Changes between Initial Version and Version 1 of MaintenanceGuidelinesTips

Timestamp:

09/10/10 13:46:14 (15 years ago)

Author:

Fran Boon

Comment:

--

MaintenanceGuidelinesTips

@@ +1 @@
+== Sed: Stream Editor ==
+Search/Replace:
+{{{
+sed 's/old/new/g' input.txt > output.txt
+}}}
+Faster:
+{{{
+sed '/old/ s/old/new/g' input.txt > output.txt
+}}}
+
+Do on a folder full of files:
+{{{
+#! /bin/sh
+# Source files are saved as "filename.txt.bak" in case of error
+# The '&&' after cp is an additional safety feature
+for file in *.txt
+do
+cp $file $file.bak &&
+sed 's/foo/bar/g' $file.bak >$file
+done
+}}}
+
+Insert paragraph:
+ * e.g. search for lines `#include <termios.h>' and then write:
+{{{
+#ifdef SYSV
+#include <termios.h>
+#else
+#include <sgtty.h>
+#endif
+}}}
+
+Now, for writing the same script on one line, the -e mechanism is needed... what follows each -e can be considered as an input line from a sed script file, so nothing kept us from doing:
+{{{
+sed -e '/#include <termios\.h>/{' \
+-e 'i\' \
+-e '#ifdef SYSV' \
+-e 'a\' \
+-e '#else\' \
+-e '#include <sgtty.h>\' \
+-e '#endif' \
+-e '}'
+}}}
+
+1-liners:
+ * http://www.student.northpark.edu/pemente/sed/sed1line.txt
+
+Tutorial:
+ * http://sed.sourceforge.net/grabbag/tutorials/do_it_with_sed.txt
+
+Collected resources:
+ * http://sed.sf.net/
+
+----
+MaintenanceGuidelines