impossible to find an answer to that:
i would like to create a log history of my command line automatically without having to do anything.
For that i found some clues, i modified my .bash_profile
but i need to exclude some command that i don't want in my log like "ls, cd, etc."
this doesn't work, and i can't d
so here's my code:
# log every command typed and when
command_out=( "more" "less" "cd" "open" "ls" "pwd" "nano" "man" "help") #array of command i don't want to save in my log
my_TEST=0 ##setup a var
FIRST_COMMAND=$(echo $BASH_COMMAND| cut -d' ' -f 1) ##get only the first command
## test if the first command is in the array
for elm in "${command_out[#]}"; do
if [[ $FIRST_COMMAND == $elm ]]; then
echo $elm # does not work
$my_TEST=1 ## if the command is in the array the var is setup to 1
fi
done
if [[ $my_TEST == 0 ]] && [ -n "${BASH_VERSION}" ]; then
trap "caller >/dev/null || \
printf '%s\\n' \"\$(date '+%Y-%m-%dT%H:%M:%S%z')\
\$(tty) \${BASH_COMMAND}\" 2>/dev/null >>~/.command_log" DEBUG
fi
if you any other ideas of how to do what i want i'm open
Thanks you
Bash automatically keeps a history of every command you type; you can use the history command to view it. If you want to exclude certain commands, rather than trying to exclude them from the log, I would skip them when viewing it, e.g. history | egrep -vw 'ls|cd|other|commands|here'.
You can set HISTTIMEFORMAT to get a timestamp with every entry, control how many commands are kept with HISTFILESIZE, and if you really want to keep some commands out instead of just not seeing them when you look, you can list them in HISTIGNORE. See https://www.gnu.org/software/bash/manual/html_node/Using-History-Interactively.html.
Your ~/.bash_history file should already contain your complete command history. You could use something like
cat ~/.bash_history | grep -v cd | egrep -v 'cd|ls|...'
to filter out the commands you're not interested in.
So for the list you specified:
cat ~/.bash_history | egrep -v 'more|less|cd|open|ls|pwd|nano|man|help'
I completed Mark Reed answer with what i precisely wanted. Here is my code:
# changes the .bash_history file mode to append
shopt -s histappend
#configures the history -a command to be run at each shell prompt. The -a immediately writes the current/new lines to the history file.
PROMPT_COMMAND="history -a;$PROMPT_COMMAND"
#list of command i don't want in my history
HISTIGNORE='ls*:exit:pwd:clear:cd*:man*:more*:less*:head*:tail*:nano*:open*:help*'
#set no limit to the history file size
HISTSIZE= HISTFILESIZE=
Related
How do you use a command line argument as a file path and check for file existence in Bash?
I have the simple Bash script test.sh:
#!/bin/bash
set -e
echo "arg1=$1"
if [ ! -f "$1" ]
then
echo "File $1 does not exist."
exit 1
fi
echo "File exists!"
and in the same directory, I have a data folder containing stuff.txt.
If I run ./test.sh data/stuff.txt I see the expected output:
arg1=data/stuff.txt
"File exists!"
However, if I call this script from a second script test2.sh, in the same directory, like:
#!/bin/bash
fn="data/stuff.txt"
./test.sh $fn
I get the mangled output:
arg1=data/stuff.txt
does not exist
Why does the call work when I run it manually from a terminal, but not when I run it through another Bash script, even though both are receiving the same file path? What am I doing wrong?
Edit: The filename does not have spaces. Both scripts are executable. I'm running this on Ubuntu 18.04.
The filename was getting an extra whitespace character added to it as a result of how I was retrieving it in my second script. I didn't note this in my question, but I was retrieving the filename from folder list over SSH, like:
fn=$(ssh -t "cd /project/; ls -t data | head -n1" | head -n1)
Essentially, I wanted to get the filename of the most recent file in a directory on a remote server. Apparently, head includes the trailing newline character. I fixed it by changing it to:
fn=$(ssh -t "cd /project/; ls -t data | head -n1" | head -n1 | tr -d '\n' | tr -d '\r')
Thanks to #bigdataolddriver for hinting at the problem likely being an extra character.
I'd like to save the current directory where the each command was issued alongside the command in the history. In order not to mess things up, I was thinking about adding the current directory as a comment at the end of the line. An example might help:
$ cd /usr/local/wherever
$ grep timmy accounts.txt
I'd like bash to save the last command as:
grep timmy accounts.txt # /usr/local/wherever
The idea is that this way I could immediately see where I issued the command.
One-liner version
Here is a one-liner version. It's the original. I've also posted a short function version and a long function version with several added features. I like the function versions because they won't clobber other variables in your environment and they're much more readable than the one-liner. This post has some information on how they all work which may not be duplicated in the others.
Add the following to your ~/.bashrc file:
export PROMPT_COMMAND='hpwd=$(history 1); hpwd="${hpwd# *[0-9]* }"; if [[ ${hpwd%% *} == "cd" ]]; then cwd=$OLDPWD; else cwd=$PWD; fi; hpwd="${hpwd% ### *} ### $cwd"; history -s "$hpwd"'
This makes a history entry that looks like:
rm subdir/file ### /some/dir
I use ### as a comment delimiter to set it apart from comments that the user might type and to reduce the chance of collisions when stripping old path comments that would otherwise accumulate if you press enter on a blank command line. Unfortunately, the side affect is that a command like echo " ### " gets mangled, although that should be fairly rare.
Some people will find the fact that I reuse the same variable name to be unpleasant. Ordinarily I wouldn't, but here I'm trying to minimize the footprint. It's easily changed in any case.
It blindly assumes that you aren't using HISTTIMEFORMAT or modifying the history in some other way. It would be easy to add a date command to the comment in lieu of the HISTTIMEFORMAT feature. However, if you need to use it for some reason, it still works in a subshell since it gets unset automatically:
$ htf="%Y-%m-%d %R " # save it for re-use
$ (HISTTIMEFORMAT=$htf; history 20)|grep 11:25
There are a couple of very small problems with it. One is if you use the history command like this, for example:
$ history 3
echo "hello world" ### /home/dennis
ls -l /tmp/file ### /home/dennis
history 3
The result will not show the comment on the history command itself, even though you'll see it if you press up-arrow or issue another history command.
The other is that commands with embedded newlines leave an uncommented copy in the history in addition to the commented copy.
There may be other problems that show up. Let me know if you find any.
How it works
Bash executes a command contained in the PROMPT_COMMAND variable each time the PS1 primary prompt is issued. This little script takes advantage of that to grab the last command in the history, add a comment to it and save it back.
Here it is split apart with comments:
hpwd=$(history 1) # grab the most recent command
hpwd="${hpwd# *[0-9]* }" # strip off the history line number
if [[ ${hpwd%% *} == "cd" ]] # if it's a cd command, we want the old directory
then # so the comment matches other commands "where *were* you when this was done?"
cwd=$OLDPWD
else
cwd=$PWD
fi
hpwd="${hpwd% ### *} ### $cwd" # strip off the old ### comment if there was one so they
# don't accumulate, then build the comment
history -s "$hpwd" # replace the most recent command with itself plus the comment
hcmnt - long function version
Here is a long version in the form of a function. It's a monster, but it adds several useful features. I've also posted a one-liner (the original) and a shorter function. I like the function versions because they won't clobber other variables in your environment and
they're much more readable than the one-liner. Read the entry for the one-liner and the commments in the function below for additional information on how it works and some limitations. I've posted each version in its own answer in order to keep things more organized.
To use this one, save it in a file called hcmnt in a location like /usr/local/bin (you can chmod +x it if you want) then source it in your ~/.bashrc like this:
source /usr/local/bin/hcmnt
export hcmntextra='date "+%Y%m%d %R"'
export PROMPT_COMMAND='hcmnt'
Don't edit the function's file where PROMPT_COMMAND or hcmntextra are set. Leave them as is so they remain as defaults. Include them in your .bashrc as shown above and edit them there to set options for hcmnt or to change or unset hcmntextra. Unlike the short function, with this one you must both have the hcmntextra variable set and use the -e option to make that feature work.
You can add several options which are documented (with a couple of examples) in the comments in the function. One notable feature is to have the history entry with appended comment logged to a file and leave the actual history untouched. In order to use this function, just
add the -l filename option like so:
export PROMPT_COMMAND="hcmnt -l ~/histlog"
You can use any combination of options, except that -n and -t are mutually exclusive.
#!/bin/bash
hcmnt() {
# adds comments to bash history entries (or logs them)
# by Dennis Williamson - 2009-06-05 - updated 2009-06-19
# http://stackoverflow.com/questions/945288/saving-current-directory-to-bash-history
# (thanks to Lajos Nagy for the idea)
# the comments can include the directory
# that was current when the command was issued
# plus optionally, the date or other information
# set the bash variable PROMPT_COMMAND to the name
# of this function and include these options:
# -e - add the output of an extra command contained in the hcmntextra variable
# -i - add ip address of terminal that you are logged in *from*
# if you're using screen, the screen number is shown
# if you're directly logged in, the tty number or X display number is shown
# -l - log the entry rather than replacing it in the history
# -n - don't add the directory
# -t - add the from and to directories for cd commands
# -y - add the terminal device (tty)
# text or a variable
# Example result for PROMPT_COMMAND='hcmnt -et $LOGNAME'
# when hcmntextra='date "+%Y%m%d %R"'
# cd /usr/bin ### mike 20090605 14:34 /home/mike -> /usr/bin
# Example for PROMPT_COMMAND='hcmnt'
# cd /usr/bin ### /home/mike
# Example for detailed logging:
# when hcmntextra='date "+%Y%m%d %R"'
# and PROMPT_COMMAND='hcmnt -eityl ~/.hcmnt.log $LOGNAME#$HOSTNAME'
# $ tail -1 ~/.hcmnt.log
# cd /var/log ### dave#hammerhead /dev/pts/3 192.168.1.1 20090617 16:12 /etc -> /var/log
# INSTALLATION: source this file in your .bashrc
# will not work if HISTTIMEFORMAT is used - use hcmntextra instead
export HISTTIMEFORMAT=
# HISTTIMEFORMAT still works in a subshell, however, since it gets unset automatically:
# $ htf="%Y-%m-%d %R " # save it for re-use
# $ (HISTTIMEFORMAT=$htf; history 20)|grep 11:25
local script=$FUNCNAME
local hcmnt=
local cwd=
local extra=
local text=
local logfile=
local options=":eil:nty"
local option=
OPTIND=1
local usage="Usage: $script [-e] [-i] [-l logfile] [-n|-t] [-y] [text]"
local newline=$'\n' # used in workaround for bash history newline bug
local histline= # used in workaround for bash history newline bug
local ExtraOpt=
local LogOpt=
local NoneOpt=
local ToOpt=
local tty=
local ip=
# *** process options to set flags ***
while getopts $options option
do
case $option in
e ) ExtraOpt=1;; # include hcmntextra
i ) ip="$(who --ips -m)" # include the terminal's ip address
ip=($ip)
ip="${ip[4]}"
if [[ -z $ip ]]
then
ip=$(tty)
fi;;
l ) LogOpt=1 # log the entry
logfile=$OPTARG;;
n ) if [[ $ToOpt ]]
then
echo "$script: can't include both -n and -t."
echo $usage
return 1
else
NoneOpt=1 # don't include path
fi;;
t ) if [[ $NoneOpt ]]
then
echo "$script: can't include both -n and -t."
echo $usage
return 1
else
ToOpt=1 # cd shows "from -> to"
fi;;
y ) tty=$(tty);;
: ) echo "$script: missing filename: -$OPTARG."
echo $usage
return 1;;
* ) echo "$script: invalid option: -$OPTARG."
echo $usage
return 1;;
esac
done
text=($#) # arguments after the options are saved to add to the comment
text="${text[*]:$OPTIND - 1:${#text[*]}}"
# *** process the history entry ***
hcmnt=$(history 1) # grab the most recent command
# save history line number for workaround for bash history newline bug
histline="${hcmnt% *}"
hcmnt="${hcmnt# *[0-9]* }" # strip off the history line number
if [[ -z $NoneOpt ]] # are we adding the directory?
then
if [[ ${hcmnt%% *} == "cd" ]] # if it's a cd command, we want the old directory
then # so the comment matches other commands "where *were* you when this was done?"
if [[ $ToOpt ]]
then
cwd="$OLDPWD -> $PWD" # show "from -> to" for cd
else
cwd=$OLDPWD # just show "from"
fi
else
cwd=$PWD # it's not a cd, so just show where we are
fi
fi
if [[ $ExtraOpt && $hcmntextra ]] # do we want a little something extra?
then
extra=$(eval "$hcmntextra")
fi
# strip off the old ### comment if there was one so they don't accumulate
# then build the string (if text or extra aren't empty, add them plus a space)
hcmnt="${hcmnt% ### *} ### ${text:+$text }${tty:+$tty }${ip:+$ip }${extra:+$extra }$cwd"
if [[ $LogOpt ]]
then
# save the entry in a logfile
echo "$hcmnt" >> $logfile || echo "$script: file error." ; return 1
else
# workaround for bash history newline bug
if [[ $hcmnt != ${hcmnt/$newline/} ]] # if there a newline in the command
then
history -d $histline # then delete the current command so it's not duplicated
fi
# replace the history entry
history -s "$hcmnt"
fi
} # END FUNCTION hcmnt
# set a default (must use -e option to include it)
export hcmntextra='date "+%Y%m%d %R"' # you must be really careful to get the quoting right
# start using it
export PROMPT_COMMAND='hcmnt'
update 2009-06-19: Added options useful for logging (ip and tty), a workaround for the duplicate entry problem, removed extraneous null assignments
You could install Advanced Shell History, an open source tool that writes your bash or zsh history to a sqlite database. This records things like the current working directory, the command exit code, command start and stop times, session start and stop times, tty, etc.
If you want to query the history database, you can write your own SQL queries, save them and make them available within the bundled ash_query tool. There are a few useful prepackaged queries, but since I know SQL pretty well, I usually just open the database and query interactively when I need to look for something.
One query I find very useful, though, is looking at the history of the current working directory. It helps me remember where I left off when I was working on something.
vagrant#precise32:~$ ash_query -q CWD
session
when what
1
2014-08-27 17:13:07 ls -la
2014-08-27 17:13:09 cd .ash
2014-08-27 17:16:27 ls
2014-08-27 17:16:33 rm -rf advanced-shell-history/
2014-08-27 17:16:35 ls
2014-08-27 17:16:37 less postinstall.sh
2014-08-27 17:16:57 sudo reboot -n
And the same history using the current working directory (and anything below it):
vagrant#precise32:~$ ash_query -q RCWD
session
where
when what
1
/home/vagrant/advanced-shell-history
2014-08-27 17:11:34 nano ~/.bashrc
2014-08-27 17:12:54 source /usr/lib/advanced_shell_history/bash
2014-08-27 17:12:57 source /usr/lib/advanced_shell_history/bash
2014-08-27 17:13:05 cd
/home/vagrant
2014-08-27 17:13:07 ls -la
2014-08-27 17:13:09 cd .ash
/home/vagrant/.ash
2014-08-27 17:13:10 ls
2014-08-27 17:13:11 ls -l
2014-08-27 17:13:16 sqlite3 history.db
2014-08-27 17:13:43 ash_query
2014-08-27 17:13:50 ash_query -Q
2014-08-27 17:13:56 ash_query -q DEMO
2014-08-27 17:14:39 ash_query -q ME
2014-08-27 17:16:26 cd
/home/vagrant
2014-08-27 17:16:27 ls
2014-08-27 17:16:33 rm -rf advanced-shell-history/
2014-08-27 17:16:35 ls
2014-08-27 17:16:37 less postinstall.sh
2014-08-27 17:16:57 sudo reboot -n
FWIW - I'm the author and maintainer of the project.
hcmnts - short function version
Here is a short version in the form of a function. I've also posted a one-liner (the original) and a longer function with several added features. I like the function versions because they won't clobber other variables in your environment and they're much more readable than the one-liner. Read the entry for the one-liner for additional information on how this works and some limitations. I've posted each version in its own answer in order to keep things more organized.
To use this one, save it in a file called hcmnts in a location like /usr/local/bin (you can chmod +x it if you want) then source it in your ~/.bashrc like this:
source /usr/local/bin/hcmnts
Comment out the line that sets hcmntextra if you don't want the date and time (or you can change its format or use some other command besides date).
That's all there is to it.
#!/bin/bash
hcmnts() {
# adds comments to bash history entries
# the *S*hort version of hcmnt (which has many more features)
# by Dennis Williamson
# http://stackoverflow.com/questions/945288/saving-current-directory-to-bash-history
# (thanks to Lajos Nagy for the idea)
# INSTALLATION: source this file in your .bashrc
# will not work if HISTTIMEFORMAT is used - use hcmntextra instead
export HISTTIMEFORMAT=
# HISTTIMEFORMAT still works in a subshell, however, since it gets unset automatically:
# $ htf="%Y-%m-%d %R " # save it for re-use
# $ (HISTTIMEFORMAT=$htf; history 20)|grep 11:25
local hcmnt
local cwd
local extra
hcmnt=$(history 1)
hcmnt="${hcmnt# *[0-9]* }"
if [[ ${hcmnt%% *} == "cd" ]]
then
cwd=$OLDPWD
else
cwd=$PWD
fi
extra=$(eval "$hcmntextra")
hcmnt="${hcmnt% ### *}"
hcmnt="$hcmnt ### ${extra:+$extra }$cwd"
history -s "$hcmnt"
}
export hcmntextra='date +"%Y%m%d %R"'
export PROMPT_COMMAND='hcmnts'
For those who want this in zsh I've modified Jeet Sukumaran's implementation and percol to allow interactive keyword searching and extraction of either the command or path it was executed in. It's also possible to filter out duplicate commands and hide fields (date, command, path)
Here's a one liner of what I use. Sticking it here because it's vastly simpler, and I have no problem with per-session history, I just also want to have a history with the working directory.
Also the one-liner above mucks with your user interface too much.
export PROMPT_COMMAND='if [ "$(id -u)" -ne 0 ]; then echo "$(date "+%Y-%m-%d.%H:%M:%S") $(pwd) $(history 1)" >> ~/.bash.log; fi'
Since my home dir is typically a cross-mounted gluster thingy, this has the side effect of being a history of everything I've ever done. Optionally add $(hostname) to the echo command above... depending on your working environment.
Even with 100k entries, grep is more than good enough. No need to sqlite log it. Just don't type passwords on the command line and you're good. Passwords are 90's tech anyway!
Also, for searching I tend to do this:
function hh() {
grep "$1" ~/.bash.log
}
Gentleman this works better.. The only thing I can not figure out is how to make the script NOT log to syslog on login and log the last command in history. But works like a charm so far.
#!/bin/bash
trackerbash() {
# adds comments to bash history entries
# by Dennis Williamson
# http://stackoverflow.com/questions/945288/saving-current-directory-to-bash-history
# (thanks to Lajos Nagy for the idea)
#Supper Enhanced by QXT
# INSTALLATION: source this file in your .bashrc
export HISTTIMEFORMAT=
# export HISTTIMEFORMAT='%F %T '
local hcmnt
local cwd
local extra
local thistty
local whoiam
local sudouser
local shelldate
local TRACKIP
local TRACKHOST
thistty=`/usr/bin/tty|/bin/cut -f3-4 -d/`
whoiam=`/usr/bin/whoami`
sudouser=`last |grep $thistty |head -1 | awk '{ print $1 }' |cut -c 1-10`
hcmnt=$(history 1)
hcmnt="${hcmnt# *[0-9]* }"
cwd=`pwd`
hcmnt="${hcmnt% ### *}"
hcmnt=" $hcmnt ${extra:+$extra }"
shelldate=`date +"%Y %b %d %R:%S"`
TRACKHOST=`whoami | sed -r "s/.*\((.*)\).*/\\1/"`
TRACKIP=`last |grep $thistty |head -1 | awk '{ print $3 }'`
logger -p local1.notice -t bashtracker -i -- "$sudouser ${USER}: $thistty: $TRACKIP: $shelldate: $cwd : $hcmnt"
history -w
}
export PROMPT_COMMAND='trackerbash'
Full disclosure: I'm the author of the FOSS-tool
shournal - A (file-) journal for your shell:
Using it's bash integration, the working directory of a command is also stored within shournal's sqlite-database and can be retrieved via
shournal --query -cmdcwd "$PWD"
Querying for sub-working-directories can be done with
shournal --query -cmdcwd -like "$PWD/%"
You could consider an independent project (I wrote it) that supports saving the path for each command: https://github.com/chrissound/MoscoviumOrange
Where you can add a hook into Bash to save each entry with:
$(jq -n --arg command "$1" --arg path "$PWD" '{"command":$command, "path":$path}' | "$(echo 'readlink -f $(which nc)' | nix run nixpkgs.netcat)" -N -U ~/.config/moscoviumOrange/monitor.soc &)
And I started playing with dmenu and it seems such an automation for almost every thing. Unfortunately I'm not familiar with bash and it should be on my list.
I have a folder for my markdowns with subfolders containing my files. I'm trying to have a script to show them in dmenu while using an alias.
If the path to a file is
/home/user/docs/markdown/practice01/rmd/network.rmd
I would like to have
network
as an option in my dmenu. So when I choose
network -----> /home/user/docs/markdown/practice01/rmd/network.rmd
Here is my broken script. There are a few things I'm missing.
This way I get full path on my dmenu which i don't need. I tried to read about associative arrays but I can't figure it out in bash.
This script works but in case I decide to ESC and exit, still it opens up an empty vim in my directory. Hence, I should know if statements huh!
#!/bin/bash
DMenu=("dmenu -l 10 -i -nb "#eaeaea" -sb "#E53935" -nf "#474747"")
cd ~/docs/markdown/
target=$(find -type f -name '*.rmd' | $DMenu)
st vim "$target"
I made a little example. But the problem is that it is a manual work to add each file, which definitely we don't wanna do right!
#!/bin/bash
declare -A dotfiles
dotfiles[i3]="/home/user/dotfiles/i3/.config/i3/config"
dotfiles[vimrc]="/home/user/dotfiles/vim/.vimrc"
list=("i3\nvimrc")
target=$(echo -e $list | dmenu -i -nb "#eaeaea" -sb "#E53935" -nf "#474747")
st vim "${dotfiles["$target"]}"
Thank you
Associative arrays can be weird... but returning output to a variable makes it easier to manipulate as any other string in bash, as shown in the example below:
prefix="$HOME/git/notes"
suffix=".md"
shopt -s nullglob globstar
item=( "$prefix"/**/*${suffix}) # Search *.md in all dirs/subdirs
item=( "${item[#]#"$prefix"/}" )
item=( "${item[#]%${suffix}}" ) # Removes '.md' string from item name
result=$(printf '%s\n' "${item[#]}" | dmenu)
[[ -n $result ]] || exit # exit if nothing is found
gedit "${prefix}/${result}.md" # Open file by adding again '.md'
When the percent sign (%) is used in the pattern ${variable%substring}, it will return content of the variable with the shortest occurrence of substring deleted from the back of the variable.
Listed below for reference are 2 examples I wrote, one in Bash and the other in Python, for managing pass and markdown notes with dmenu:
dmenu-pass.sh
dmenu-launch.py
Also, listed below are a couple nice articles that might help you out:
The weird, wondrous world of Bash arrays
Advanced Bash-Scripting Guide: Manipulating Strings
Instead of putting some code in an array, use a function!
my_dmenu() {
dmenu -l 10 -i -nb "#eaeaea" -sb "#e53935" -nf "#474747"
}
If your markdown files are all in the same folder (and not in subfolders), you certainly don't need find: use a glob instead! and if your files are in subfolders, use a glob instead (with the globstar shell option).
All in all:
#!/bin/bash
my_dmenu() {
dmenu -l 10 -i -nb "#eaeaea" -sb "#e53935" -nf "#474747"
}
base_dir=~/docs/markdown
# Also, check the return code of cd!
cd "$base_dir" || { echo >&2 "Can't cd to $base_dir. Exiting"; exit 1; }
# Using a glob: use the shell option nullglob
shopt -s nullglob
files=( *.rmd )
# Check that there are some files found:
if (( ${#files[#]} == 0 )); then
echo "No files found. Exiting."
exit 1
fi
# Now we're ready to send the files to dmenu:
chosen_file=$(printf '%s\n' "${files[#]}" | my_dmenu)
# If dmenu returns nothing: don't launch vim!
if [[ ! $chosen_file ]]; then
echo "No files selected. Exiting."
exit 1
fi
# Now you can launch vim!
st vim "$chosen_file"
If you also want to find the *.rmd files in subfolders: use instead:
shopt -s nullglob globstar
files=( **/*.rmd )
Edit to address the requirement in your comment (and the edit of your question):
If you want to strip the .rmd suffix to show in dmenu, use:
chosen_file=$(printf '%s\n' "${files[#]%.rmd}" | my_dmenu)
# ...
st vim "$chosen_file.rmd"
The expansion ${files[#]%.rmd} will strip the suffix .rmd from each field of the array files. Don't forget to add this suffix back when you edit the file (as shown in the last line).
dmenuoptions="-l 10 -i -nb '#eaeaea' -sb '#E53935' -nf '#474747'"
st -e vim $(find ~/docs/markdown -type f -name '*.rmd' | dmenu $dmenuoptions)
I wrote a basic script which changes the directory to a specific path and shows the list of folders, but my script shows the list of files of the current folder where my script lies instead of which I specify in script.
Here is my script:
#!/bin/bash
v1="$(ls -l | awk '/^-/{ print $NF }' | rev | cut -d "_" -f2 | rev)"
v2=/home/PS212-28695/logs/
cd $v2 && echo $v1
Does any one knows what I am doing wrong?
Your current script makes no sense really. v1 variable is NOT a command to execute as you expect, but due to $() syntax it is in fact output of ls -t at the moment of assignment and that's why you have files from current directory there as this is your working directory at that particular moment. So you should rather be doing ordinary
ls -t /home/PS212-28695/logs/
EDIT
it runs but what if i need to store the ls -t output to variable
Then this is same syntax you already had, but with proper arguments:
v1=$(ls -t /home/PS212-28695/logs/)
echo ${v1}
If for any reason you want to cd then you have to do that prior setting v1 for the same reason I explained above.
Makefile's targets are available by completion on Linux but, AFAICS, not on Mac OS (10.8.5).
Is it possible to get completion working with this OS?
This seems to achieve simple bash completions for me on El Capitan:
# .bashrc
function _makefile_targets {
local curr_arg;
local targets;
# Find makefile targets available in the current directory
targets=''
if [[ -e "$(pwd)/Makefile" ]]; then
targets=$( \
grep -oE '^[a-zA-Z0-9_-]+:' Makefile \
| sed 's/://' \
| tr '\n' ' ' \
)
fi
# Filter targets based on user input to the bash completion
curr_arg=${COMP_WORDS[COMP_CWORD]}
COMPREPLY=( $(compgen -W "${targets[#]}" -- $curr_arg ) );
}
complete -F _makefile_targets make
Here's how this works:
complete -F [function name] [command name] -- this bash builtin register a new completion for [command name] which is generated by the bash function [function name]. So in my code above, if you type make [TAB][TAB] into your shell, you'll trigger the _makefile_targets() function.
if [[ -e "$(pwd)/Makefile" ]]; then -- make sure there's a Makefile in the current directory, otherwise don't try a bash completion.
grep -oE '^[a-zA-Z0-9_-]+:' Makefile -- filter every line of Makefile using the regex for a target name like "test:". -o means only return the part of the line that matches. For example, given a Makefile target like "test: build package", only "test:" will be returned
| sed 's/://' -- taking the grep results, remove the colon from the end of line
| tr '\n' ' ' -- smoosh all targets onto one line, separated by one space
Inside a bash completion function, complete sets several environment variables for you. COMP_WORDS is an array of the list of available bash completion choises based on what the user typed. COMP_CWORD is the index of the currently selected word.
Another very magical builtin compgen will take a list of space separately strings and filter them using the currently selected word. I'm not at all clear how that works.
So, the bottom line is that the last two lines in the function filter our list of makefile targets (stored inside $targets) and shoves them into an array COMPREPLY. The bash completion reads and displays COMPREPLY as choices in the shell.
Inspired by:
https://gist.github.com/tlrobinson/1073865
http://www.thegeekstuff.com/2013/12/bash-completion-complete/ (Esp 9.)
This worked for me on Catalina in the standard zsh terminal
Edit the file named .zshrc in you home directory this can be done with this command in the terminal nano ~/.zshrc
Add the following lines
zstyle ':completion:*:*:make:*' tag-order 'targets'
autoload -U compinit && compinit
exit and save by pressing ctrl + x and then save Y
For macOS Monterey, the following works:
Edit the .zprofile file in your home directory. This can be done with a text editor. Path: ~/.zprofile
Add the following lines to the end of the file:
zstyle ':completion:*:*:make:*' tag-order 'targets'
autoload -Uz compinit && compinit
After that, everything works correctly, tips work when you press TAB.
This method does not display anything extra when entering the terminal, unlike the methods indicated above.
If you use bash and homebrew:
brew install bash-completion
follow their documentation:
Add the following line to your ~/.bash_profile:
[[ -r "$(brew --prefix)/etc/profile.d/bash_completion.sh" ]] && . "$(brew --prefix)/etc/profile.d/bash_completion.sh"
restart your terminal or
source ~/.bash_profile