build: change beta numbering to be semver compatible - Fixes rclone#4516

From now on the betas will be numbered for the version that they will
become, so:

v1.53.0-beta.NNNN.CCCCC

Where N is commit number and C is commit. When released this will
become v1.53.0 and the beta will become v1.54.0-beta.NNN.CCCCC.

The commit number is the count of the commits since the root of the
tree since we can no longer use the the git version numbers since the
last tag.

This will simplify building the stable branch but that release
procedure hasn't been revised yet.

This commit also injects the name of the branch for the beta builds
into the download path.

Makefile

@@ -7,24 +7,26 @@ RELEASE_TAG := $(shell git tag -l --points-at HEAD)
 VERSION := $(shell cat VERSION)
 # Last tag on this branch
 LAST_TAG := $(shell git describe --tags --abbrev=0)
+# Next version
+NEXT_VERSION := $(shell echo $(VERSION) | perl -lpe 's/v//; $$_ += 0.01; $$_ = sprintf("v%.2f.0", $$_)')
 # If we are working on a release, override branch to master
 ifdef RELEASE_TAG
 	BRANCH := master
+	LAST_TAG := $(shell git describe --abbrev=0 --tags $(VERSION)^)
 endif
-TAG_BRANCH := -$(BRANCH)
-BRANCH_PATH := branch/
+TAG_BRANCH := .$(BRANCH)
+BRANCH_PATH := branch/$(BRANCH)/
 # If building HEAD or master then unset TAG_BRANCH and BRANCH_PATH
 ifeq ($(subst HEAD,,$(subst master,,$(BRANCH))),)
 	TAG_BRANCH :=
 	BRANCH_PATH :=
 endif
-# Make version suffix -DDD-gCCCCCCCC (D=commits since last relase, C=Commit) or blank
-VERSION_SUFFIX := $(shell git describe --abbrev=8 --tags | perl -lpe 's/^v\d+\.\d+\.\d+//; s/^-(\d+)/"-".sprintf("%03d",$$1)/e;')
-# TAG is current version + number of commits since last release + branch
+# Make version suffix -beta.NNNN.CCCCCCCC (N=Commit number, C=Commit)
+VERSION_SUFFIX := -beta.$(shell git rev-list --count HEAD).$(shell git show --no-patch --no-notes --pretty='%h' HEAD)
+# TAG is current version + commit number + commit + branch
 TAG := $(VERSION)$(VERSION_SUFFIX)$(TAG_BRANCH)
-NEXT_VERSION := $(shell echo $(VERSION) | perl -lpe 's/v//; $$_ += 0.01; $$_ = sprintf("v%.2f.0", $$_)')
-ifndef RELEASE_TAG
-	TAG := $(TAG)-beta
+ifdef RELEASE_TAG
+	TAG := $(RELEASE_TAG)
 endif
 GO_VERSION := $(shell go version)
 ifdef BETA_SUBDIR
@@ -56,7 +58,6 @@ vars:
 	@echo BRANCH="'$(BRANCH)'"
 	@echo TAG="'$(TAG)'"
 	@echo VERSION="'$(VERSION)'"
-	@echo NEXT_VERSION="'$(NEXT_VERSION)'"
 	@echo GO_VERSION="'$(GO_VERSION)'"
 	@echo BETA_URL="'$(BETA_URL)'"
 
@@ -220,25 +221,24 @@ fetch_binaries:
 serve:	website
 	cd docs && hugo server -v -w --disableFastRender
 
-tag:	doc
-	@echo "Old tag is $(VERSION)"
-	@echo "New tag is $(NEXT_VERSION)"
-	echo -e "package fs\n\n// Version of rclone\nvar Version = \"$(NEXT_VERSION)\"\n" | gofmt > fs/version.go
-	echo -n "$(NEXT_VERSION)" > docs/layouts/partials/version.html
-	echo "$(NEXT_VERSION)" > VERSION
-	git tag -s -m "Version $(NEXT_VERSION)" $(NEXT_VERSION)
-	bin/make_changelog.py $(LAST_TAG) $(NEXT_VERSION) > docs/content/changelog.md.new
+tag:	retag doc
+	bin/make_changelog.py $(LAST_TAG) $(VERSION) > docs/content/changelog.md.new
 	mv docs/content/changelog.md.new docs/content/changelog.md
 	@echo "Edit the new changelog in docs/content/changelog.md"
 	@echo "Then commit all the changes"
-	@echo git commit -m \"Version $(NEXT_VERSION)\" -a -v
+	@echo git commit -m \"Version $(VERSION)\" -a -v
 	@echo "And finally run make retag before make cross etc"
 
 retag:
+	@echo "Version is $(VERSION)"
 	git tag -f -s -m "Version $(VERSION)" $(VERSION)
 
 startdev:
-	echo -e "package fs\n\n// Version of rclone\nvar Version = \"$(VERSION)-DEV\"\n" | gofmt > fs/version.go
+	@echo "Version is $(VERSION)"
+	@echo "Next version is $(NEXT_VERSION)"
+	echo -e "package fs\n\n// Version of rclone\nvar Version = \"$(NEXT_VERSION)-DEV\"\n" | gofmt > fs/version.go
+	echo -n "$(NEXT_VERSION)" > docs/layouts/partials/version.html
+	echo "$(NEXT_VERSION)" > VERSION
 	git commit -m "Start $(VERSION)-DEV development" fs/version.go
 
 winzip:

RELEASE.md

@@ -69,6 +69,8 @@ this will be done already.
 
 Now
 
+  * FIXME this is now broken with new semver layout - needs fixing
+  * FIXME the TAG=${NEW_TAG} shouldn't be necessary any more
   * git co ${BASE_TAG}-stable
   * git cherry-pick any fixes
   * Test (see above)

VERSION

@@ -1 +1 @@
-v1.52.3
+v1.53.0

docs/content/downloads.md

@@ -38,16 +38,25 @@ Beta releases
 [Beta releases](https://beta.rclone.org) are generated from each commit
 to master.  Note these are named like
 
-    {Version Tag}-{Commit Number}-g{Git Commit Hash}
+    {Version Tag}.beta.{Commit Number}.{Git Commit Hash}
 
-You can match the `Git Commit Hash` up with the [git
-log](https://github.com/rclone/rclone/commits/master).  The most recent
-release will have the largest `Version Tag` and `Commit Number` and
-will normally be at the end of the list.
+eg
+
+    v1.53.0-beta.4677.b657a2204
+
+The `Version Tag` is the version that the beta release will become
+when it is released. You can match the `Git Commit Hash` up with the
+[git log](https://github.com/rclone/rclone/commits/master).  The most
+recent release will have the largest `Version Tag` and `Commit Number`
+and will normally be at the end of the list.
 
 Some beta releases may have a branch name also:
 
-    {Version Tag}-{Commit Number}-g{Git Commit Hash}-{Branch Name}
+    {Version Tag}-beta.{Commit Number}.{Git Commit Hash}.{Branch Name}
+
+eg
+
+    v1.53.0-beta.4677.b657a2204.semver
 
 The presence of `Branch Name` indicates that this is a feature under
 development which will at some point be merged into the normal betas

docs/layouts/partials/version.html

@@ -1 +1 @@
-v1.52.0
+v1.53.0