build: add repo-health-job script

[UsamaSadiq]

Description

Added the repo-health-script in this repo to make it accessible to the new repo health job workflow for execution.
For further details on this change, see the discussion on the PR openedx/.github#52.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (d5ea934) 83.23% compared to head (641611b) 83.23%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #349   +/-   ##
=======================================
  Coverage   83.23%   83.23%           
=======================================
  Files          21       21           
  Lines        1163     1163           
=======================================
  Hits          968      968           
  Misses        195      195           

Flag	Coverage Δ
unittests	83.23% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
repo_health/utils.py	94.33% <0.00%> (ø)
repo_health/__init__.py	62.50% <0.00%> (ø)
repo_health/check_docs.py	86.41% <0.00%> (ø)
repo_health/check_readme.py	73.07% <0.00%> (ø)
repo_health/check_tox_ini.py	100.00% <0.00%> (ø)
repo_health/check_makefile.py	94.28% <0.00%> (ø)
repo_health/check_setup_py.py	81.63% <0.00%> (ø)
repo_health/check_existence.py	100.00% <0.00%> (ø)
repo_health/check_travis_yml.py	83.60% <0.00%> (ø)
repo_health/check_ubuntufiles.py	86.02% <0.00%> (ø)
... and 4 more

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[UsamaSadiq]

Hi @nedbat
I've tried addressing most of your concerns and reviews on the script. Please have a look at it in detail. Thanks.

[nedbat]

I ran this file through https://shellcheck.net:

[Line 11:](javascript:setPosition(11, 7))
if [[ ! -z $REPORT_DATE ]]; then REPORT_DATE=$(date '+%Y-%m-%d' -d "$REPORT_DATE"); fi
      ^-- [SC2236](https://www.shellcheck.net/wiki/SC2236) (style): Use -n instead of ! -z.
 
[Line 19:](javascript:setPosition(19, 4))
cd $WORKSPACE
   ^-- [SC2086](https://www.shellcheck.net/wiki/SC2086) (info): Double quote to prevent globbing and word splitting.

Did you mean: ([apply this](javascript:applyFixIndex([1])), apply [all SC2086](javascript:applyFixCode(2086)))
cd "$WORKSPACE"
 
[Line 21:](javascript:setPosition(21, 17))
for ORG_NAME in ${ORG_NAMES[@]}; do
                ^-- [SC2068](https://www.shellcheck.net/wiki/SC2068) (error): Double quote array expansions to avoid re-splitting elements.
                ^-- [SC2153](https://www.shellcheck.net/wiki/SC2153) (info): Possible misspelling: ORG_NAMES may not be assigned. Did you mean ORG_NAME?
 
[Line 45:](javascript:setPosition(45, 1))
COUNTER=0
^-- [SC2034](https://www.shellcheck.net/wiki/SC2034) (warning): COUNTER appears unused. Verify use (or export if used externally).
 
[Line 47:](javascript:setPosition(47, 8))
    cd $WORKSPACE
       ^-- [SC2086](https://www.shellcheck.net/wiki/SC2086) (info): Double quote to prevent globbing and word splitting.

Did you mean: ([apply this](javascript:applyFixIndex([5])), apply [all SC2086](javascript:applyFixCode(2086)))
    cd "$WORKSPACE"
 
[Line 79:](javascript:setPosition(79, 11))
    if [[ ! -z $REPORT_DATE ]]; then
          ^-- [SC2236](https://www.shellcheck.net/wiki/SC2236) (style): Use -n instead of ! -z.
 
[Line 83:](javascript:setPosition(83, 26))
            git checkout `git rev-list -n 1 --before="${REPORT_DATE} 00:00" master`
                         ^-- [SC2046](https://www.shellcheck.net/wiki/SC2046) (warning): Quote this to prevent word splitting.
                         ^-- [SC2006](https://www.shellcheck.net/wiki/SC2006) (style): Use $(...) notation instead of legacy backticks `...`.

Did you mean: ([apply this](javascript:applyFixIndex([8])), apply [all SC2006](javascript:applyFixCode(2006)))
            git checkout $(git rev-list -n 1 --before="${REPORT_DATE} 00:00" master)
 
[Line 98:](javascript:setPosition(98, 30))
          --repo-health-path ${WORKSPACE}/edx-repo-health \
                             ^-- [SC2086](https://www.shellcheck.net/wiki/SC2086) (info): Double quote to prevent globbing and word splitting.

Did you mean: ([apply this](javascript:applyFixIndex([9])), apply [all SC2086](javascript:applyFixCode(2086)))
          --repo-health-path "${WORKSPACE}"/edx-repo-health \
 
[Line 99:](javascript:setPosition(99, 23))
          --repo-path ${WORKSPACE}/target-repo \
                      ^-- [SC2086](https://www.shellcheck.net/wiki/SC2086) (info): Double quote to prevent globbing and word splitting.

Did you mean: ([apply this](javascript:applyFixIndex([10])), apply [all SC2086](javascript:applyFixCode(2086)))
          --repo-path "${WORKSPACE}"/target-repo \
 
[Line 122:](javascript:setPosition(122, 19))
failed_repo_names=$(echo "${failed_repos[*]}")
                  ^-- [SC2116](https://www.shellcheck.net/wiki/SC2116) (style): Useless echo? Instead of 'cmd $(echo foo)', just use 'cmd foo'.
 
[Line 123:](javascript:setPosition(123, 17))
for ORG_NAME in ${ORG_NAMES[@]}; do
                ^-- [SC2068](https://www.shellcheck.net/wiki/SC2068) (error): Double quote array expansions to avoid re-splitting elements.
 
[Line 141:](javascript:setPosition(141, 14))
    if [[ ! "${failed_repos}" ]]; then
             ^-- [SC2128](https://www.shellcheck.net/wiki/SC2128) (warning): Expanding an array without an index only gives the first element.
 
[Line 155:](javascript:setPosition(155, 36))
    git config --global user.email ${GITHUB_USER_EMAIL}
                                   ^-- [SC2086](https://www.shellcheck.net/wiki/SC2086) (info): Double quote to prevent globbing and word splitting.

Did you mean: ([apply this](javascript:applyFixIndex([14])), apply [all SC2086](javascript:applyFixCode(2086)))
    git config --global user.email "${GITHUB_USER_EMAIL}"
 
[Line 156:](javascript:setPosition(156, 50))
    git diff-index --quiet HEAD || git commit -m ${commit_message}
                                                 ^-- [SC2086](https://www.shellcheck.net/wiki/SC2086) (info): Double quote to prevent globbing and word splitting.

Did you mean: ([apply this](javascript:applyFixIndex([15])), apply [all SC2086](javascript:applyFixCode(2086)))
    git diff-index --quiet HEAD || git commit -m "${commit_message}"

[nedbat]

A few more opportunities to make this more uniform.