My worst experience on that front was with jekyll.
Running jekyll without parameters compiles the source in the current directory, putting the output either in $PWD/_site, or wherever the config file for the project says.
I was in the parent directory, and thought I'd try to run
jekyll projectname
rather than having to cd in and out of the project.
The end result? It tries to compile the project in the current directory, writing output to the directory specified. As an added bonus, it completely nukes the target directory, including the .git subdir. And to add insult to injury, $PWD didn't even contain a valid project, so it error'd out immediately after wiping out the entire source.
The morale of the story: Always keep offsite backups.
Running jekyll without parameters compiles the source in the current directory, putting the output either in $PWD/_site, or wherever the config file for the project says.
I was in the parent directory, and thought I'd try to run jekyll projectname rather than having to cd in and out of the project.
The end result? It tries to compile the project in the current directory, writing output to the directory specified. As an added bonus, it completely nukes the target directory, including the .git subdir. And to add insult to injury, $PWD didn't even contain a valid project, so it error'd out immediately after wiping out the entire source.
The morale of the story: Always keep offsite backups.