patman: Add a function to find a tool on the path
The Run() function automatically uses the PATH variable to locate a tool
when running it. Add a function that does this manually, so we don't have
to run a tool to find out if it is present.
This is needed by the new Bintool class, which wants to check which tools
are present.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/tools.py b/tools/patman/tools.py
index 24e2bf5..a27db05 100644
--- a/tools/patman/tools.py
+++ b/tools/patman/tools.py
@@ -378,6 +378,29 @@
raise ValueError(msg)
raise
+def tool_find(name):
+ """Search the current path for a tool
+
+ This uses both PATH and any value from SetToolPaths() to search for a tool
+
+ Args:
+ name (str): Name of tool to locate
+
+ Returns:
+ str: Full path to tool if found, else None
+ """
+ name = os.path.expanduser(name) # Expand paths containing ~
+ paths = []
+ pathvar = os.environ.get('PATH')
+ if pathvar:
+ paths = pathvar.split(':')
+ if tool_search_paths:
+ paths += tool_search_paths
+ for path in paths:
+ fname = os.path.join(path, name)
+ if os.path.isfile(fname) and os.access(fname, os.X_OK):
+ return fname
+
def Run(name, *args, **kwargs):
"""Run a tool with some arguments