unitproc/bktemp-initGitRepo

   1 #!/bin/bash
   2 # Desc: Initializes a git repository
   3
   4 #==BEGIN Define script parameters==
   5 #==END Define script parameters==
   6
   7 #===BEGIN Declare local script functions===
   8 yell() { echo "$0: $*" >&2; }      #o Yell, Die, Try Three-Fingered Claw technique
   9 die() { yell "$*"; exit 111; }     #o Ref/Attrib: https://stackoverflow.com/a/25515370
  10 try() { "$@" || die "cannot $*"; } #o
  11 checkURL() {
  12     # Desc: Checks if string is a valid URL.
  13     # Warning: Does not correctly handle multi-byte characters.
  14     # Version: 0.0.2
  15     # Input: arg1: string
  16     # Output: return code 0: string is a valid URL
  17     #         return code 1: string is NOT a valid URL
  18     # Depends: Bash 5.0.3
  19     # Ref/Attrib: https://stackoverflow.com/a/3184819
  20     regex='(https?|ftp|file|ssh|git)://[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|]'
  21     arg1="$1";
  22     if [[ $arg1 =~ $regex ]]; then
  23         return 0;
  24     else
  25         return 1;
  26     fi;
  27 } # Check if arg1 is valid URL
  28 initGitRepo() {
  29     # Desc: Creates, adds remotes to, and pulls to git repository
  30     # Note: Does nothing if repoDir is already initialized git repo.
  31     # Usage: createGitRepo arg1 arg2 arg3 arg4
  32     # Input: arg1: repoURL
  33     #        arg2: repoDir
  34     #        arg3: remoteName
  35     #        arg4: branchName
  36     # Version: 0.0.4
  37     # Depends: checkURL() 0.0.2, yell(), Bash 5.0.3
  38     # Ref/Attrib: [1]: Test for space-less alphanuemric string. https://unix.stackexchange.com/a/416120
  39     #             [2]: Test for argument count. https://stackoverflow.com/q/18568706
  40     #             [3]: Test if dir is (in) git repository. https://stackoverflow.com/a/39518382
  41     #==BEGIN Validate input arguments==
  42     arg1="$1";
  43     arg2="$2";
  44     arg3="$3";
  45     arg4="$4";
  46     # Validate repoURL
  47     if checkURL "$arg1"; then repoURL="$arg1";
  48     else yell "ERROR:Not a valid URL:$arg1"; return 1; fi;
  49
  50     # Validate remoteName
  51     if [[ "$arg3" =~ ^[[:alnum:]]+$ ]]; then remoteName="$arg3";
  52     else yell "ERROR:Not a valid remote name:$arg3"; return 1; fi;  # See [1].
  53
  54     # Validate branchName
  55     if [[ "$arg4" =~ ^[[:alnum:]]+$ ]]; then branchName="$arg4";
  56     else yell "ERROR:Not a valid remote branch name:$arg4"; return 1; fi;  # See [1].
  57
  58     # Check argument count
  59     if [[ $# -gt 4 ]]; then yell "ERROR:Too many arguments."; return 1; fi;  # See [2].
  60     #==END Validate input arguments==
  61     #==BEGIN create and populate git repository==
  62     if [[ ! -d "$repoDir" ]]; then mkdir "$repoDir"; fi;
  63     pushd "$repoDir" || return 1;
  64     if ! git -C "$(pwd)" rev-parse 1>/dev/null 2>&1; then
  65         yell "STATUS:Initializing as git repo:$repoDir";
  66         git init;  # Init repo if not already a git repo. See [3]
  67     else
  68         yell "STATUS:Already a git repository:$repoDir";
  69         git status; git remote -v;
  70         yell "STATUS:Pausing 4 seconds..."; sleep 4;
  71     fi;
  72     yell "STATUS:Adding $repoURL as remote $remoteName";
  73     git remote add "$remoteName" "$repoURL";
  74     yell "STATUS:Pulling branch $branchName from remote $remoteName";
  75     git pull "$remoteName" "$branchName";
  76     unset repoURL repoDir remoteName branchName;
  77     popd || exit 1;
  78     #==END create and populate git repository==
  79 } # Init Git Repository
  80 #===END Declare local script functions===
  81
  82 #==BEGIN sample code
  83 tmpDir=/tmp/"$(date +%Y%m%dT%H%M%S%z)";
  84 mkdir -p "$tmpDir";
  85 pushd "$tmpDir" || exit 1;
  86
  87 repoURL="https://zdv2.bktei.com/gitweb/baltakatei-exdev.git";
  88 repoDir="BK-2020-03..bkexdev";
  89 remoteName="zdv2";
  90 branchName="master";
  91 initGitRepo "$repoURL" "$repoDir" "$remoteName" "$branchName";
  92 unset repoURL repoDir remoteName branchName;
  93
  94 yell "STATUS:Done.";
  95 #==END sample code
  96
  97 # Author: Steven Baltaktei Sandoval
  98 # License: GPLv3+