Lower Docker req to 19, make sure we test locally

Ref #15

``` $ docker --version
Docker version 19.03.11, build 42e35e6
```

But abra works. So I think 19 might be sufficient?

Also, wondering if we should add `DOCKER_CONTEXT=default` to that check,
to make sure we're not querying a remote server. (Semi-related question
- should we also check remote Docker versions?)

CHANGELOG.md

@@ -1,5 +1,25 @@
+> 🔥 🔥 🔥 Please note, while we are still in [public
+> alpha](https://docs.cloud.autonomic.zone/roadmap/), the `abra` release
+> versioning scheme is not following [semver](https://semver.org/) conventions
+> because we are still in the exploratory phases of building this tool. Please
+> read the changes before upgrading your `abra` installation as there are
+> **most likely** breaking changes coming each release. Sorry for any
+> inconvenience caused, we're working hard to make this tool stable. Semver
+> will be respected when we reach public beta. 🔥 🔥 🔥
+
 # abra x.x.x (UNRELEASED)
 
+- Add `--force` to the `deploy` command to allow overriding deployment logic ([#105](https://git.autonomic.zone/coop-cloud/abra/issues/105))
+- Handle undeployed apps in version summaries when deploying ([#104](https://git.autonomic.zone/coop-cloud/abra/issues/104))
+- Add `--force` to `undeploy` command ([e5e98d5](https://git.autonomic.zone/coop-cloud/abra/commit/e5e98d5))
+- Rename "app type" back to "stack" in the deployment overview ([54b6acc](https://git.autonomic.zone/coop-cloud/abra/commit/54b6acc))
+- Show context connection details on `abra server ls` ([#110](https://git.autonomic.zone/coop-cloud/abra/issues/110))
+- Allow to debug the SSH connection details on swarm init ([#109](https://git.autonomic.zone/coop-cloud/abra/issues/109))
+- Show correct status for apps deployed on servers with missing context ([#99](https://git.autonomic.zone/coop-cloud/abra/issues/99))
+- Search for subcommands in descending order of how many components there are ([#108](https://git.autonomic.zone/coop-cloud/abra/issues/108))
+- Add specific app version checking command (`abra app <app> version`) ([#108](https://git.autonomic.zone/coop-cloud/abra/issues/108))
+- Add docker version check (guestimating < v20 is a bad idea) ([#15](https://git.autonomic.zone/coop-cloud/abra/issues/15))
+
 # abra 0.6.0 (2021-03-17)
 
 - Show version and digest of app if labelled ([98e674b8e8](https://git.autonomic.zone/coop-cloud/abra/commit/98e674b8e83458a83dcbf331e8e34c7188559c4a))

README.md

@@ -11,6 +11,15 @@ The cooperative cloud utility belt 🎩🐇
 
 ## Change log
 
+> 🔥 🔥 🔥 Please note, while we are still in [public
+> alpha](https://docs.cloud.autonomic.zone/roadmap/), the `abra` release
+> versioning scheme is not following [semver](https://semver.org/) conventions
+> because we are still in the exploratory phases of building this tool. Please
+> read the changes before upgrading your `abra` installation as there are
+> **most likely** breaking changes coming each release. Sorry for any
+> inconvenience caused, we're working hard to make this tool stable. Semver
+> will be respected when we reach public beta. 🔥 🔥 🔥
+
 See [CHANGELOG.md](./CHANGELOG.md).
 
 ## Documentation
@@ -50,8 +59,11 @@ The command-line interface is generated via [docopt](http://docopt.org/). If you
 
 Please remember to update the [CHANGELOG](./CHANGELOG.md) when you make a change.
 
-To deploy a new version of the installer scripts:
+## Release
 
-```sh
-make release-installer
-```
+- Change the `x.x.x` header in [CHANGELOG.md](./CHANGELOG.md) to reflect new version and mark date
+- Update versions in [installer/installer](./installer/installer) and [abra](./abra)
+- `git commit` the above changes and then tag it with `git tag <your-new-version>`
+- Then `git push` and `git push --tags`
+- Deploy a new installer script `make release-installer`
+- Tell the world

abra

@@ -18,8 +18,9 @@ Usage:
   abra [options] app (list|ls) [--status] [--server=<server>] [--type=<type>]
   abra [options] app new [--server=<server>] [--domain=<domain>] [--app-name=<app_name>] [--pass] [--secrets] <type>
   abra [options] app <app> backup (<service>|--all)
-  abra [options] app <app> deploy [--update]
+  abra [options] app <app> deploy [--update] [--force]
   abra [options] app <app> check
+  abra [options] app <app> version
   abra [options] app <app> config
   abra [options] app <app> cp <src> <dst>
   abra [options] app <app> logs [<service>]
@@ -32,7 +33,7 @@ Usage:
   abra [options] app <app> secret generate (<secret> <version>|--all) [<cmd>] [--pass]
   abra [options] app <app> secret insert <secret> <version> <data> [--pass]
   abra [options] app <app> secret (rm|delete) (<secret>|--all) [--pass] [--force]
-  abra [options] app <app> undeploy
+  abra [options] app <app> undeploy [--force]
   abra [options] app <app> <command> [<args>...]
   abra [options] server add <host> [<user>] [<port>]
   abra [options] server new <provider>
@@ -157,86 +158,86 @@ eval "var_$1+=($value)"; else eval "var_$1=$value"; fi; return 0; fi; done
 return 1; }; stdout() { printf -- "cat <<'EOM'\n%s\nEOM\n" "$1"; }; stderr() {
 printf -- "cat <<'EOM' >&2\n%s\nEOM\n" "$1"; }; error() {
 [[ -n $1 ]] && stderr "$1"; stderr "$usage"; _return 1; }; _return() {
-printf -- "exit %d\n" "$1"; exit "$1"; }; set -e; trimmed_doc=${DOC:1:2017}
-usage=${DOC:40:1481}; digest=fd466
-shorts=(-e -U -d -v -C -s -h -b '' '' '' '' '' '' '' '' '' '' '' '' '' '')
-longs=(--env --skip-update --debug --verbose --skip-check --stack --help --branch --status --server --type --domain --app-name --pass --secrets --all --update --force --volumes --no-tty --user --dev)
-argcounts=(1 0 0 0 0 1 0 1 0 1 1 1 1 0 0 0 0 0 0 0 1 0); node_0(){ value __env 0
-}; node_1(){ switch __skip_update 1; }; node_2(){ switch __debug 2; }; node_3(){
-switch __verbose 3; }; node_4(){ switch __skip_check 4; }; node_5(){
-value __stack 5; }; node_6(){ switch __help 6; }; node_7(){ value __branch 7; }
-node_8(){ switch __status 8; }; node_9(){ value __server 9; }; node_10(){
-value __type 10; }; node_11(){ value __domain 11; }; node_12(){
-value __app_name 12; }; node_13(){ switch __pass 13; }; node_14(){
-switch __secrets 14; }; node_15(){ switch __all 15; }; node_16(){
-switch __update 16; }; node_17(){ switch __force 17; }; node_18(){
-switch __volumes 18; }; node_19(){ switch __no_tty 19; }; node_20(){
-value __user 20; }; node_21(){ switch __dev 21; }; node_22(){ value _type_ a; }
-node_23(){ value _app_ a; }; node_24(){ value _service_ a; }; node_25(){
-value _src_ a; }; node_26(){ value _dst_ a; }; node_27(){ value _backup_file_ a
-}; node_28(){ value _args_ a true; }; node_29(){ value _secret_ a; }; node_30(){
-value _version_ a; }; node_31(){ value _cmd_ a; }; node_32(){ value _data_ a; }
-node_33(){ value _command_ a; }; node_34(){ value _host_ a; }; node_35(){
-value _user_ a; }; node_36(){ value _port_ a; }; node_37(){ value _provider_ a
-}; node_38(){ value _subcommands_ a true; }; node_39(){ _command app; }
-node_40(){ _command list; }; node_41(){ _command ls; }; node_42(){ _command new
-}; node_43(){ _command backup; }; node_44(){ _command deploy; }; node_45(){
-_command check; }; node_46(){ _command config; }; node_47(){ _command cp; }
-node_48(){ _command logs; }; node_49(){ _command ps; }; node_50(){
-_command restore; }; node_51(){ _command rm; }; node_52(){ _command delete; }
-node_53(){ _command run; }; node_54(){ _command rollback; }; node_55(){
-_command secret; }; node_56(){ _command generate; }; node_57(){ _command insert
-}; node_58(){ _command undeploy; }; node_59(){ _command server; }; node_60(){
-_command add; }; node_61(){ _command init; }; node_62(){ _command apps; }
-node_63(){ _command upgrade; }; node_64(){ _command version; }; node_65(){
-_command help; }; node_66(){ optional 0 1 2 3 4 5 6 7; }; node_67(){ optional 66
-}; node_68(){ either 40 41; }; node_69(){ required 68; }; node_70(){ optional 8
-}; node_71(){ optional 9; }; node_72(){ optional 10; }; node_73(){
-required 67 39 69 70 71 72; }; node_74(){ optional 11; }; node_75(){ optional 12
-}; node_76(){ optional 13; }; node_77(){ optional 14; }; node_78(){
-required 67 39 42 71 74 75 76 77 22; }; node_79(){ either 24 15; }; node_80(){
-required 79; }; node_81(){ required 67 39 23 43 80; }; node_82(){ optional 16; }
-node_83(){ required 67 39 23 44 82; }; node_84(){ required 67 39 23 45; }
-node_85(){ required 67 39 23 46; }; node_86(){ required 67 39 23 47 25 26; }
-node_87(){ optional 24; }; node_88(){ required 67 39 23 48 87; }; node_89(){
-required 67 39 23 49; }; node_90(){ required 67 39 23 50 80; }; node_91(){
-either 51 52; }; node_92(){ required 91; }; node_93(){ optional 17; }
-node_94(){ optional 18; }; node_95(){ required 67 39 23 92 93 94 77; }
-node_96(){ optional 27; }; node_97(){ required 67 39 23 50 24 96; }; node_98(){
-optional 19; }; node_99(){ optional 20; }; node_100(){ oneormore 28; }
-node_101(){ required 67 39 23 53 98 99 24 100; }; node_102(){
-required 67 39 23 54 24; }; node_103(){ required 29 30; }; node_104(){
-either 103 15; }; node_105(){ required 104; }; node_106(){ optional 31; }
-node_107(){ required 67 39 23 55 56 105 106 76; }; node_108(){
-required 67 39 23 55 57 29 30 32 76; }; node_109(){ either 29 15; }; node_110(){
-required 109; }; node_111(){ required 67 39 23 55 92 110 76 93; }; node_112(){
-required 67 39 23 58; }; node_113(){ optional 100; }; node_114(){
-required 67 39 23 33 113; }; node_115(){ optional 35; }; node_116(){ optional 36
-}; node_117(){ required 67 59 60 34 115 116; }; node_118(){ required 67 59 42 37
-}; node_119(){ required 67 59 69; }; node_120(){ required 67 59 34 51; }
-node_121(){ required 67 59 34 61; }; node_122(){ required 67 59 34 62 70; }
-node_123(){ optional 21; }; node_124(){ required 67 63 123; }; node_125(){
-required 67 64; }; node_126(){ oneormore 38; }; node_127(){ optional 126; }
-node_128(){ required 67 65 127; }; node_129(){ required 67; }; node_130(){
-either 73 78 81 83 84 85 86 88 89 90 95 97 101 102 107 108 111 112 114 117 118 119 120 121 122 124 125 128 129
-}; node_131(){ required 130; }; cat <<<' docopt_exit() {
-[[ -n $1 ]] && printf "%s\n" "$1" >&2; printf "%s\n" "${DOC:40:1481}" >&2
-exit 1; }'; unset var___env var___skip_update var___debug var___verbose \
-var___skip_check var___stack var___help var___branch var___status var___server \
+printf -- "exit %d\n" "$1"; exit "$1"; }; set -e; trimmed_doc=${DOC:1:2072}
+usage=${DOC:40:1536}; digest=9142c
+shorts=(-U -v -s -h -C -b -d -e '' '' '' '' '' '' '' '' '' '' '' '' '' '')
+longs=(--skip-update --verbose --stack --help --skip-check --branch --debug --env --status --server --type --domain --app-name --pass --secrets --all --update --force --volumes --no-tty --user --dev)
+argcounts=(0 0 1 0 0 1 0 1 0 1 1 1 1 0 0 0 0 0 0 0 1 0); node_0(){
+switch __skip_update 0; }; node_1(){ switch __verbose 1; }; node_2(){
+value __stack 2; }; node_3(){ switch __help 3; }; node_4(){
+switch __skip_check 4; }; node_5(){ value __branch 5; }; node_6(){
+switch __debug 6; }; node_7(){ value __env 7; }; node_8(){ switch __status 8; }
+node_9(){ value __server 9; }; node_10(){ value __type 10; }; node_11(){
+value __domain 11; }; node_12(){ value __app_name 12; }; node_13(){
+switch __pass 13; }; node_14(){ switch __secrets 14; }; node_15(){
+switch __all 15; }; node_16(){ switch __update 16; }; node_17(){
+switch __force 17; }; node_18(){ switch __volumes 18; }; node_19(){
+switch __no_tty 19; }; node_20(){ value __user 20; }; node_21(){ switch __dev 21
+}; node_22(){ value _type_ a; }; node_23(){ value _app_ a; }; node_24(){
+value _service_ a; }; node_25(){ value _src_ a; }; node_26(){ value _dst_ a; }
+node_27(){ value _backup_file_ a; }; node_28(){ value _args_ a true; }
+node_29(){ value _secret_ a; }; node_30(){ value _version_ a; }; node_31(){
+value _cmd_ a; }; node_32(){ value _data_ a; }; node_33(){ value _command_ a; }
+node_34(){ value _host_ a; }; node_35(){ value _user_ a; }; node_36(){
+value _port_ a; }; node_37(){ value _provider_ a; }; node_38(){
+value _subcommands_ a true; }; node_39(){ _command app; }; node_40(){
+_command list; }; node_41(){ _command ls; }; node_42(){ _command new; }
+node_43(){ _command backup; }; node_44(){ _command deploy; }; node_45(){
+_command check; }; node_46(){ _command version; }; node_47(){ _command config; }
+node_48(){ _command cp; }; node_49(){ _command logs; }; node_50(){ _command ps
+}; node_51(){ _command restore; }; node_52(){ _command rm; }; node_53(){
+_command delete; }; node_54(){ _command run; }; node_55(){ _command rollback; }
+node_56(){ _command secret; }; node_57(){ _command generate; }; node_58(){
+_command insert; }; node_59(){ _command undeploy; }; node_60(){ _command server
+}; node_61(){ _command add; }; node_62(){ _command init; }; node_63(){
+_command apps; }; node_64(){ _command upgrade; }; node_65(){ _command help; }
+node_66(){ optional 0 1 2 3 4 5 6 7; }; node_67(){ optional 66; }; node_68(){
+either 40 41; }; node_69(){ required 68; }; node_70(){ optional 8; }; node_71(){
+optional 9; }; node_72(){ optional 10; }; node_73(){ required 67 39 69 70 71 72
+}; node_74(){ optional 11; }; node_75(){ optional 12; }; node_76(){ optional 13
+}; node_77(){ optional 14; }; node_78(){ required 67 39 42 71 74 75 76 77 22; }
+node_79(){ either 24 15; }; node_80(){ required 79; }; node_81(){
+required 67 39 23 43 80; }; node_82(){ optional 16; }; node_83(){ optional 17; }
+node_84(){ required 67 39 23 44 82 83; }; node_85(){ required 67 39 23 45; }
+node_86(){ required 67 39 23 46; }; node_87(){ required 67 39 23 47; }
+node_88(){ required 67 39 23 48 25 26; }; node_89(){ optional 24; }; node_90(){
+required 67 39 23 49 89; }; node_91(){ required 67 39 23 50; }; node_92(){
+required 67 39 23 51 80; }; node_93(){ either 52 53; }; node_94(){ required 93
+}; node_95(){ optional 18; }; node_96(){ required 67 39 23 94 83 95 77; }
+node_97(){ optional 27; }; node_98(){ required 67 39 23 51 24 97; }; node_99(){
+optional 19; }; node_100(){ optional 20; }; node_101(){ oneormore 28; }
+node_102(){ required 67 39 23 54 99 100 24 101; }; node_103(){
+required 67 39 23 55 24; }; node_104(){ required 29 30; }; node_105(){
+either 104 15; }; node_106(){ required 105; }; node_107(){ optional 31; }
+node_108(){ required 67 39 23 56 57 106 107 76; }; node_109(){
+required 67 39 23 56 58 29 30 32 76; }; node_110(){ either 29 15; }; node_111(){
+required 110; }; node_112(){ required 67 39 23 56 94 111 76 83; }; node_113(){
+required 67 39 23 59 83; }; node_114(){ optional 101; }; node_115(){
+required 67 39 23 33 114; }; node_116(){ optional 35; }; node_117(){ optional 36
+}; node_118(){ required 67 60 61 34 116 117; }; node_119(){ required 67 60 42 37
+}; node_120(){ required 67 60 69; }; node_121(){ required 67 60 34 52; }
+node_122(){ required 67 60 34 62; }; node_123(){ required 67 60 34 63 70; }
+node_124(){ optional 21; }; node_125(){ required 67 64 124; }; node_126(){
+required 67 46; }; node_127(){ oneormore 38; }; node_128(){ optional 127; }
+node_129(){ required 67 65 128; }; node_130(){ required 67; }; node_131(){
+either 73 78 81 84 85 86 87 88 90 91 92 96 98 102 103 108 109 112 113 115 118 119 120 121 122 123 125 126 129 130
+}; node_132(){ required 131; }; cat <<<' docopt_exit() {
+[[ -n $1 ]] && printf "%s\n" "$1" >&2; printf "%s\n" "${DOC:40:1536}" >&2
+exit 1; }'; unset var___skip_update var___verbose var___stack var___help \
+var___skip_check var___branch var___debug var___env var___status var___server \
 var___type var___domain var___app_name var___pass var___secrets var___all \
 var___update var___force var___volumes var___no_tty var___user var___dev \
 var__type_ var__app_ var__service_ var__src_ var__dst_ var__backup_file_ \
 var__args_ var__secret_ var__version_ var__cmd_ var__data_ var__command_ \
 var__host_ var__user_ var__port_ var__provider_ var__subcommands_ var_app \
-var_list var_ls var_new var_backup var_deploy var_check var_config var_cp \
-var_logs var_ps var_restore var_rm var_delete var_run var_rollback var_secret \
-var_generate var_insert var_undeploy var_server var_add var_init var_apps \
-var_upgrade var_version var_help; parse 131 "$@"
-local prefix=${DOCOPT_PREFIX:-''}; unset "${prefix}__env" \
-"${prefix}__skip_update" "${prefix}__debug" "${prefix}__verbose" \
-"${prefix}__skip_check" "${prefix}__stack" "${prefix}__help" \
-"${prefix}__branch" "${prefix}__status" "${prefix}__server" "${prefix}__type" \
-"${prefix}__domain" "${prefix}__app_name" "${prefix}__pass" \
+var_list var_ls var_new var_backup var_deploy var_check var_version var_config \
+var_cp var_logs var_ps var_restore var_rm var_delete var_run var_rollback \
+var_secret var_generate var_insert var_undeploy var_server var_add var_init \
+var_apps var_upgrade var_help; parse 132 "$@"; local prefix=${DOCOPT_PREFIX:-''}
+unset "${prefix}__skip_update" "${prefix}__verbose" "${prefix}__stack" \
+"${prefix}__help" "${prefix}__skip_check" "${prefix}__branch" \
+"${prefix}__debug" "${prefix}__env" "${prefix}__status" "${prefix}__server" \
+"${prefix}__type" "${prefix}__domain" "${prefix}__app_name" "${prefix}__pass" \
 "${prefix}__secrets" "${prefix}__all" "${prefix}__update" "${prefix}__force" \
 "${prefix}__volumes" "${prefix}__no_tty" "${prefix}__user" "${prefix}__dev" \
 "${prefix}_type_" "${prefix}_app_" "${prefix}_service_" "${prefix}_src_" \
@@ -245,19 +246,19 @@ local prefix=${DOCOPT_PREFIX:-''}; unset "${prefix}__env" \
 "${prefix}_command_" "${prefix}_host_" "${prefix}_user_" "${prefix}_port_" \
 "${prefix}_provider_" "${prefix}_subcommands_" "${prefix}app" "${prefix}list" \
 "${prefix}ls" "${prefix}new" "${prefix}backup" "${prefix}deploy" \
-"${prefix}check" "${prefix}config" "${prefix}cp" "${prefix}logs" "${prefix}ps" \
-"${prefix}restore" "${prefix}rm" "${prefix}delete" "${prefix}run" \
-"${prefix}rollback" "${prefix}secret" "${prefix}generate" "${prefix}insert" \
-"${prefix}undeploy" "${prefix}server" "${prefix}add" "${prefix}init" \
-"${prefix}apps" "${prefix}upgrade" "${prefix}version" "${prefix}help"
-eval "${prefix}"'__env=${var___env:-}'
-eval "${prefix}"'__skip_update=${var___skip_update:-false}'
-eval "${prefix}"'__debug=${var___debug:-false}'
+"${prefix}check" "${prefix}version" "${prefix}config" "${prefix}cp" \
+"${prefix}logs" "${prefix}ps" "${prefix}restore" "${prefix}rm" \
+"${prefix}delete" "${prefix}run" "${prefix}rollback" "${prefix}secret" \
+"${prefix}generate" "${prefix}insert" "${prefix}undeploy" "${prefix}server" \
+"${prefix}add" "${prefix}init" "${prefix}apps" "${prefix}upgrade" \
+"${prefix}help"; eval "${prefix}"'__skip_update=${var___skip_update:-false}'
 eval "${prefix}"'__verbose=${var___verbose:-false}'
-eval "${prefix}"'__skip_check=${var___skip_check:-false}'
 eval "${prefix}"'__stack=${var___stack:-}'
 eval "${prefix}"'__help=${var___help:-false}'
+eval "${prefix}"'__skip_check=${var___skip_check:-false}'
 eval "${prefix}"'__branch=${var___branch:-}'
+eval "${prefix}"'__debug=${var___debug:-false}'
+eval "${prefix}"'__env=${var___env:-}'
 eval "${prefix}"'__status=${var___status:-false}'
 eval "${prefix}"'__server=${var___server:-}'
 eval "${prefix}"'__type=${var___type:-}'
@@ -294,6 +295,7 @@ eval "${prefix}"'new=${var_new:-false}'
 eval "${prefix}"'backup=${var_backup:-false}'
 eval "${prefix}"'deploy=${var_deploy:-false}'
 eval "${prefix}"'check=${var_check:-false}'
+eval "${prefix}"'version=${var_version:-false}'
 eval "${prefix}"'config=${var_config:-false}'
 eval "${prefix}"'cp=${var_cp:-false}'; eval "${prefix}"'logs=${var_logs:-false}'
 eval "${prefix}"'ps=${var_ps:-false}'
@@ -311,12 +313,11 @@ eval "${prefix}"'add=${var_add:-false}'
 eval "${prefix}"'init=${var_init:-false}'
 eval "${prefix}"'apps=${var_apps:-false}'
 eval "${prefix}"'upgrade=${var_upgrade:-false}'
-eval "${prefix}"'version=${var_version:-false}'
 eval "${prefix}"'help=${var_help:-false}'; local docopt_i=1
 [[ $BASH_VERSION =~ ^4.3 ]] && docopt_i=2; for ((;docopt_i>0;docopt_i--)); do
-declare -p "${prefix}__env" "${prefix}__skip_update" "${prefix}__debug" \
-"${prefix}__verbose" "${prefix}__skip_check" "${prefix}__stack" \
-"${prefix}__help" "${prefix}__branch" "${prefix}__status" "${prefix}__server" \
+declare -p "${prefix}__skip_update" "${prefix}__verbose" "${prefix}__stack" \
+"${prefix}__help" "${prefix}__skip_check" "${prefix}__branch" \
+"${prefix}__debug" "${prefix}__env" "${prefix}__status" "${prefix}__server" \
 "${prefix}__type" "${prefix}__domain" "${prefix}__app_name" "${prefix}__pass" \
 "${prefix}__secrets" "${prefix}__all" "${prefix}__update" "${prefix}__force" \
 "${prefix}__volumes" "${prefix}__no_tty" "${prefix}__user" "${prefix}__dev" \
@@ -326,11 +327,12 @@ declare -p "${prefix}__env" "${prefix}__skip_update" "${prefix}__debug" \
 "${prefix}_command_" "${prefix}_host_" "${prefix}_user_" "${prefix}_port_" \
 "${prefix}_provider_" "${prefix}_subcommands_" "${prefix}app" "${prefix}list" \
 "${prefix}ls" "${prefix}new" "${prefix}backup" "${prefix}deploy" \
-"${prefix}check" "${prefix}config" "${prefix}cp" "${prefix}logs" "${prefix}ps" \
-"${prefix}restore" "${prefix}rm" "${prefix}delete" "${prefix}run" \
-"${prefix}rollback" "${prefix}secret" "${prefix}generate" "${prefix}insert" \
-"${prefix}undeploy" "${prefix}server" "${prefix}add" "${prefix}init" \
-"${prefix}apps" "${prefix}upgrade" "${prefix}version" "${prefix}help"; done; }
+"${prefix}check" "${prefix}version" "${prefix}config" "${prefix}cp" \
+"${prefix}logs" "${prefix}ps" "${prefix}restore" "${prefix}rm" \
+"${prefix}delete" "${prefix}run" "${prefix}rollback" "${prefix}secret" \
+"${prefix}generate" "${prefix}insert" "${prefix}undeploy" "${prefix}server" \
+"${prefix}add" "${prefix}init" "${prefix}apps" "${prefix}upgrade" \
+"${prefix}help"; done; }
 # docopt parser above, complete command for generating this parser is `docopt.sh abra`
 
 PROGRAM_NAME=$(basename "$0")
@@ -399,16 +401,18 @@ require_bash_4() {
   fi
 }
 
-require_pwqgen() {
-  if ! type pwqgen > /dev/null 2>&1; then
-    error "pwqgen program is not installed"
+require_binary() {
+  if ! type "$1" > /dev/null 2>&1; then
+    error "'$1' program is not installed"
   fi
 }
 
+require_pwqgen() {
+  require_binary pwqgen
+}
+
 require_wget() {
-  if ! type wget > /dev/null 2>&1; then
-    error "wget program is not installed"
-  fi
+  require_binary wget
 }
 
 require_abra_dir() {
@@ -474,6 +478,15 @@ require_yq() {
   esac
 }
 
+require_docker_version (){
+  major_version=$(DOCKER_CONTEXT=default docker version --format "{{.Server.Version}}" | cut -d'.' -f1)
+
+  if [[ "$major_version" -lt 19 ]]; then
+    error "This tool requires Docker v20 or greater. Please upgrade your Docker installation"
+    exit 1
+  fi
+}
+
 # FIXME 3wc: update or remove
 if [ -z "$ABRA_ENV" ] && [ -f .env ] && type direnv > /dev/null 2>&1 && ! direnv status | grep -q 'Found RC allowed true'; then
   error "direnv is blocked, run direnv allow"
@@ -503,11 +516,17 @@ output_version_summary() {
   echo "  Versions:"
 
   CONSENT_TO_UPDATE=$abra___update
+  FORCE_DEPLOY=$abra___force
 
   local -a IS_AN_UPDATE="false"
   local -a UNABLE_TO_DETECT="false"
+  local -a UNDEPLOYED_STATE="false"
   local -a CHECKED_SERVICES # array
 
+  if ! docker stack ls --format "{{ .Name }}" | grep -q "$STACK_NAME"; then
+    UNDEPLOYED_STATE="true"
+  fi
+
   IFS=':' read -ra COMPOSE_FILES <<< "$COMPOSE_FILE"
   for COMPOSE in "${COMPOSE_FILES[@]}"; do
     SERVICES=$($YQ e '.services | keys | .[]' "${APP_DIR}/${COMPOSE}")
@@ -540,20 +559,29 @@ output_version_summary() {
           echo "      to de deployed: $(tput setaf 1)$app_version ($app_digest)$(tput sgr0)"
         fi
       else
-        warning "Unable to detect deployed version of ${STACK_NAME}_${SERVICE}, please proceed with caution"
-        UNABLE_TO_DETECT="true"
+        if [[ $UNDEPLOYED_STATE == "true" ]]; then
+          image=$($YQ e ".services.${SERVICE}.image" "${APP_DIR}/${COMPOSE}" | cut -d':' -f1)
+          echo "    ${STACK_NAME}_${SERVICE} (${image}):"
+          echo "      undeployed!"
+        else
+          warning "Unable to detect deployed version of ${STACK_NAME}_${SERVICE}"
+          UNABLE_TO_DETECT="true"
+        fi
       fi
       CHECKED_SERVICES+=("$SERVICE")
     done
   done
 
-  if [[ $IS_AN_UPDATE == "true" ]]; then
+  if [[ -n "$IS_VERSION_CHECK" ]] && [[ "$IS_VERSION_CHECK" == "true" ]]; then
+    debug "Detected version check (without deploy), bailing out..."
+    exit 0
+  fi
+
+  if [[ $IS_AN_UPDATE == "true" ]] && [[ $FORCE_DEPLOY != "true" ]]; then
     require_consent_for_update
   else
-    # Note(decentral1se): in the cases where we couldn't detect a version we
-    # shouldn't block an update and the end-user can still make progress
-    if [[ ! $UNABLE_TO_DETECT == "true" ]]; then
-      success "Nothing to deploy, you're on latest"
+    if [[ ! $UNABLE_TO_DETECT == "true" ]] && [[ $FORCE_DEPLOY != "true" ]] && [[ ! $UNDEPLOYED_STATE == "true" ]]; then
+      success "Nothing to deploy, you're on latest (use --force to re-deploy anyway)"
       exit 0
     fi
   fi
@@ -597,7 +625,9 @@ load_instance() {
   IFS='/' read -r -a PARTS <<< "$ENV_FILE"
 
   SERVER="${PARTS[-2]}"
+
   export STACK_NAME="${APP//./_}"
+  debug "Using ${STACK_NAME} as the STACK_NAME var"
 }
 
 load_instance_env() {
@@ -743,12 +773,13 @@ sub_app_list (){
     fi
 
     local -a DEPLOYED_APPS  # array
+    local -a CHECKED_SERVERS  # array
 
     warning "Loading status from ${#SERVERS[@]} server(s), patience advised.."
 
     for SERVER in "${SERVERS[@]}"; do
       SERVER="${SERVER##*/}"  # basename
-      mapfile -t SERVER_APPS < <(DOCKER_CONTEXT="$SERVER" docker stack ls --format '{{ .Name }}')
+      mapfile -t SERVER_APPS < <(DOCKER_CONTEXT="$SERVER" docker stack ls --format '{{ .Name }}' 2>/dev/null)
       # add $SERVER~ to the start of each DEPLOYED_APPS
       DEPLOYED_APPS+=("${SERVER_APPS[@]/#/$SERVER~}")
     done
@@ -788,6 +819,16 @@ sub_app_list (){
     fi
     if [ -n "$STATUS" ]; then
       APP_STATUS=$( printf '%s\n' "${DEPLOYED_APPS[@]}" | grep -qP "^${SERVER}~${APP_STACK_NAME}$" && echo "deployed" || echo "inactive")
+      if [[ "$APP_STATUS" == "inactive" ]] ; then
+        if [[ ${CHECKED_SERVERS[*]} =~ ${SERVER} ]]; then
+          APP_STATUS="unknown"
+        else
+          if ! docker context inspect "$SERVER" > /dev/null 2>&1; then
+            APP_STATUS="unknown"
+          fi
+          CHECKED_SERVERS+=("$SERVER")
+        fi
+      fi
     fi
     printf "  %s\t%s\t%s%s\n" "$DOMAIN" "$TYPE" "$SERVER" "${STATUS:+	}${APP_STATUS}"
   done | column -s'	' -t
@@ -890,10 +931,10 @@ sub_app_new (){
     auto_gen_secrets
   fi
 
-  echo "$(tput setaf 4)Your new '$TYPE' is ready for action:$(tput sgr0)"
-  echo "  $(tput setaf 3)Customise the configuration:"
+  echo "$(tput setaf 4)Your new '$TYPE' has been created!$(tput sgr0)"
+  echo "  $(tput setaf 3)Please customise the configuration defaults:"
   echo "    abra app $APP_NAME config$(tput sgr0)"
-  echo "  $(tput setaf 2)Deploy it:"
+  echo "  $(tput setaf 2)Then you can deploy it:"
   echo "    abra app $APP_NAME deploy$(tput sgr0)"
 }
 
@@ -1012,6 +1053,8 @@ sub_app_deploy (){
   require_yq
   require_app_latest "$TYPE"
 
+  FORCE_DEPLOY=$abra___force
+
   echo "Deployment overview:"
   echo "  Server: $(tput setaf 4)${SERVER}$(tput sgr0)"
 
@@ -1030,11 +1073,13 @@ sub_app_deploy (){
     echo "  Domain: $(tput setaf 2)${DOMAIN}$(tput sgr0)"
   fi
 
-  echo "  App type: $(tput setaf 3)${STACK_NAME}$(tput sgr0)"
+  echo "  Stack: $(tput setaf 3)${STACK_NAME}$(tput sgr0)"
 
   output_version_summary
 
-  prompt_confirm
+  if [[ $FORCE_DEPLOY != "true" ]]; then
+    prompt_confirm
+  fi
 
   APP=$(basename "$APP_DIR")
 
@@ -1065,8 +1110,13 @@ POWERED BY
 }
 
 sub_app_undeploy (){
+  FORCE_UNDEPLOY=$abra___force
+
   warning "About to un-deploy $STACK_NAME from $SERVER"
-  prompt_confirm
+
+  if [[ $FORCE_UNDEPLOY != "true" ]]; then
+    prompt_confirm
+  fi
 
   docker stack rm "$STACK_NAME"
 }
@@ -1107,6 +1157,22 @@ sub_app_config (){
   $EDITOR "$ENV_FILE"
 }
 
+###### .. app version
+help_app_version (){
+  echo "abra [options] app <app> version
+
+Show versions of the app that are currently deployed"
+}
+
+sub_app_version (){
+  require_yq
+
+  IS_VERSION_CHECK="true"
+
+  echo "Version overview:"
+  output_version_summary
+}
+
 ###### .. app check
 help_app_check (){
   echo "abra [options] app <app> check
@@ -1333,7 +1399,7 @@ sub_app_secret_generate(){
     PWGEN="${abra__cmd_:-pwqgen}"
   fi
 
-  echo "SECRET: $SECRET, VERSION $VERSION, PW $PW, ALL $abra___all"
+  debug "SECRET: $SECRET, VERSION $VERSION, PW $PWGEN, ALL $abra___all"
 
   if [ -z "$SECRET" ] || [ -z "$VERSION" ] && [ "$abra___all" == "false" ]; then
     error "Required arguments missing"
@@ -1544,10 +1610,23 @@ List locally-defined servers."
 
 sub_server_list() {
   get_servers
+
+  warning "Loading status from ${#SERVERS[@]} server(s), patience advised.."
   printf "%s servers:\n\n" "${#SERVERS[@]}"
+
+  local -a idx=0
   for SERVER in "${SERVERS[@]}"; do
-    echo "  ${SERVER##*/}"
-  done
+    if [[ "$idx" == 0 ]]; then
+      printf "  NAME\tCONNECTION\n"
+      printf "  --\t--\t\n"
+    fi
+
+    name="${SERVER##*/}"
+    host=$(docker context inspect "$name" -f "{{.Endpoints.docker.Host}}" 2>/dev/null)
+    printf "  %s\t%s\n" "$name" "${host:-UNKNOWN}"
+
+    idx+=1
+  done | column -s'	' -t
 }
 
 ###### .. server init
@@ -1569,11 +1648,16 @@ sub_server_init() {
 
   load_context
 
-  # Note(decentral1se): it sucks to use Google DNS but seems like a reliable method
+  # Note(decentral1se): it sucks to use Google DNS but it seems like a reliable method
   #                     for determining the default IPv4 address especially nowadays
   #                     when there are often multiple internal addresses assigned to eth0
   default_ipv4="$(ip route get 8.8.8.8 | head -1 | awk '{print $7}')"
 
+  if [ "$abra___debug" = "true" ]; then
+    DOCKER_ENDPOINT=$(docker context inspect "$DOCKER_CONTEXT" -f "{{.Endpoints.docker.Host}}" 2>/dev/null)
+    debug "Connecting to $DOCKER_CONTEXT via SSH ($DOCKER_ENDPOINT)"
+  fi
+
   docker swarm init --advertise-addr "$default_ipv4" || true
   docker network create --driver=overlay proxy --scope swarm || true
 }
@@ -1774,6 +1858,7 @@ sub_network() {
 
 abra() {
   require_bash_4
+  require_docker_version
 
   # TODO (3wc): we either need to do this, or add 'shellcheck disable' all over
   # the place to handle the dynamically-defined vars
@@ -1816,8 +1901,11 @@ abra() {
   load_abra_sh
 
   # Search for sub_* functions, and check if any of them matches enabled
-  # arguments (i.e. is a command and is specified)
-  for SUBCOMMAND in $(declare -Ff | grep 'sub_' | cut -d' ' -f3 | sort -r); do
+  # arguments (i.e. is a command and is specified). The `awk / sort` sorts by
+  # the number of occurrences of '_' in the function name, to ensure that
+  # `abra app <app> version` will be matched before `abra version`.
+  SUBCOMMANDS=$(declare -Ff | grep 'sub_' | cut -d' ' -f3 | awk '{ print gsub("_","&"), $0 }' | sort -n -r | cut -d" " -f2-)
+  for SUBCOMMAND in $SUBCOMMANDS; do
     IFS='_' read -r -a PARTS <<< "$SUBCOMMAND"
     for PART in "${PARTS[@]:1}"; do
       # TODO 3wc: probably a better way to check if a variable is defined..