New misc scripts, header_usage.sh and author_line_count.sh.

webrtc/tools/author_line_count

Index: webrtc/tools/author_line_count
diff --git a/webrtc/tools/author_line_count b/webrtc/tools/author_line_count
new file mode 100755
index 0000000000000000000000000000000000000000..446cf4c4b99f11d9eeae9f49f8289f8afdb21743
--- /dev/null
+++ b/webrtc/tools/author_line_count
@@ -0,0 +1,15 @@
+#! /bin/sh

[kjellander_webrtc, 2016/06/13 12:49:52]

Provide a brief description.

[kjellander_webrtc, 2016/06/13 12:49:52]

Change to #!/bin/bash

[nisse-webrtc, 2016/06/14 09:38:47]

Done.

[kjellander_webrtc, 2016/06/14 14:11:12]

Not done :) Still needs to remove the space.

[nisse-webrtc, 2016/06/15 06:55:23]

Ok. That's unorthodox, script files are traditionally assumed to use the 32-bit
magic number "#! /".

+
+AUTHOR=$1
+if [ -z "$AUTHOR" ] ; then

[kjellander_webrtc, 2016/06/13 12:49:51]

Prefer brace-quoting of multiple-character variables:
https://engdoc.corp.google.com/eng/doc/shell.xml?showone=Variable_expansion&c...

[kjellander_webrtc, 2016/06/13 12:49:52]

Use [[ ]] style test.
https://engdoc.corp.google.com/eng/doc/shell.xml?cl=head#Test,_%5B_and_%5B%5B

[nisse-webrtc, 2016/06/14 09:38:46]

Done.

+  echo "Usage: $0 AUTHOR-PATTERN"
+  exit 1
+fi
+
+git log --author="$AUTHOR" --oneline --shortstat | grep '^ ' | gawk '
+BEGIN { RS=",|\n" }
+/insertion/ { total += $1 }
+/deletion/ { total -= $1 }
+END { print total }
+'
+