I am trying to create a bash script that loops trough a folder and prints all images.
However the line that should print the image actually doesn't print the image it self, it just prints the text.
```{bash echo=FALSE, comment=""}
echo "";
```
Example output:
[dog][images/dog.jpg]
What i want is the actual image of the dog:
Add results="asis" to your document.
```{bash echo=FALSE, comment="", results="asis"}
echo "";
```
See more at https://bookdown.org/yihui/rmarkdown-cookbook/results-asis.html
(BTW, on my rendering, without results="asis", I see
In your output the bang ! is missing.)
Related
I'm creating a README file using Bash. When adding description in the file, I want the text to appear as 2 paragraphs. How can I create a line break after para one? I tried "\n" but nothing happened.
Continuing from my comments. What you want to be able to write formatted blocks of text out to a file (or to the terminal /dev/stdout) is a heredoc. A heredoc will write the lines out as formatted between and opening and closing tag. (EOF is traditionally used, but it can be anything you like). The form is:
cat << EOF
Your text goes here
and here
and here, etc...
EOF
If you want to write to a file, then use cat >filename << EOF as the opening. If you have variables in your text that you do not want expanded (e.g. $myvar you want written out as $myvar and not what it holds), quote the opening tag, e.g. 'EOF')
In your case if you want to write to a filename from within your script, then just use the form above. You can use default initialization to write to the terminal if no filename is given as an argument to your script, e.g.
#!/bin/bash
fname="${1:-/dev/stdout}" # set filename to write to (stdout by default)
# heredoc
cat >"$fname" << EOF
My dog has fleas and my cat has none. Lucky cat. My snake has
scales and can't have fleas. Lucky snake.
If the animals weren't animals could they still have fleas?
EOF
If called with no argument, the heredoc is printed to the terminal (/dev/stdout). If given a filename, then the heredoc output is redirected to the filename, e.g.
$ bash write-heredoc.sh README
Fills the README file with the heredoc contents, e.g.
$ cat README
My dog has fleas and my cat has none. Lucky cat. My snake has
scales and can't have fleas. Lucky snake.
If the animals weren't animals could they still have fleas?
You can include blank lines as you like. If you want to append to your README file using multiple heredocs, then just use cat >>filename << EOF to append instead of truncate.
I would want to copy a text to the clipboard using batch script so I don't have to open a text file to select all text and copy. I tried this code:
echo | set /p= hello & echo.world |clip
Output
world
Expected clip (desired)
hello
world
but it only clipped:
world
What are options so I can copy and paste multiple line text or paragraph using batch file?
Thanks!
Like Nico wrote, if you have several lines of text, then you’ll need to wrap them in brackets () like this:
echo off | clip
(
echo This is line one
echo This is line two
echo this is line three
)| clip
More information about it you can find here.
I have about 600 books in PDF format where the filename is in the format:
AuthorForename AuthorSurname - Title (Date).pdf
For example:
Foo Z. Bar - Writing Scripts for Idiots (2017)
Bar Foo - Fun with PDFs (2016)
The metadata is unfortunately missing for pretty much all of them so when I import them into Calibre the Author field is blank.
I'm trying to write a script that will take everything that appears before the '-', removes the trailing space, and then adds it as the author in the PDF metadata using exiftool.
So far I have the following:
for i in "*.pdf";
do exiftool -author=$(echo $i | sed 's/-.*//' | sed 's/[ \t]*$//') "$i";
done
When trying to run it, however, the following is returned:
Error: File not found - Z.
Error: File not found - Bar
Error: File not found - *.pdf
0 image files updated
3 files weren't updated due to errors
What about the -author= phrase is breaking here? Please could someone enlighten me?
You don't need to script this. In fact, doing so will be much slower than letting exiftool do it by itself as you would require exiftool to startup once for every file.
Try this
exiftool -ext pdf '-author<${filename;s/\s+-.*//}' /path/to/target/directory
Breakdown:
-ext pdf process only PDF files
-author the tag to copy to
< The copy from another tag option. In this case, the filename will be treated as a pseudo-tag
${filename;s/\s+-.*//} Copying from the filename, but first performing a regex on it. In this case, looking for 1 or more spaces, a dash, and the rest of the name and removing it.
Add -r if you want to recurse into subdirectories. Add -overwrite_original to avoid making backupfiles with _original added to the filename.
The error with your first command was that the value you wanted to assign had spaces in it and needed to be enclosed by quotes.
I have a bash script that runs and outputs to a text file however the colour codes it uses are also included what i'd like to know is how to remove them from the file, ie
^[[38;1;32mHello^[[39m
^[[38;1;31mUser^[[39m
so I just want to be left with Hello and User, so something like sed -r "special characters" from file A save to file B
sed 's/\^\[\[[^m]*m//g'
remove (all) part of line starting with ^[[ until first m
Some like this:
awk '{sub(/\^\[\[38;1;[0-9][0-9]m/,x);sub(/\^\[\[39m/,x)}1'
Hello
User
I've run command line programs that output a line, and then update that line a moment later. But with ruby I can only seem to output a line and then another line.
What I have being output now:
Downloading file:
11MB 294K/s
12MB 307K/s
14MB 294K/s
15MB 301K/s
16MB 300K/s
Done!
And instead, I want to see this:
Downloading file:
11MB 294K/s
Followed a moment later by this:
Downloading file:
16MB 300K/s
Done!
The line my ruby script outputs that shows the downloaded filesize and transfer speed would be overwritten each time instead of listing the updated values as a whole new line.
I'm currently using puts to generate output, which clearly isn't designed for this case. Is there a different output method that can achieve this result?
Use \r to move the cursor to the beginning of the line. And you should not be using puts as it adds \n, use print instead. Like this:
print "11MB 294K/s"
print "\r"
print "12MB 307K/s"
One thing to keep in mind though: \r doesn't delete anything, it just moves the cursor back, so you would need to pad the output with spaces to overwrite the previous output (in case it was longer).
By default when \n is printed to the standard output the buffer is flushed. Now you might need to use STDOUT.flush after print to make sure the text get printed right away.