[PATCH v2 1/2] git-p4: minor optimization in read_pip_lines

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From: Daniel Sonbolian <dsal3389@xxxxxxxxx>

checking for an error condition before reading and/or decoding
lines from the pip stream to avoid unnecessary computation

Signed-off-by: Daniel Sonbolian <dsal3389@xxxxxxxxx>
---
 git-p4.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/git-p4.py b/git-p4.py
index d26a980e5ac..097272a5543 100755
--- a/git-p4.py
+++ b/git-p4.py
@@ -399,11 +399,15 @@ def read_pipe_lines(c, raw=False, *k, **kw):
 
     p = subprocess.Popen(c, stdout=subprocess.PIPE, *k, **kw)
     pipe = p.stdout
+
+    if p.wait():
+        die('Command failed: {}'.format(' '.join(c)))
+
     lines = pipe.readlines()
+    pipe.close()
+
     if not raw:
-        lines = [decode_text_stream(line) for line in lines]
-    if pipe.close() or p.wait():
-        die('Command failed: {}'.format(' '.join(c)))
+        return [decode_text_stream(line) for line in lines]
     return lines
 
 
-- 
gitgitgadget




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