ln -s wrapper, with more useful features

lns

#!/bin/bash

spath=$(realpath "$0")
swd=${spath%/*}
source "$swd"/lns.bashlib

main "$@"

lns.hashlib

#!/bin/bash

# "We're all the roaming orphans in the immense space
# though huddling in a big spaceship called the Earth."  
#                                      -- The Martians

# if expanded_arg_num == 1
#     create a link to current dir
# if expanded_arg_num == 2
#     create a link to the specified path/dir
# if expanded_arg_num >= 3
#     if the final arg is a dir
#         create links to the dir specified by the final arg


get_fpath_list(){
    mapfile -t arr_fpath_list < <(realpath "$@")
}

lns_1_arg(){
    fpath_target=`realpath "$1"`
    ln -s "$fpath_target" 
}

lns_2_args(){
    fpath_target=`realpath "$1"`
    # path of link or path of parent dir
    fpath_link=`realpath "$2"`
    echo ""
    ln -s "$fpath_target" "$fpath_link"
}

lns_3_or_more_args(){
    length_all=${#arr_fpath_list[@]}
    length_targets=$((length_all -1))
    echo "length_targets: $length_targets"
    dpath_link="${arr_fpath_list[$length_targets]}"
    
    if [ ! -d $dpath_link ]
        then
        echo "ERR:: Destinated path is not dir: $dpath_link"". Stop."
        return 1
    fi
    
    for fpath in "${arr_fpath_list[@]:0:$length_targets}"
        do
        echo $fpath
        ln -s "$fpath" "$dpath_link"
    done
}

main(){
    get_fpath_list "$@"
    length=${#arr_fpath_list[@]}
    if [ 0 -eq $length ]
        then
        echo "ERR:: Found no link target. Stop."
        return 1
    fi
    
    if [ 1 -eq $length ]
        then
        lns_1_arg "${arr_fpath_list[@]}"
    fi
    
    if [ 2 -eq $length ]
        then
        lns_2_args "${arr_fpath_list[@]}"
    fi
    
    if [ 3 -le $length ]
        then
        lns_3_or_more_args "${arr_fpath_list[@]}"
    fi
}

test_lns.bash

#!/bin/bash

spath=$(realpath "$0")
swd=${spath%/*}

source "$swd"/testf.bashlib
source "$swd"/lns.bashlib

init_test_extra(){
    [ -d $dpath_test/d_l ] && rm -r $dpath_test/{d_l,d_t}
    mkdir $dpath_test/{d_l,d_t}
    cd $dpath_test
}

test_lns_1_arg(){
    echo "h" > $dpath_test/d_t/f_f1
    lns_1_arg "$dpath_test/d_t/f_f1" 
    rslt=$(cat f_f1)
    assert_equal_str "h" "$rslt"
}

test_lns_2_args(){
    echo "h" > $dpath_test/d_t/f_f1
    lns_2_args "$dpath_test/d_t/f_f1" "$dpath_test/d_l/f_f1"
    rslt=$(cat $dpath_test/d_l/f_f1)
    assert_equal_str "h" "$rslt"

    echo "h" > $dpath_test/d_t/f_f2
    lns_2_args "$dpath_test/d_t/f_f2" "$dpath_test/d_l"
    rslt=$(cat $dpath_test/d_l/f_f2)
    assert_equal_str "h" "$rslt"
}

test_lns_3_or_more_args(){
    arr_fpath_list=("$dpath_test/d_t/f_f3" "$dpath_test/d_t/f_f4" "$dpath_test/d_l")
    #dpath_link=$(realpath "$dpath_test/d_l")
    lns_3_or_more_args 
    ls -l "$dpath_link"/*
    fpath_f3_target=$(readlink -m "$dpath_link"/f_f3)
    actual="${fpath_f3_target#$dpath_test/d_t/}"
    assert_equal_str "f_f3" "$actual"
}

test_main_no_arg(){
    rslt=$(main)
    retval=$?
    assert_equal_num 1 $retval
}

test_main_1_arg(){
    main "$dpath_test/d_t/f_f5"
    echo "h" > $dpath_test/d_t/f_f5
    rslt=$(cat f_f5)
    assert_equal_str "h" "$rslt"
}

test_main_2_args(){
    echo "h" > $dpath_test/d_t/f_f6
    main "$dpath_test/d_t/f_f6" "$dpath_test/d_l/f_f6"
    rslt=$(cat $dpath_test/d_l/f_f6)
    assert_equal_str "h" "$rslt"

    echo "h" > $dpath_test/d_t/f_f7
    main "$dpath_test/d_t/f_f7" "$dpath_test/d_l"
    rslt=$(cat $dpath_test/d_l/f_f7)
    assert_equal_str "h" "$rslt"
}

test_main_3_args(){
    echo "h" > $dpath_test/d_t/f_f8
    echo "h" > $dpath_test/d_t/f_f9
    main "$dpath_test/d_t/f_f8" "$dpath_test/d_t/f_f9" "$dpath_test/d_l"
    rslt1=$(cat $dpath_test/d_l/f_f8)
    rslt2=$(cat $dpath_test/d_l/f_f9)
    assert_equal_str "h" "$rslt1"
    assert_equal_str "h" "$rslt2"
    
    rslt=$(main "$dpath_test/d_t/f_f10" "$dpath_test/d_t/f_f11" "$dpath_test/d_l/f_12")
    retval=$?
    assert_equal_num 1 $retval
}

test_main_4_args(){
    echo "h" > $dpath_test/d_t/f_f13
    echo "h" > $dpath_test/d_t/f_f15
    
    main "$dpath_test/d_t/f_f13" "$dpath_test/d_t/f_f14" "$dpath_test/d_t/f_f15" "$dpath_test/d_l"
    rslt1=$(cat $dpath_test/d_l/f_f13)
    rslt2=$(cat $dpath_test/d_l/f_f15)
    assert_equal_str "h" "$rslt1"
    assert_equal_str "h" "$rslt2"
}

opt="-o"

run_tests "test_lns_1_arg" "test_lns_2_args" "test_lns_3_or_more_args"
run_tests "test_main_no_arg" "test_main_1_arg" "test_main_2_args" "test_main_3_args" "test_main_4_args"

testf.bashlib

#!/bin/bash

# ####test_demo_testf.bash
# #!/bin/bash
# 
# # Usage:
# # ./test_demo_testf.bash
# 
# # Use the -o to override the check on the test dir
# # ./test_demo_testf.bash -o
#
# source ./testf.bash
# 
# test1(){
#     echo "hello"
# }
# 
# test2(){
#     echo "world"
# }
# 
# opt="$1"
# run_tests "test1" "test2"


echo_start(){
    echo "$1 ============================="
}

get_bwd(){
    # bwd: base working dir
    # cwd: current working dir
    cwd=$(realpath .)
    : ${bwd=$cwd}
}

init_time_log(){
    fpath_log="$bwd"/time.log
    if [ -f $fpath_log ]
        then
        if [ "-o" != "$opt" ]
            then
            echo "Cannot create file:: File $fpath_log exists. Exit."
            exit 1
        fi
        
        rm $fpath_log
    fi

    touch $fpath_log
}

log_datetime(){
    datef=`date '+%Y%m%d.%H%M%S'`
    echo "$1$datef" >> $fpath_log
}

init_dir(){
    dpath_test="$bwd"/test9
    if [ -e $dpath_test ]
        then
        if [ "-o" != "$opt" ]
            then
            echo "Cannot create dir:: Dir (or file) $dpath_test exists. Exit."
            exit 1
        fi
        
        rm -r $dpath_test
    fi
    
    mkdir $dpath_test
    cd $dpath_test
}

init_script_dir(){
    # to be overwritten by the calling script
    init_dir
}

init_script_extra(){
    # to be overwritten by the calling script
    :
}

finish_script_extra(){
    # to be overwritten by the calling script
    :
}

init_script(){
    echo_start "Start script $0"
    get_bwd
    init_time_log
    log_datetime "Start script $0 : "  
    init_script_dir  
    init_script_extra
}

finish_script(){
    finish_script_extra
    echo_start "Finish script $0"
    log_datetime "Finish script $0 : "
}

init_test_extra(){
    # to be overwritten by the calling script
    :
}

finish_test_extra(){
    # to be overwritten by the calling script
    :
}

init_test(){
    echo_start "Start $1 : "
    log_datetime "Start $1 : "
    init_test_extra
}

finish_test(){
    finish_test_extra
    log_datetime "Finish $1 : "
}

run_tests(){
    init_script

    for test in "$@"
        do
        init_test "$test"
        $test
        finish_test "$test"
    done

    finish_script
}

get_first_n_words_by_space(){
    line="$1"
    n="$2"
    echo $(printf "$line" | cut -d " " -f 1-"$n")
}

assert_equal_str(){
    expected="$1"
    actual="$2"
    if [ "$expected" == "$actual" ]
        then
        echo Pass
        return 0
    else  
        echo "Fail: $expected != $actual"
        return 1
    fi
}

assert_equal_num(){
    expected="$1"
    actual="$2"

    if [[ "y" == "y$expected" && "y"=="y$actual" ]]
        then
            echo "Fail: arg1:expected is '', arg2:actual is ''"
        return 1
    fi
    
    if [ "y" == "y$expected" ]
        then
        echo "Fail: arg1:expected is ''"
        return 1
    fi
    
    if [ "y" == "y$actual" ]
        then
        echo "Fail: arg2:actual is ''"
        return 1
    fi
    
    if [ $expected -eq $actual ]
        then
        echo Pass
    else  
        echo "Fail: $expected != $actual"
        return 0
    fi
}

test1(){
    # call the tested script
    :
}