I am trying to modify Brett Terpstra's handy QuickQuestion script for my Linux machine. What would be Ack's equivalent to the following mdfind commands:
mdfind -onlyin "$NOTESDIR" "filename:.$NOTESEXT AND filename:\"$NOTESPRE\" AND ${INPUT%\?}"
...
echo "`mdfind -onlyin \"$NOTESDIR\" -interpret \"filename:.$NOTESEXT AND filename:$NOTESPRE AND ${INPUT%\?}\"`"
I can't seem to get the AND part right. I understand that one has to use parentheses since Ack is Perl. But for example (?="$NOTESPRE")(?="$INPUT") gave errors.
Furthermore, I am not sure what to do with the -interpret switch on the second line.
Puzzled with such a simple query... Thanks for any help!
Double lookaheads need a range of things to consider, so you need to add wildcards to their patterns, for example:
>>echo "foo bar \$NOTESPRE \$INPUT baz" | ack "^(?=.*$NOTESPRE)(?=.*$INPUT).*$"
returns:
foo bar $NOTESPRE $INPUT baz
If you need to search a particular directory for files containing this line, just specify the directory on the command line:
ack "^(?=.*$NOTESPRE)(?=.*$INPUT).*$" path\to\directoryToSearch
-interpret has no direct parallel in regex.
Related
I am trying to build a connection string that requires pulling 3 IP addresses from another config file. When I get those values, I need to replace the port on each. I plan to replace each port using simple Bash find and replace ${string/pattern/replacement} but my problem is I'm stuck on the best way to parse the pattern out of the IP.
Here is what I have so far:
myFile.config:
ip.1=ip-ip-1-address:1234:5678
ip.2=ip-ip-2-address:1234:5678
ip.3=ip-ip-3-address:1234:5678
Copying some other simple process, I found I can pull the value of each IP like this:
IP1=`grep "ip.1=" /path/to/conf/myFile.config | awk -F "=" '{print $2}'`
which gives me ip.1=ip-ip-1-address:1234:5678. However, I need to replace 1234:5678 with 6543 for example. I've been looking around and I found this awesome answer that detailed using Bash prefix substitution but that relies on knowing the parameter. for example, I would have to do it this way:
test=${ip1##ip-ip-1-address:}
which results in $test being 1234:5678. That's fine but maybe I don't know the IP address as the parameter, so I'm back to considering regex unless there's a way for me to use * as the parameter or something, but I have been unsuccessful so far. For regex, I have tried a bunch such as test=${ip1/(?<=:).*/}.
Note that ${ip1/(?<=:).*/} you tried is an example of string manipulation syntax that does not support regex, only specific patterns.
You seem to want
x='ip.1=ip-ip-1-address:1234:5678'
echo "${x%%:*}:6543" # => ip.1=ip-ip-1-address:6543
The ${x%%:*} takes the value of x and removes all chars from the end till the first : including it. :6543 is added to the result of this manipulation using "${x%%:*}:6543".
To extract that value, you may also use
awk '/^ip\.1=/{sub("^[^:]+:", "");print}' myFile.config
The awk command finds lines starting with ip.1= and then removes all text from the start till the first colon including the colon and only prints these values.
I have some markdown files with broken relative links. I wish to fix them.
For instance I have this (very short) example file:
Please refer to [this first ressource](wrong/path/to/file) and [this other ressource](non/existing/text).
You can also search on [this website](https://example.net).
Note that there can be multiple links on the same line, and that there are also external links, which should stay untouched.
On a first approach, if we forget about external links, and if the correct resources pointed by the relative links were only placed in a sub-folder, we could have this approach:
sed -i -E "s/(\[.*\])\(([^\)]*)\)/\1(subfolder\/\2)/g" document.md
which would turn my example document into this:
Please refer to [this first ressource](subfolder/wrong/path/to/file) and [this other ressource](subfolder/non/existing/text).
You can also search on [this website](subfolder/https://example.net).
But we have 2 problems here:
External links are messed up
Correct resources pointed by the links are not simply in some sub-folders. The correct path can be determined from the wrong one though, but we have to go through the entire folder in order to do that. This could be done quite easily in a bash script for instance.
So I need a way to apply a function to my capture group before sed takes it to determine the replacement string. Here, the capture flag I need to process is \2.
Any solution even without sed is acceptable.
Thanks.
Concerning your second bullet point,
Correct resources pointed by the links are not simply in some sub-folders. The correct path can be determined from the wrong one though, but we have to go through the entire folder in order to do that. This could be done quite easily in a bash script for instance.
you have not mentioned what this bash script should do. In the following I assume you have defined a correct_path function which does the job:
correct_path () { echo ${1//#(wrong|non\/existing)/correct}; } # this example assumes shopt -s extglob
With that function defined, you can run the following command, which
executes a sed command to change each address to $(correct_path address) and ecloses the result in double quotes to preserve the newlines, "$(…)";
evals the line made up of echo, ", the "$(…)" generated above, and another ".
eval echo '"'"$(< os sed -E 's/(\[[^]]*\])\(([^)]*)\)/\1($(correct_path \2))/g')"'"' > os
However eval is evil.
I have a few Regex expressions that I use with xVim for Xcode. Rather than repeatedly typing them out in the command bar with \<Regex>, I'd like to be able to invoke them with a custom command, like :Regex1. So I've added command Regex1 “/-\s*\(“ to my xvimrc file and restarted Xcode. When I run :Regex1 however nothing happens.
Your command wouldn't even work in original Vim. I don't know xVim, but try something along these lines:
" With cursor moving to match.
command Foo /foo/
" Just updating the search pattern (but less likely to be portable to xVim).
command Foo let #/ = 'foo'
If none of that works; try defining a mapping instead. As this is just translating keys, it has the highest chance of being supported.
I would suggest using this PERL Regex plugin since it already does what you want.
https://github.com/othree/eregex.vim
Abbreviations ...
I understand you often use the same regex. You can use abreviations instead of a command to do a search.
ab re -\s*(
then type / + re + space and your long regex (here just "-\s*(" should expand).
... Not user defined command
User defined commands are not available in ed nor in vi nor in vim without the +eval compilation flag (:h user-commands and scroll one line up).
For a list of ex commands: http://www.csb.yale.edu/userguides/wordprocess/vi-summary.html
For a list of ed commands: http://pubs.opengroup.org/onlinepubs/7908799/xcu/ed.html
EDIT: I am using Cygwin. I am unsure whether this is of relevance and it was a detail I missed during writing this question.
EDIT2: Have tried replacing the "TAB" char people pointed out with the RegEx \s which covers spacing chars (spaces and tabs primarily) and this did not affect the expression at all, meaning that it is not the tabs causing the issue, especially since the expression runs once without errors anyway.
So far this script has been causing me a ton of trouble.
I DID have an issue before but I resolved that while I was writing a question here (lucky imo) but this one I've been stuck on for at least an hour now and I've tried varying solutions, none of which actually work or told me something I didn't already try.
I have a rather cool seeming FTP log fetcher script and part of this script replaces the 600MB of errors in this logfile to nothing, essentially removing them. Unfortunately this script also gets rid of parts of other errors too, so I've had to edit it. This is where I'm getting stuck.
Through base research I managed to find out that sed could do what I want, and through three hours of playing so far it does most of what I tell it to, minus one thing. One, and ONLY one, of the sed statements I have built only replaces the first instance of the string I've given it despite having the g modifier attached to the end.
I am working with a test script right now as to avoid potential permanent damage to my original FTP script, and the test script copies over an example file with a few of the errors I need replacing.
Walkthrough of the scripts INTENDED behaviour before showing:
1. Sets a prefix which happens on ALL lines in the file, pretty important part of the script.
2. Copies the example file to a file named test2.log
3. Replace all instances of the UNIX newline char \n with [loll] (first thing that came to my mind)
4. Remove all instances of battle error type 1 and 2.
5. Return all [loll] strings with the UNIX \n for newlines, therefore returning the logfile to its original state minus the errors.
Script:
#DTP="\[([0-9]+-[0-9]+-[0-9]+-[0-9]+|latest)\.log\] \[[0-9]+:[0-9]+:[0-9]+\] \[Server thread/(INFO|WARN)\]: "
echo "${DTP}"
DTP1="\[[0-9]*:[0-9]*:[0-9]*\]\s\[Server\sThread\/\(WARN\|INFO\)\]:\s"
DTP="\[loll\]\[[0-9]*:[0-9]*:[0-9]*\]\s\[Server\sThread\/\(WARN\|INFO\)\]:\s"
echo "${DTP}"
echo "1"
cp test.log test2.log
#cat test.log >test2.log
sed -i ':a;N;$!ba;s/\n/\[loll\]/g' test2.log #| egrep -i "" >test2.log
sed -i 's/'${DTP1}'Caught error in battle. Continuing...'${DTP}'java.lang.NullPointerException'${DTP}' at com.pixelmonmod.pixelmon.battles.controller.participants.PixelmonWrapper.useAttack(PixelmonWrapper.java:173)'${DTP}' at com.pixelmonmod.pixelmon.battles.controller.participants.PixelmonWrapper.takeTurn(PixelmonWrapper.java:330)'${DTP}' at com.pixelmonmod.pixelmon.battles.controller.BattleControllerBase.takeTurn(BattleControllerBase.java:276)'${DTP}' at com.pixelmonmod.pixelmon.battles.controller.BattleControllerBase.update(BattleControllerBase.java:157)'${DTP}' at com.pixelmonmod.pixelmon.battles.BattleRegistry.updateBattles(BattleRegistry.java:63)'${DTP}' at com.pixelmonmod.pixelmon.battles.BattleTickHandler.tickStart(BattleTickHandler.java:12)'${DTP}' at cpw.mods.fml.common.eventhandler.ASMEventHandler_20_BattleTickHandler_tickStart_WorldTickEvent.invoke(.dynamic)'${DTP}' at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:51)'${DTP}' at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:122)'${DTP}' at cpw.mods.fml.common.FMLCommonHandler.onPostWorldTick(FMLCommonHandler.java:255)'${DTP}' at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:929)'${DTP}' at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:429)'${DTP}' at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:776)'${DTP}' at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:639)'${DTP}' at java.lang.Thread.run(Thread.java:745)//gI' test2.log
echo "2"
sed -i 's/'${DTP1}'Caught error in battle. Continuing...'${DTP}'java.lang.NullPointerException\[loll\]//gI' test2.log
echo "3"
sed -i 's/\[loll\]/\n/g' test2.log
I've set them to also run case insensitive checks on the provided strings as sometimes I write with all lower case, however for most of this I copied and pasted it directly.
Sample input:
http://pastebin.com/3KPB33X2
Outputs:
Expected:
meow
Test message
WOOF MEOWLOL
Actual: http://pastebin.com/pnvDwkxz
It's been killing my mind for a while now because I had this issue even before the other one, except I barely noticed it. I can't find any predictable behaviour in the script, and as far as I am aware it SHOULD be working perfectly fine and giving me the output I expect.
Any help would be appreciated, because as soon as I can get this bug sorted out I'll be able to enter in the rest of the script and replace this with the existing battle-error replacement script in my log-fetcher.
Knowing me it's something small and stupid but I've tried literally everything I came across, including adding the :a;N;$!ba; to the start of the bit which isn't working properly (and realising that failed horribly).
Thanks.
~BAI1
Are you looking for something like this:
sed -n ':a;s/\[.*Server thread\/\(INFO\|WARN\).*//i;/^$/!p;n;b a' battle.log
I want to apply a certain regular expression substitution globally to about 40 Javascript files in and under a directory. I'm a vim user, but doing this by hand can be tedious and error-prone, so I'd like to automate it with a script.
I tried sed, but handling more than one line at a time is awkward, especially if there is no limit to how many lines the pattern might match.
I also tried this script (on a single file, for testing):
ex $1 <<EOF
gs/,\(\_\s*[\]})]\)/\1/
EOF
The pattern will eliminate a trailing comma in any Perl/Ruby-style list, so that "[a, b, c,]" will come out as "[a, b, c]" in order to satisfy Internet Explorer, which alone among browsers, chokes on such lists.
The pattern works beautifully in vim but does nothing if I run it in ex, as per the above script.
Can anyone see what I might be missing?
You asked for a script, but you mentioned that you are vim user. I tend to do project-wide find and replace inside of vim, like so:
:args **/*.js | argdo %s/,\(\_\s*[\]})]\)/\1/ge | update
This is very similar to the :bufdo solution mentioned by another commenter, but it will use your args list rather than your buflist (and thus doesn't require a brand new vim session nor for you to be careful about closing buffers you don't want touched).
:args **/*.js - sets your arglist to contain all .js files in this directory and subdirectories
| - pipe is vim's command separator, letting us have multiple commands on one line
:argdo - run the following command(s) on all arguments. it will "swallow" subsequent pipes
% - a range representing the whole file
:s - substitute command, which you already know about
:s_flags, ge - global (substitute as many times per line as possible) and suppress errors (i.e. "No match")
| - this pipe is "swallowed" by the :argdo, so the following command also operates once per argument
:update - like :write but only when the buffer has been modified
This pattern will obviously work for any vim command which you want to run on multiple files, so it's a handy one to keep in mind. For example, I like to use it to remove trailing whitespace (%s/\s\+$//), set uniform line-endings (set ff=unix) or file encoding (set filencoding=utf8), and retab my files.
1) Open all the files with vim:
bash$ vim $(find . -name '*.js')
2) Apply substitute command to all files:
:bufdo %s/,\(\_\s*[\]})]\)/\1/ge
3) Save all the files and quit:
:wall
:q
I think you'll need to recheck your search pattern, it doesn't look right. I think where you have \_\s* you should have \_s* instead.
Edit: You should also use the /ge options for the :s... command (I've added these above).
You can automate the actions of both vi and ex by passing the argument +'command' from the command line, which enables them to be used as text filters.
In your situation, the following command should work fine:
find /path/to/dir -name '*.js' | xargs ex +'%s/,\(\_\s*[\]})]\)/\1/g' +'wq!'
you can use a combination of the find command and sed
find /path -type f -iname "*.js" -exec sed -i.bak 's/,[ \t]*]/]/' "{}" +;
If you are on windows, Notepad++ allows you to run simple regexes on all opened files.
Search for ,\s*\] and replace with ]
should work for the type of lists you describe.