I'm trying to remove a list of msgids from a .pot file. Is there some commandline tool which is capable of doing something like
msgdelete "foo*" bar.pot
I've found a workaround but it feels very dirty. Here I want to remove all msgids which consist of a single number or char:
msggrep -Ke '^[0-9a-z]$' project.pot > remove.po
msgcomm -u project.pot remove.po -o project.pot
rm remove.po
Related
I need help to rename multiple files in a directory based on the delimeter.
Sample:
From
R01235-XYZ-TRAIL.PDF
TO
R01234-TRAIL.PDF
and
From
XYZ-C12345-TRAIL.PDF
TO
C12345-TRAIL.PDF
is it possible to delete based on - delimeter?
I am not specifically removing XYZ but rather remove anything before the first - and the middle occurence between two -.. XYZ is just a representation of the characters in that field.
Thanks!
I tried SED, LS, MV, I also tried RENAME but it seems not working for me.
This might work for you:
rename -n 's/XYZ-//' file
This removes XYZ- from the file name.
If this meets your requirements, remove the -n option for the renaming to take place.
On retrospect, perhaps:
rename -n 's/([A-Z][0-9]{5}-).*-/$1/;s/^.*-([A-Z][0-9]{5}-)/$1/' file
With sed:
sed -E 's/^([A-Z][0-9]{5}-).*-|^.*([A-Z][0-9]{5}-.*)/mv & \1\2/' file
Check the results and then:
sed -E 's/^([A-Z][0-9]{5}-).*-|^.*([A-Z][0-9]{5}-.*)/mv & \1\2/' file | sh
I'm currently trying to use exiftool on Windows command prompt to read meta data from multiple files, then output to a single text file.
The exact command I last tried looked like this:
exiftool.exe -FileName -GPSPosition -CreateDate -d "%m:%d:%Y %H:%M:%S" -c "%d° %d' %.2f"\" -charset UTF-8 -ext jpg -w _Coordinate_Date.txt S:\Nick\Test\
When I run this, I get 7 individual text files with the content for one corresponding file in each of them. However, I simply want to output all of it to one single text file. Any help is greatly appreciated
The -w (textout) option can only be used to write multiple files. It is not meant to be used to output to a single file. As per the docs on -w:
It is not possible to specify a simple filename as an argument -- creating a single output file from multiple source files is typically done by shell redirection
Which is what you're doing with the >> ./output.txt part of your command. The -w _Coordinate_Date.txt isn't doing anything and I would think throw an Invalid TAG name: "w _Coordinate_Date.txt" error if quoted together like that as it gets treated as a single arugment. The -w option requires two arguments, the -w and either an extension or a format string.
I actually figured it out, if you wrap the entire -w _Coordinate_Date.txt command in quotations and append it to a file, you can throw all of the output into one text file.
i.e. "-w _Coordinate_Date.txt >> ./output.txt"
I am trying to move a file from Downloads to a folder on my desktop.
I keep getting this:
Why does the usage message appear afterwards?
It looks like your file has a space in it, so it needs to be escaped. Otherwise, mv tries to find a file named "Tres", one named "Beijos_C.pdf" and move them into that directory.
# Either...
mv Tres\ Beijos_C.pdf ~/Desktop/choro/
# ...or...
mv "Tres Beijos_C.pdf" ~/Desktop/choro/
If your file name contains spaces, you should surround it with " like this:
mv "my file name.txt" /home/user/Desktop
I'm trying to do use the sed command in a shell script where I want to remove lines that read STARTremoveThisComment and lines that read removeThisCommentEND.
I'm able to do it when I copy it to a new file using
sed 's/STARTremoveThisComment//' > test
But how do I do this by using the same file as input and output?
sed -i (or the extended version, --in-place) will automate the process normally done with less advanced implementations, that of sending output to temporary file, then renaming that back to the original.
The -i is for in-place editing, and you can also provide a backup suffix for keeping a copy of the original:
sed -i.bak fileToChange
sed --in-place=.bak fileToChange
Both of those will keep the original file in fileToChange.bak.
Keep in mind that in-place editing may not be available in all sed implementations but it is in GNU sed which should be available on all variants of Linux, as per your tags.
If you're using a more primitive implementation, you can use something like:
cp oldfile oldfile.bak && sed 'whatever' oldfile >newfile && mv newfile oldfile
You can use the flag -i for in-place editing and the -e for specifying normal script expression:
sed -i -e 's/pattern_to_search/text_to_replace/' file.txt
To delete lines that match a certain pattern you can use the simpler syntax. Notice the d flag:
sed -i '/pattern_to_search/d' file.txt
You really should not use sed for that. This question seems to come up ridiculously often, and it seems very strange that it does since the general solution is so trivial. It seems bizarre that people want to know how to do it in sed, and in python, and in ruby, etc. If you want to have a filter operate on an input and overwrite it, use the following simple script:
#!/bin/sh -e
in=${1?No input file specified}
mv $in ${bak=.$in.bak}
shift
"$#" < $bak > $in
Put that in your path in an executable file name inline, and then the problem is solved in general. For example:
inline input-file sed -e s/foo/bar/g
Now, if you want to add logic to keep multiple backups, or if you have some options to change the backup naming scheme, or whatever, you fix it in one place. What's the command line option to get 1-up counters on the backup file when processing a file in-place with perl? What about with ruby? Is the option different for gnu-sed? How does awk handle it? The whole friggin' point of unix is that tools do one thing only. Handling logic for backup files is a second thing, and needs to be factored out. If you are implementing a tool, do not add logic to create backup files. Tell your users to use a 2nd tool for that. Integration is bad. Modularity is good. That is the unix way.
Notice that this script has several problems. The permissions/mode of the input file may be changed, for example. I'm sure there are innumerable other issues. However, by putting the backup logic in a wrapper script, you localize all of these issues and don't have to worry that sed overwrites the files and changes mode, while python keeps the file in place and does not change the inode (I made up those two cases, the point being that not all tools will use the same logic, while the wrapper script will.)
As far as I know it is not possible to use the same file for input and output. Though one solution is make a shell script which will save it to another file, delete the old input and rename the output to the input file name.
sed -e s/try/this/g input.file > output.file;mv output.file input.file
I suggest using sponge
sponge reads standard input and writes it out to the specified file.
Unlike a shell redirect, sponge soaks up all its input before writing
the output file. This allows constructing pipelines that read from and
write to the same file.
cat test | sed 's/STARTremoveThisComment//' | sponge test
I have a bunch of text files which have both strings and numbers in it, but the string are just in the first few rows.
I'm trying to write a script which go in to my folder search all the file in the folder and delete the text from the files and write the rest as it is in the new text file.
Does anybody know how?
I don't think this is a good use of MATLAB.
I think you'd be better off scripting this in Python or shell. Here is one way you could do it with tr in shell if you're on *nix or mac and if your files are all in the same directory and all have the file extension .txt:
#!/bin/sh
for i in `ls *.txt`
do
cat $i | tr -d "[:alpha:]" > $i.tr.txt
done
To run. save the code above as a file, make it executable (chmod a+x filename), and run it in the directory with your text files.
If the number of string lines is always the same, you can use textread() with 'headerlines' option to skip over those string lines, then write the entire text buffer out.