Bash脚本，用于以BASH shell列出特定格式的目录中的文件

Question

I am currently working on some C++ code on a GNU/Linux system and my source-code folder is filled with .cpp files and .h files.

In general for this code, every .cpp file has a corresponding .h header file, but not necessarily vice versa. In the output below -- indicates that there is no corresponding .cpp file for the listed header file

I would like to either write a bash script to do this by say defining an extra flag in my .bashrc / .zshrc , such that the listing of the files occurs in this format. Say I have 7 files, some .cpp and some .h

$ listscript
hello1.cpp hello1.h
hello2.cpp hello2.h
   --      hello3.h 
hello4.cpp hello4.h      

Answer 1

#!/usr/bin/env bash
declare files=(*)
declare file= left= right= width=10
declare -A listed=()
for file in "${files[@]}"; do
    if [[ $file == *.h ]]; then
        continue
    elif (( ${#file} > width )); then
        width=${#file}
    fi
done
for file in "${files[@]}"; do
    if [[ ${listed[$file]} == 1 ]]; then
        continue
    elif [[ $file == *.cpp ]]; then
        left=$file right=${file%.cpp}.h
    elif [[ $file == *.h ]]; then
        left=${file%.h}.cpp right=$file
    else
        left=$file right=
    fi

    [[ $left ]]     && listed["$left"]=1
    [[ $right ]]    && listed["$right"]=1

    [[ -e $left ]]  || left='--'
    [[ -e $right ]] || right='--'

    printf "%-*s %s\n" "$width" "$left" "$right"
done

Answer 2

Since every .h file may or may not have a corresponding .cpp file, just iterate over all .h files. For each one, you can check if the corresponding .cpp file exists and use "---" if not.

for fh in *.h; do
    fcpp=${fh/%.h/.cpp}
    [ -f "$fcpp" ] || fcpp="---"
    printf "%s\t%s\n" "$fcpp" "$fh"
done

Answer 3

How about (in bash ):

for f in $(ls -1 *.{cpp,h} | sed -e 's/.cpp//;s/.h//' | sort -u)
do 
    [ -f "${f}.cpp" ] && printf "%s " "${f}.cpp" || printf " -- "
    [ -f "${f}.h" ] &&  printf "%s" "${f}.h" || printf " -- "; 
    printf "\n"
done

Answer 4

Here's my attempt in bash:

#!/bin/bash

# run like this:
# ./file_lister DIRECTORY

for i in $1/*.h
do
        name=`basename $i .h`
        if [ -e $name.cpp ]
        then
          ls $name.*
        else
          echo "-- " `basename $i`
        fi
done