unitproc/bktemp-initGitRepo

   1 #!/bin/bash
   2 # Desc: Initializes a git repository
   3
   4 yell() { echo "$0: $*" >&2; }      #o Yell, Die, Try Three-Fingered Claw technique
   5 die() { yell "$*"; exit 111; }     #o Ref/Attrib: https://stackoverflow.com/a/25515370
   6 try() { "$@" || die "cannot $*"; } #o
   7 checkURL() {
   8     # Desc: Checks if string is a valid URL.
   9     # Warning: Does not correctly handle multi-byte characters.
  10     # Version: 0.0.2
  11     # Input: arg1: string
  12     # Output: return code 0: string is a valid URL
  13     #         return code 1: string is NOT a valid URL
  14     # Depends: Bash 5.0.3
  15     # Ref/Attrib: https://stackoverflow.com/a/3184819
  16     regex='(https?|ftp|file|ssh|git)://[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|]'
  17     arg1="$1";
  18     if [[ $arg1 =~ $regex ]]; then
  19         return 0;
  20     else
  21         return 1;
  22     fi;
  23 } # Check if arg1 is valid URL
  24 initGitRepo() {
  25     # Desc: Creates, adds remotes to, and pulls to git repository
  26     # Note: Does nothing if repoDir is already initialized git repo.
  27     # Usage: createGitRepo arg1 arg2 arg3 arg4
  28     # Input: arg1: repoURL
  29     #        arg2: repoDir
  30     #        arg3: remoteName
  31     #        arg4: branchName
  32     # Version: 0.0.4
  33     # Depends: checkURL() 0.0.2, yell(), Bash 5.0.3
  34     # Ref/Attrib: [1]: Test for space-less alphanuemric string. https://unix.stackexchange.com/a/416120
  35     #             [2]: Test for argument count. https://stackoverflow.com/q/18568706
  36     #             [3]: Test if dir is (in) git repository. https://stackoverflow.com/a/39518382
  37     #==BEGIN Validate input arguments==
  38     arg1="$1";
  39     arg2="$2";
  40     arg3="$3";
  41     arg4="$4";
  42     # Validate repoURL
  43     if checkURL "$arg1"; then repoURL="$arg1";
  44     else yell "ERROR:Not a valid URL:$arg1"; return 1; fi;
  45
  46     # Validate remoteName
  47     if [[ "$arg3" =~ ^[[:alnum:]]+$ ]]; then remoteName="$arg3";
  48     else yell "ERROR:Not a valid remote name:$arg3"; return 1; fi;  # See [1].
  49
  50     # Validate branchName
  51     if [[ "$arg4" =~ ^[[:alnum:]]+$ ]]; then branchName="$arg4";
  52     else yell "ERROR:Not a valid remote branch name:$arg4"; return 1; fi;  # See [1].
  53
  54     # Check argument count
  55     if [[ $# -gt 4 ]]; then yell "ERROR:Too many arguments."; return 1; fi;  # See [2].
  56     #==END Validate input arguments==
  57     #==BEGIN create and populate git repository==
  58     if [[ ! -d "$repoDir" ]]; then mkdir "$repoDir"; fi;
  59     pushd "$repoDir" || return 1;
  60     if ! git -C "$(pwd)" rev-parse 1>/dev/null 2>&1; then
  61         yell "STATUS:Initializing as git repo:$repoDir";
  62         git init;  # Init repo if not already a git repo. See [3]
  63     else
  64         yell "STATUS:Already a git repository:$repoDir";
  65         git status; git remote -v;
  66         yell "STATUS:Pausing 4 seconds..."; sleep 4;
  67     fi;
  68     yell "STATUS:Adding $repoURL as remote $remoteName";
  69     git remote add "$remoteName" "$repoURL";
  70     yell "STATUS:Pulling branch $branchName from remote $remoteName";
  71     git pull "$remoteName" "$branchName";
  72     unset repoURL repoDir remoteName branchName;
  73     popd || exit 1;
  74     #==END create and populate git repository==
  75 } # Init Git Repository
  76
  77 #==BEGIN test code
  78 tmpDir=/tmp/"$(date +%Y%m%dT%H%M%S%z)";
  79 mkdir -p "$tmpDir";
  80 pushd "$tmpDir" || exit 1;
  81
  82 repoURL="https://zdv2.bktei.com/gitweb/baltakatei-exdev.git";
  83 repoDir="BK-2020-03..bkexdev";
  84 remoteName="zdv2";
  85 branchName="master";
  86 initGitRepo "$repoURL" "$repoDir" "$remoteName" "$branchName";
  87 unset repoURL repoDir remoteName branchName;
  88
  89 yell "STATUS:Done.";
  90 #==END test code