build: use git version info instead of svn

Migrate from svn to git.  Since our build system automatically generates
version info from the svn repo, this needs to change when we move the
repo to git.

1 files changed, 67 insertions, 0 deletions

diff --git a/scripts/repo-info.sh b/scripts/repo-info.sh
new file mode 100755
index 000000000..72d974d04
--- /dev/null
+++ b/scripts/repo-info.sh
@@ -0,0 +1,67 @@
+#! /bin/bash
+#
+# Retrieves git repository info for directory ${1} using command ${2}
+
+# Args
+REPO_DIR='.'
+if [[ ${1} ]]; then
+    REPO_DIR=${1}
+fi
+GIT_EXE='git'
+if [[ ${2} ]]; then
+    GIT_EXE=${2}
+fi
+
+# Switch to working directory
+if ! cd ${REPO_DIR} 2>/dev/null; then
+    echo "Invalid directory ${REPO_DIR}." 1>&2
+    exit 1
+fi
+
+# Check whether we have git
+if ! hash ${GIT_EXE} 2>/dev/null; then
+    echo "Command '${GIT_EXE}' not found." 1>&2
+    exit 1
+fi
+
+# Check if there is a valid git repo here
+HASH=$(${GIT_EXE} rev-parse HEAD)
+ERR=$?
+if [[ ${ERR} -ne 0 ]]; then
+    echo "Not a valid repository." 1>&2
+    exit ${ERR}
+elif [[ -z ${HASH} ]]; then
+    echo "Not a valid repository." 1>&2
+    exit 1
+fi
+
+# Retrieve info
+URL=$(${GIT_EXE} config remote.origin.url)
+TAG=$(${GIT_EXE} describe --abbrev=0)
+if [[ ${TAG} ]]; then
+    REV=$(${GIT_EXE} rev-list ${TAG}.. --count)
+else
+    TAG=$(${GIT_EXE} describe $(${GIT_EXE} rev-list --tags --max-count=1))
+    if [[ ${TAG} ]]; then
+        REV=$(${GIT_EXE} rev-list $(${GIT_EXE} merge-base 0.10.2 HEAD).. --count)
+    else
+        REV=$(${GIT_EXE} rev-list HEAD --count)
+    fi
+fi
+BRANCH=$(${GIT_EXE} symbolic-ref -q --short HEAD)
+REMOTE="${URL}"
+UPSTREAM=$(${GIT_EXE} config branch.${BRANCH}.remote)
+if [[ ${UPSTREAM} ]]; then
+    REMOTE="${UPSTREAM}"
+fi
+DATE=$(${GIT_EXE} log -1 --format="format:%ai")
+
+# Output
+# Only write tag and rev if they exist. A fresh clone currently has no tags.
+echo "URL=${URL}"
+echo "HASH=${HASH}"
+if [[ ${TAG} ]]; then echo "TAG=${TAG}"; fi
+if [[ ${REV} ]]; then echo "REV=${REV}"; fi
+echo "BRANCH=${BRANCH}"
+echo "REMOTE=${REMOTE}"
+echo "DATE=${DATE}"