ci: add version calc scripts

ci/calc-slm-version-bump.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+set -Eeuxo pipefail
+PS4='>>> '
+TOP="${PWD}"
+
+# This script is designed to be run from a Concourse Task with the following env vars
+# outputs the bumped version to stdout
+
+# Required env var inputs
+>&2 echo "            BRANCH:" "${BRANCH:?Usage: BRANCH=foo $0}"
+
+# Defaulted env var inputs - can override if necessary
+>&2 echo "           REPODIR:" "${REPODIR:=slm}"
+## By default, get the most recent previous tag on this branch from git
+### note: if multiple tags exist on one commit, git doesn't always desecribe the most recent one
+###    ### maybe use: git tag --sort=committerdate --contains HEAD~ | tail -1
+###    ### also maybe git log --format=%H | git name-rev --stdin --name-only --tags
+>&2 echo "           PREVTAG:" "${PREVTAG:=$(git -C "${REPODIR}" describe --tags --abbrev=0)}"
+[[ "$PREVTAG" == "" ]] && PREVTAG=0.0.0-initial.0
+
+## look for a change in the version number in slm.toml
+## and if it changed in the most recent commit, use that as the version
+### get the most recent commit, incuding merges
+### look for changes in slm.toml
+### if the version line was changed, extract the new version number
+>&2 echo "           TOMLVER:" "${TOMLVER:=$(git -C "${REPODIR}" log -1 -p -m  \
+                                                | filterdiff -p1 -i slm.toml \
+                                                | sed -E -n 's/^version = "(.*)"/\1/p'
+                                              )}"
+
+if [[ "${TOMLVER}" != "" ]] ; then
+    # the version in slm.toml was changed, so use that as the version
+    NEWVER=${TOMLVER}
+else
+    ## By default, bump the prerelease version using the branch name
+    ##   note the two dots after branch name are intentional
+    BRANCH_OR_RC="${BRANCH}"
+    if [[ "${BRANCH}" == "master" ]] ; then
+        # if the branch is "master", use the prerelease label "rc"
+        BRANCH_OR_RC="rc"
+    fi
+    >&2 echo "              BUMP:" "${BUMP:=prerel ${BRANCH_OR_RC}..}"
+
+    ## if the previous tag is a final version with no prerel suffix
+    ## then bump the patch version before adding a new suffix
+    if [[ "${PREVTAG}" == "$(semver get release ${PREVTAG})" ]] ; then
+        PREVTAG=$(semver bump patch ${PREVTAG})
+    fi
+
+    NEWVER=${PREVTAG}
+
+    # keep bumping until the tag doesn't exist
+    while [[ "${NEWVER}" == "${PREVTAG}" ]] || git -C "${REPODIR}" tag | grep -E -q "^${NEWVER}$" ; do
+        ## Bump the previous tag
+        BUMPEDTAG=$(semver bump ${BUMP} ${NEWVER})
+        >&2 echo "         BUMPEDTAG:" "${BUMPEDTAG}"
+
+        # calculate the new version tag by calling calc-slm-version.sh in the same
+        # directory as this script
+        NEWVER=$($(dirname $0)/calc-slm-version.sh "${BUMPEDTAG}" "${BRANCH}")
+        >&2 echo "            NEWVER:" ${NEWVER}
+    done
+fi
+
+echo ${NEWVER}

ci/calc-slm-version.sh

@@ -0,0 +1,68 @@
+#!/bin/bash
+set -Eeuxo pipefail
+PS4='>>> '
+
+# Given a SemVer version string and a branch name, modify the version number to match SLM version numbering practices
+
+# Given MAJ.MIN.PAT-TAG.SUF  such as  1.2.34-rc.56
+
+# Number of digits for PAT and SUF should be no more than 2 digits
+# For branch "master"
+#   the TAG part of the semver should be "rc"
+# For any other master
+#   the TAG part of the semver should be the branch name
+#   and the MAJ digit should be zero
+
+
+SEMVER=${1:?Usage: $0 1.2.34-foo.56 branchname}
+BRANCH=${2:?Usage: $0 1.2.34-foo.56 branchname}
+
+## Verify expected input format
+grep -E -q '^([0-9]*)\.([0-9]*)\.([0-9][0-9]?)(-((-|_|[a-z]|[A-Z]|[0-9])*)\.([0-9][0-9]?))?$' <<< $SEMVER || \
+    { printf "\n\n*** ERROR: input $SEMVER not in format 1.2.34-foo.56\n\n\n" && exit -2 ; }
+
+# MAJ.MIN.PAT-TAG.SUF
+# 0.12.0-foo.0 => 0.12.90000
+# 0.12.0-foo.3 => 0.12.90003
+# 0.12.3-foo.0 => 0.12.90300
+# 0.12.34-foo.56 => 0.12.93456
+# 0.12.345-foo.678 => fail
+MAJ=$(echo $SEMVER | cut -d. -f1)
+MIN=$(echo $SEMVER | cut -d. -f2)
+PAT=$(echo $SEMVER | cut -d. -f3 | cut -d- -f1)
+TAG=$(echo $SEMVER | cut -d. -f3 | cut -d- -f2-)
+SUF=$(echo $SEMVER | cut -d. -f4)
+
+[[ $BRANCH == "rc" ]] && \
+    printf "\n\n*** ERROR: branch name cannot be \"rc\"\n\n\n" && exit -2
+
+SLM_VERSION=$(printf "%d.%d.%d-%s.%d" "$MAJ" "$MIN" "$PAT" "$TAG" "$SUF")
+
+# If the branch is "master"
+if [[ "${BRANCH}" == "master" ]] ; then
+  # and the semver is a final release version 1.2.34
+  if [[ "${SEMVER}" == "${MAJ}.${MIN}.${PAT}" ]] ; then
+    # output the version unchanged
+    SLM_VERSION="${SEMVER}"
+  # else force the tag to be "rc"
+  else
+    TAG="rc"
+    SLM_VERSION=$(printf "%d.%d.%d-%s.%d" "$MAJ" "$MIN" "$PAT" "$TAG" "$SUF")
+  fi
+
+# else the branch is not "develop"
+# then make the MAJ part zero
+# and the TAG part the branch name
+# to avoid colliding with real rc or final versions
+else
+  if [[ "${SEMVER}" == "${MAJ}.${MIN}.${PAT}" ]] ; then
+    MAJ=0
+    SLM_VERSION=$(printf "%d.%d.%d" "$MAJ" "$MIN" "$PAT")
+  else
+    MAJ=0
+    TAG=${BRANCH}
+    SLM_VERSION=$(printf "%d.%d.%d-%s.%d" "$MAJ" "$MIN" "$PAT" "$TAG" "$SUF")
+  fi
+fi
+
+echo ${SLM_VERSION}