[PATCH] MINOR: cli: add -vq and -vql flags for concise version output

[nkurashkin]

From: Nikita Kurashkin <nkurash...@stsoft.ru>

This patch introduces two new CLI flags to display HAProxy version info in a 
cleaner way:

- `-vq` outputs a short, minimal version string (e.g., "3.3").
- `-vql` outputs the full version string with suffixes (e.g., 
"3.3-dev5-1bb975-71").

This addresses the need for easy parsing of version info in automation without 
breaking existing -v and -vv behaviors (see #2509).

In CLI argument parsing, handle `-vq` and `-vql` by calling 
`display_version_plain()`
with a flag indicating short or full output, then exit. This function prints 
only
the version number in a simplified format, omitting extra info shown by 
`display_version()`.

Signed-off-by: Nikita Kurashkin <nkurash...@stsoft.ru>
---
 src/haproxy.c | 35 +++++++++++++++++++++++++++++++----
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/src/haproxy.c b/src/haproxy.c
index e0f196a34..5a7ec705a 100644
--- a/src/haproxy.c
+++ b/src/haproxy.c
@@ -614,6 +614,23 @@ void display_version()
        }
 }
 
+void display_version_plain(int full_version)
+{
+    if (full_version) {
+        printf("%s\n", haproxy_version);
+    } else {
+        char base_version[20];
+        char *del;
+        for (del = haproxy_version; *del; del++) {
+            if (*del == '.') continue;
+            if (*del < '0' || *del > '9')
+                break;
+        }
+        strlcpy2(base_version, haproxy_version, del - haproxy_version + 1);
+        printf("%s\n", base_version);
+    }
+}
+
 static void display_build_opts()
 {
        const char **opt;
@@ -1472,10 +1489,20 @@ static void init_args(int argc, char **argv)
 
                        /* 1 arg */
                        if (*flag == 'v') {
-                               display_version();
-                               if (flag[1] == 'v')  /* -vv */
-                                       display_build_opts();
-                               deinit_and_exit(0);
+                               if (flag[1] == 'q' && flag[2] == '\0') {  /* 
-vq */
+                                       display_version_plain(0);
+                                       deinit_and_exit(0);
+                               }
+                               else if (flag[1] == 'q' && flag[2] == 'l' && 
flag[3] == '\0') {  /* -vql */
+                                       display_version_plain(1);
+                                       deinit_and_exit(0);
+                               }
+                               else {
+                                       display_version();
+                                       if (flag[1] == 'v')  /* -vv */
+                                               display_build_opts();
+                                       deinit_and_exit(0);
+                               }
                        }
 #if defined(USE_EPOLL)
                        else if (*flag == 'd' && flag[1] == 'e')
-- 
2.34.1