Given a shell script (with conditions, concatenations and interpolations) that builds and executes certain commands (in my case calls to ImageMagick's convert cli), is there a way to list the commands that were executed in that script? Since the script calls convert multiple times substituting args, I'd like to get a list like the following.
convert ...
convert ...
convert ...
...
I'm using zsh in OS X, but can switch to bash, etc.
Stick a
set -x
at the top of your script. Works in bash, should work in zsh.
set -x affect all the nested contexts too? Maybe a global shell variable?
strace -f -o >(grep '^[0-9]\+ \+exec' > script.strace) /path/to/script.zsh (I know about strace -e option, but I do not want to remember all variants of exec function). Note that it will catch only launching of external processes, it won't catch every shell command.
set -x to /tmp/somedir/.zshenv and run the script with ZDOTDIR=/tmp/somedir /path/to/script. For ksh scripts, set ENV=/tmp/env.sh where env.sh contains set -x. For bash scripts, set BASH_ENV.
In zsh (maybe only with oh-my-zsh enabled) I find there's a lot of noise produced with set -x or setopt xtrace.
But you can also:
typeset -ft <function_name>
to trace only one function.
To turn it off:
typeset +ft <function_name>
Adapted from the A User's Guide to the Z-Shell.
