before `origin/main`).
 
-If both a `main` and a `master` branch exist anywhere — local or remote, in any combination — gogitver refuses to guess the version baseline and requires an explicit primary branch. This prevents it from silently switching the baseline during a branch migration:
+If both a `main` and a `master` branch exist anywhere - local or remote, in any combination - gogitver refuses to guess the version baseline and requires an explicit primary branch. This prevents it from silently switching the baseline during a branch migration:
 
 ```sh
 gogitver --primary-branch=main
@@ -69,6 +69,10 @@ The `--primary-branch` value also takes a local ref or `origin/<name>`, so you c
 
 Use `--forbid-behind-primary` to error when the current branch calculates a version lower than the resolved primary branch. The older `--forbid-behind-master` flag remains available as a deprecated compatibility alias.
 
+### CI note
+
+gogitver currently stays on `go-git` v4 for compatibility with CI checkouts that use shared or alternate git object stores. We tested `go-git` v5 during modernization, but some agent workspaces that worked with v4 failed to load primary branch commits under v5 even though native `git` commands still worked.
+
 ## Development
 
 ### Requirements

cmd/gogitver/cmd/root.go

@@ -10,7 +10,7 @@ import (
 	"github.com/spf13/cobra"
 	"github.com/syncromatics/gogitver/pkg/git"
 
-	gogit "github.com/go-git/go-git/v5"
+	gogit "gopkg.in/src-d/go-git.v4"
 )
 
 var rootCmd = &cobra.Command{

go.mod

@@ -4,36 +4,32 @@ go 1.26.3
 
 require (
 	github.com/coreos/go-semver v0.3.1
-	github.com/go-git/go-billy/v5 v5.9.0
-	github.com/go-git/go-git/v5 v5.19.1
 	github.com/pkg/errors v0.9.1
 	github.com/spf13/cobra v1.10.2
 	github.com/stretchr/testify v1.11.1
+	gopkg.in/src-d/go-billy.v4 v4.2.1
+	gopkg.in/src-d/go-git.v4 v4.7.1
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
-	dario.cat/mergo v1.0.0 // indirect
-	github.com/Microsoft/go-winio v0.6.2 // indirect
-	github.com/ProtonMail/go-crypto v1.1.6 // indirect
-	github.com/cloudflare/circl v1.6.3 // indirect
-	github.com/cyphar/filepath-securejoin v0.6.1 // indirect
+	github.com/Microsoft/go-winio v0.5.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
-	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
-	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
+	github.com/gliderlabs/ssh v0.3.8 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
-	github.com/kevinburke/ssh_config v1.2.0 // indirect
-	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
-	github.com/pjbgf/sha1cd v0.6.0 // indirect
+	github.com/kevinburke/ssh_config v0.0.0-20180830205328-81db2a75821e // indirect
+	github.com/mitchellh/go-homedir v1.1.0 // indirect
+	github.com/pelletier/go-buffruneio v0.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
-	github.com/skeema/knownhosts v1.3.1 // indirect
+	github.com/sergi/go-diff v1.4.0 // indirect
 	github.com/spf13/pflag v1.0.9 // indirect
+	github.com/src-d/gcfg v1.3.0 // indirect
 	github.com/xanzy/ssh-agent v0.3.3 // indirect
 	golang.org/x/crypto v0.50.0 // indirect
 	golang.org/x/net v0.53.0 // indirect
 	golang.org/x/sys v0.43.0 // indirect
+	golang.org/x/text v0.36.0 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
 )

go.sum

@@ -1,93 +1,76 @@
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-github.com/Microsoft/go-winio v0.6.2 h1:F2VQgta7ecxGYO8k3ZZz3RS8fVIXVxONVUPlNERoyfY=
-github.com/Microsoft/go-winio v0.6.2/go.mod h1:yd8OoFMLzJbo9gZq8j5qaps8bJ9aShtEA8Ipt1oGCvU=
-github.com/ProtonMail/go-crypto v1.1.6 h1:ZcV+Ropw6Qn0AX9brlQLAUXfqLBc7Bl+f/DmNxpLfdw=
-github.com/ProtonMail/go-crypto v1.1.6/go.mod h1:rA3QumHc/FZ8pAHreoekgiAbzpNsfQAosU5td4SnOrE=
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+golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
 golang.org/x/crypto v0.50.0 h1:zO47/JPrL6vsNkINmLoo/PH1gcxpls50DNogFvB5ZGI=
 golang.org/x/crypto v0.50.0/go.mod h1:3muZ7vA7PBCE6xgPX7nkzzjiUq87kRItoJQM1Yo8S+Q=
-golang.org/x/exp v0.0.0-20260410095643-746e56fc9e2f h1:W3F4c+6OLc6H2lb//N1q4WpJkhzJCK5J6kUi1NTVXfM=
-golang.org/x/exp v0.0.0-20260410095643-746e56fc9e2f/go.mod h1:J1xhfL/vlindoeF/aINzNzt2Bket5bjo9sdOYzOsU80=
+golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.53.0 h1:d+qAbo5L0orcWAr0a9JweQpjXF19LMXJE8Ey7hwOdUA=
 golang.org/x/net v0.53.0/go.mod h1:JvMuJH7rrdiCfbeHoo3fCQU24Lf5JJwT9W3sJFulfgs=
+golang.org/x/sys v0.0.0-20180903190138-2b024373dcd9/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -99,14 +82,21 @@ golang.org/x/sys v0.43.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.42.0 h1:UiKe+zDFmJobeJ5ggPwOshJIVt6/Ft0rcfrXZDLWAWY=
 golang.org/x/term v0.42.0/go.mod h1:Dq/D+snpsbazcBG5+F9Q1n2rXV8Ma+71xEjTRufARgY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.36.0 h1:JfKh3XmcRPqZPKevfXVpI1wXPTqbkE5f7JA92a55Yxg=
 golang.org/x/text v0.36.0/go.mod h1:NIdBknypM8iqVmPiuco0Dh6P5Jcdk8lJL0CUebqK164=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
-gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/src-d/go-billy.v4 v4.2.1 h1:omN5CrMrMcQ+4I8bJ0wEhOBPanIRWzFC953IiXKdYzo=
+gopkg.in/src-d/go-billy.v4 v4.2.1/go.mod h1:tm33zBoOwxjYHZIE+OV8bxTWFMJLrconzFMd38aARFk=
+gopkg.in/src-d/go-git-fixtures.v3 v3.1.1 h1:XWW/s5W18RaJpmo1l0IYGqXKuJITWRFuA45iOf1dKJs=
+gopkg.in/src-d/go-git-fixtures.v3 v3.1.1/go.mod h1:dLBcvytrw/TYZsNTWCnkNF2DSIlzWYqTe3rJR56Ac7g=
+gopkg.in/src-d/go-git.v4 v4.7.1 h1:phAV/kNULxfYEvyInGdPuq3U2MtPpJdgmtOUF3cghkQ=
+gopkg.in/src-d/go-git.v4 v4.7.1/go.mod h1:xrJH/YX8uSWewT6evfocf8qsivF18JgCN7/IMitOptY=
 gopkg.in/warnings.v0 v0.1.2 h1:wFXVbFY8DY5/xOe1ECiWdKCzZlxgshcYVNkBHstARME=
 gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

pkg/git/branchWalker.go

@@ -5,11 +5,11 @@ import (
 	"regexp"
 	"strings"
 
-	"github.com/go-git/go-git/v5/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing"
 
 	"github.com/coreos/go-semver/semver"
-	"github.com/go-git/go-git/v5"
-	"github.com/go-git/go-git/v5/plumbing/object"
+	"gopkg.in/src-d/go-git.v4"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 	"github.com/pkg/errors"
 )
 

pkg/git/git.go

@@ -9,9 +9,9 @@ import (
 	"strings"
 
 	"github.com/coreos/go-semver/semver"
-	git "github.com/go-git/go-git/v5"
-	"github.com/go-git/go-git/v5/plumbing"
-	"github.com/go-git/go-git/v5/plumbing/object"
+	git "gopkg.in/src-d/go-git.v4"
+	"gopkg.in/src-d/go-git.v4/plumbing"
+	"gopkg.in/src-d/go-git.v4/plumbing/object"
 	"github.com/pkg/errors"
 )
 
@@ -149,7 +149,13 @@ func getVersion(r *git.Repository, h *plumbing.Reference, tagMap map[string]stri
 
 	primaryCommit, err := r.CommitObject(primaryHead.Hash())
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to get primary branch commit from reference")
+		return nil, errors.Wrapf(
+			err,
+			"failed to load primary branch commit for branch '%s' from ref '%s' (%s); this checkout may be using an unsupported shared or alternate git object store",
+			primaryBranch,
+			primaryHead.Name().String(),
+			primaryHead.Hash().String(),
+		)
 	}
 
 	primaryWalker := newBranchWalker(r, primaryCommit, tagMap, settings, true, "", verbose)
@@ -249,15 +255,15 @@ func getPrimaryBranchReference(r *git.Repository, branchSettings *BranchSettings
 // resolvePrimaryCandidate reports whether a branch of the given name exists as a
 // local or remote ref, preferring the local ref when both are present.
 func resolvePrimaryCandidate(r *git.Repository, branchName string) (*plumbing.Reference, bool, error) {
-	localRef, hasLocal, err := getOptionalReference(r, plumbing.NewBranchReferenceName(branchName))
+	localRef, hasLocal, err := getOptionalReference(r, plumbing.ReferenceName("refs/heads/"+branchName))
 	if err != nil {
 		return nil, false, err
 	}
 	if hasLocal {
 		return localRef, true, nil
 	}
 
-	return getOptionalReference(r, plumbing.NewRemoteReferenceName("origin", branchName))
+	return getOptionalReference(r, plumbing.ReferenceName("refs/remotes/origin/"+branchName))
 }
 
 func getOptionalReference(r *git.Repository, referenceName plumbing.ReferenceName) (*plumbing.Reference, bool, error) {
@@ -273,12 +279,12 @@ func getOptionalReference(r *git.Repository, referenceName plumbing.ReferenceNam
 }
 
 func getBranchReference(r *git.Repository, branchName string) (*plumbing.Reference, error) {
-	ref, err := r.Reference(plumbing.NewBranchReferenceName(branchName), false)
+	ref, err := r.Reference(plumbing.ReferenceName("refs/heads/"+branchName), false)
 	if err == nil {
 		return ref, nil
 	}
 
-	ref, err = r.Reference(plumbing.NewRemoteReferenceName("origin", branchName), false)
+	ref, err = r.Reference(plumbing.ReferenceName("refs/remotes/origin/"+branchName), false)
 	if err == nil {
 		return ref, nil
 	}