logger: add git branch name to the log

Tools/px_update_git_header.py

@@ -17,6 +17,11 @@ git_tag = subprocess.check_output('git describe --always --tags'.split(),
                                   stderr=subprocess.STDOUT).decode('utf-8').strip()
 git_version = subprocess.check_output('git rev-parse --verify HEAD'.split(),
                                       stderr=subprocess.STDOUT).decode('utf-8').strip()
+try:
+    git_branch_name = subprocess.check_output('git symbolic-ref -q --short HEAD'.split(),
+                                          stderr=subprocess.STDOUT).decode('utf-8').strip()
+except:
+    git_branch_name = ''
 git_version_short = git_version[0:16]
 nuttx_git_tag = subprocess.check_output('git describe --always --tags'.split(),
                                   cwd='NuttX/nuttx', stderr=subprocess.STDOUT).decode('utf-8').strip().replace("nuttx-","v")
@@ -36,14 +41,18 @@ header = """
 #define PX4_GIT_VERSION_STR  "{git_version}"
 #define PX4_GIT_VERSION_BINARY 0x{git_version_short}
 #define PX4_GIT_TAG_STR  "{git_tag}"
+#define PX4_GIT_BRANCH_NAME  "{git_branch_name}"
+
 #define NUTTX_GIT_VERSION_STR  "{nuttx_git_version}"
 #define NUTTX_GIT_VERSION_BINARY 0x{nuttx_git_version_short}
 #define NUTTX_GIT_TAG_STR  "{nuttx_git_tag}"
+
 #define MAVLINK_LIB_GIT_VERSION_STR  "{mavlink_git_version}"
 #define MAVLINK_LIB_GIT_VERSION_BINARY 0x{mavlink_git_version_short}
 """.format(git_tag=git_tag,
            git_version=git_version,
            git_version_short=git_version_short,
+           git_branch_name=git_branch_name,
            nuttx_git_version=nuttx_git_version,
            nuttx_git_version_short=nuttx_git_version_short,
            nuttx_git_tag=nuttx_git_tag,