[libvirt PATCH v4] ch: Fix cloud-hypervisor version processing

[Praveen K Paladugu <prapal@xxxxxxxxxxxxxxxxxxx>]

Refactor the version processing logic in ch driver to support versions
from non-release cloud-hypervisor binaries. This version also supports
versions with branch prefixes in them.

Signed-off-by: Praveen K Paladugu <prapal@xxxxxxxxxxxxxxxxxxx>
---
 src/ch/ch_conf.c | 34 ++++++++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/src/ch/ch_conf.c b/src/ch/ch_conf.c
index a8565d9537..f421af5121 100644
--- a/src/ch/ch_conf.c
+++ b/src/ch/ch_conf.c
@@ -172,6 +172,29 @@ virCHDriverConfigDispose(void *obj)
 
 #define MIN_VERSION ((15 * 1000000) + (0 * 1000) + (0))
 
+/**
+ * chPreProcessVersionString:
+ *
+ * Returns: a pointer to numerical version without branch/commit info
+ */
+static char *
+chPreProcessVersionString(char *version)
+{
+    char *tmp = strrchr(version, '/');
+
+    if (tmp)
+        version = tmp + 1;
+
+    if (version[0] == 'v')
+        version++;
+
+    tmp = strchr(version, '-');
+    if (tmp)
+        *tmp = '\0';
+
+    return version;
+}
+
 int
 chExtractVersion(virCHDriver *driver)
 {
@@ -193,13 +216,20 @@ chExtractVersion(virCHDriver *driver)
 
     tmp = help;
 
-    /* expected format: cloud-hypervisor v<major>.<minor>.<micro> */
-    if ((tmp = STRSKIP(tmp, "cloud-hypervisor v")) == NULL) {
+    /* Below are example version formats and expected outputs:
+     *  cloud-hypervisor v32.0.0 (expected: 32.0.0)
+     *  cloud-hypervisor v33.0-104-ge0e3779e-dirty (expected: 33.0)
+     *  cloud-hypervisor testing/v32.0.131-1-ga5d6db5c-dirty (expected: 32.0.131)
+     */
+    if ((tmp = STRSKIP(tmp, "cloud-hypervisor ")) == NULL) {
         virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                        _("Unexpected output of cloud-hypervisor binary"));
         return -1;
     }
 
+    tmp = chPreProcessVersionString(tmp);
+    VIR_DEBUG("Cloud-Hypervisor version detected: %s", tmp);
+
     if (virStringParseVersion(&version, tmp, true) < 0) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("Unable to parse cloud-hypervisor version: %1$s"), tmp);
-- 
2.41.0