the trick
command: p4 changes -u myusername | head -100 | awk '{print $2}' | p4 -x- describepurpose
Perforce on the unix command line to search through last 100 changes you madeplatform
any command line perforce with gnu tools availableintroduction
Every once in a while someone asks me what i did to some code a month ago. Okay maybe it's more like 'what did you screw up 10 minutes ago?!?!' If you're anything like me - once you commit your changes you forget all about the task and move on (note to self eclipse mylyn is a great enabler of this attitude)The easy answer to the question 'what did you do to this code somewhere in the recent past' is to check the perforce history for your checkins. Pipe this to your trusty GNU tools and you can easily weed out all the crap and find exactly what you're looking for.
So lets say I remember my bug had something to do with the Person.java class. I want to review that changeset and make further modifications to some of the files.. i just don't remember what the changes were or what files were affected.
the command
step 1 - list changes
the following command gives you a printout of all the changes submitted to your perforce servercommand: p4 changes
step 2 - list your changes only
You really just want to see your changescommand: p4 changes -u myusername
this gives you several rows of information that look like this
output:
Change 9991 on '2010/01/01' by myusername@myclientname 'FIX horrible bug i am unsung hero'
Change 9995 on '2010/01/02' by myusername@myclientname 'oops fix 9991 again because i was drunk yesterday'
step 3 - extract only the changeset id from the output
We'll pull out just the changeset id so that we can investigate those changesets furthercommand: p4 changes -u myusername | awk '{ print $2 }'
output:
9991
9995
step 4 - dig deeper into those changeset
take our list of changesets and ask perforce to describe each of those in detailcommand: p4 changes -u myusername | awk '{ print $2 }' | p4 -x- describe
the final 'p4 -x- describe' means 'take stdin and perform the p4 command on it'
'cat blah.txt | p4 -x- describe' is equivalent to 'cat blah.txt | xargs -I {} p4 describe {}'
if that helps
the output of this command can be quite large. it contains the the files you have changed and the diffs of each changed file.
step 5 - use our favorite editor to search through the changes
Now you have an output stream that you can use with grep or less or whatever to find filenames and lines of code. Remember that i was looking for a change that had something to do with Person.javacommand: p4 changes -u myusername | awk '{ print $2 }' | p4 -x- describe | grep -n Person.java
or my favorite
command: p4 changes -u myusername | awk '{ print $2 }' | p4 -x- describe | less
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