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Clarify stance on GPLv2+ vs GPLv3+
[code/vcsh.git] / vcsh
diff --git a/vcsh b/vcsh
index eaa8612c0e4af7040de7ff9165cc791e99122fc2..ce8d385d4fe0a0b550797adfecc43a40e6af64bb 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -1,8 +1,24 @@
 #!/bin/sh
 
 #!/bin/sh
 
-[ -n "$VCSH_DEBUG" ]      && set -x
-[ -z "$XDG_CONFIG_HOME" ] && XDG_CONFIG_HOME="$HOME/.config"
-[ -z "$VCSH_BASE" ]       && VCSH_BASE="$XDG_CONFIG_HOME/vcsh/repo.d"
+# This program is licensed under the GNU GPL version 2 or later.
+# (c) Richard "RichiH" Hartmann <richih.mailinglist@gmail.com>, 2011-2012
+# For details, see LICENSE. To submit patches, you have to agree to
+# license your code under the GNU GPL version 2 or later.
+
+# While the following is not legally binding, the author would like to
+# explain the choice of GPLv2+ over GPLv3+.
+# The author prefers GPLv3+ over GPLv2+ but feels it's better to maintain
+# full compability with git. In case git ever changes its licensing terms,
+# this software will most likely follow suit.
+
+[ -n "$VCSH_DEBUG" ]                  && set -vx
+[ -z "$XDG_CONFIG_HOME" ]             && XDG_CONFIG_HOME="$HOME/.config"
+[ -r "$XDG_CONFIG_HOME/vcsh/config" ] && . "$XDG_CONFIG_HOME/vcsh/config"
+[ -n "$VCSH_DEBUG" ]                  && set -vx
+[ -z "$VCSH_REPO_D" ]                 && VCSH_REPO_D="$XDG_CONFIG_HOME/vcsh/repo.d"
+[ -z "$VCSH_HOOK_D" ]                 && VCSH_HOOK_D="$XDG_CONFIG_HOME/vcsh/hooks-enabled"
+[ -z "$VCSH_BASE" ]                   && VCSH_BASE="$HOME"
+[ -z "$VCSH_GITIGNORE" ]              && VCSH_GITIGNORE='exact'
 
 SELF=$(basename $0)
 
 
 SELF=$(basename $0)
 
@@ -11,22 +27,25 @@ help() {
 
    clone <remote> \\
          [<repo>]       Clone from an existing repository
 
    clone <remote> \\
          [<repo>]       Clone from an existing repository
-   help                 Display this help text
    delete               Delete an existing repository
    delete               Delete an existing repository
-   enter                Enter repository; spawn new $SHELL
+   enter                Enter repository; spawn new instance of \$SHELL
+   help                 Display this help text
    init <repo>          Initialize a new repository
    list                 List all repositories
    init <repo>          Initialize a new repository
    list                 List all repositories
+   list-tracked         List all files tracked by vcsh
+   list-tracked-by \\
+        <repo>          List files tracked by a repository
    rename <repo> \\
           <newname>     Rename repository
    run <repo> \\
        <command>        Use this repository
    rename <repo> \\
           <newname>     Rename repository
    run <repo> \\
        <command>        Use this repository
-
-   seed-gitignore \\
-   <repo>               Seed .gitignore.d/<repo> from git ls-files
    setup                Set up repository with recommended settings
    setup                Set up repository with recommended settings
+   which <substring>    Find substring in name of any tracked file
+   write-gitignore \\
+   <repo>               Write .gitignore.d/<repo> via git ls-files
 
 
-   <repo> <git command> Special command that allows you to run git commands
-                        directly without having to type so much ;)" >&2
+   <repo> <git command> Shortcut to run git commands directly
+   <repo>               Shortcut to enter repository" >&2
 }
 
 debug() {
 }
 
 debug() {
@@ -55,6 +74,10 @@ clone() {
        git remote add origin "$GIT_REMOTE"
        git config branch.master.remote origin
        git config branch.master.merge  refs/heads/master
        git remote add origin "$GIT_REMOTE"
        git config branch.master.remote origin
        git config branch.master.merge  refs/heads/master
+       if [ $(git ls-remote origin master 2> /dev/null | wc -l ) -lt 1 ]; then
+               info "remote is empty, not merging anything"
+               exit
+       fi
        git fetch
        for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
                [ -e "$object" ] &&
        git fetch
        for object in $(git ls-tree -r origin/master | awk '{print $4}'); do
                [ -e "$object" ] &&
@@ -68,7 +91,7 @@ clone() {
 }
 
 delete() {
 }
 
 delete() {
-       cd "$HOME" || fatal "could not enter '$HOME'" 11
+       cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
        use
        info "This operation WILL DETROY DATA!"
        files=$(git ls-files)
        use
        info "This operation WILL DETROY DATA!"
        files=$(git ls-files)
@@ -77,27 +100,37 @@ delete() {
 $files
 
 AGAIN, THIS WILL DELETE YOUR DATA!
 $files
 
 AGAIN, THIS WILL DELETE YOUR DATA!
-To continue, type \"Yes, do as I say\""
+To continue, type 'Yes, do as I say'"
        read answer
        read answer
-       [ "x$answer" = "xYes, do as I say" ] || exit 16
+       [ "x$answer" = 'xYes, do as I say' ] || exit 16
        for file in $files; do
                rm -f $file || info "could not delete '$file', continuing with deletion"
        done
        for file in $files; do
                rm -f $file || info "could not delete '$file', continuing with deletion"
        done
-       rmdir "$GIT_DIR" || error "could not delete '$GIT_DIR'"
+       rm -r "$GIT_DIR" || error "could not delete '$GIT_DIR'"
 }
 
 enter() {
 }
 
 enter() {
+       hook pre-enter
        use
        $SHELL
        use
        $SHELL
+       hook post-enter
 }
 
 git_dir_exists() {
        [ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
 }
 
 }
 
 git_dir_exists() {
        [ -d "$GIT_DIR" ] || fatal "no repository found for '$VCSH_REPO_NAME'" 12
 }
 
+hook() {
+       for hook in $VCSH_HOOK_D/$1* $VCSH_HOOK_D/$VCSH_REPO_NAME.$1*; do
+               [ -x "$hook" ] || continue
+               info "executing '$hook'"
+               "$hook"
+       done
+}
+
 init() {
        [ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
 init() {
        [ ! -e "$GIT_DIR" ] || fatal "'$GIT_DIR' exists" 10
-       export GIT_WORK_TREE="$HOME"
+       export GIT_WORK_TREE="$VCSH_BASE"
        mkdir -p "$GIT_WORK_TREE" || fatal "could not create '$GIT_WORK_TREE'" 50
        cd "$GIT_WORK_TREE" || fatal "could not enter '$GIT_WORK_TREE'" 11
        git init
        mkdir -p "$GIT_WORK_TREE" || fatal "could not create '$GIT_WORK_TREE'" 50
        cd "$GIT_WORK_TREE" || fatal "could not enter '$GIT_WORK_TREE'" 11
        git init
@@ -105,22 +138,26 @@ init() {
 }
 
 list() {
 }
 
 list() {
-       for i in "$VCSH_BASE"/*.git; do
-               echo $(basename "$i" .git)
+       for repo in "$VCSH_REPO_D"/*.git; do
+               [ -r "$repo" ] && echo $(basename "$repo" .git)
        done
 }
 
        done
 }
 
-#get_files() {
-#      return $(git ls-files)
-#}
-#
-#list_tracked_all() {
-#      use
-#      for repo in $(list); do
-#              files="$files $(get_files $repo)"
-#      done
-#      echo $files | sort -u
-#}
+get_files() {
+       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+       git ls-files
+}
+
+list_tracked() {
+       for VCSH_REPO_NAME in $(list); do
+               get_files
+       done | sort -u
+}
+
+list_tracked_by() {
+       use
+       git ls-files | sort -u
+}
 
 rename() {
        git_dir_exists
 
 rename() {
        git_dir_exists
@@ -130,13 +167,39 @@ rename() {
 }
 
 run() {
 }
 
 run() {
+       hook pre-run
        use
        $VCSH_EXTERNAL_COMMAND
        use
        $VCSH_EXTERNAL_COMMAND
+       hook post-run
 }
 
 }
 
-seed_gitignore() {
+setup() {
+       hook pre-setup
        use
        use
-       cd "$HOME" || fatal "could not enter '$HOME'" 11
+       git config core.worktree     "$GIT_WORK_TREE"
+       git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
+       git config vcsh.vcsh         'true'
+       [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME"
+       hook post-setup
+}
+
+use() {
+       git_dir_exists
+       export GIT_WORK_TREE="$(git config --get core.worktree)"
+       export VCSH_DIRECTORY="$VCSH_REPO_NAME"
+}
+
+which() {
+       for VCSH_REPO_NAME in $(list); do
+               for VCSH_FILE in $(get_files); do
+                       echo $VCSH_FILE | grep -q "$VCSH_COMMAND_PARAMETER" && echo "$VCSH_REPO_NAME: $VCSH_FILE"
+               done
+       done | sort -u
+}
+
+write_gitignore() {
+       use
+       cd "$VCSH_BASE" || fatal "could not enter '$VCSH_BASE'" 11
        gitignores=$(for file in $(git ls-files); do
                while true; do
                        echo $file; new="${file%/*}"
        gitignores=$(for file in $(git ls-files); do
                while true; do
                        echo $file; new="${file%/*}"
@@ -148,82 +211,85 @@ seed_gitignore() {
        echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
        for gitignore in $gitignores; do
                echo "$gitignore" | sed 's/^/!/' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
        echo '*' > "$tempfile" || fatal "could not write to '$tempfile'" 57
        for gitignore in $gitignores; do
                echo "$gitignore" | sed 's/^/!/' >> "$tempfile" || fatal "could not write to '$tempfile'" 57
-               [ -d "$gitignore" ] && { echo "$gitignore/*" | sed 's/^/!/' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
+               if [ x$VCSH_GITIGNORE = x'recursive' ] && [ -d "$gitignore" ]; then
+                       { echo "$gitignore/*" | sed 's/^/!/' >> "$tempfile" || fatal "could not write to '$tempfile'" 57; }
+               fi
        done
        done
-       if diff -N "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
+       if diff -N "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" > /dev/null; then
                rm -f "$tempfile" || error "could not delete '$tempfile'"
                exit
        fi
                rm -f "$tempfile" || error "could not delete '$tempfile'"
                exit
        fi
-       if [ -e "$HOME/.gitignore.d/$VCSH_REPO_NAME" ]; then
-               info "'$HOME/.gitignore.d/$VCSH_REPO_NAME' differs from new data, moving it to '$HOME/.gitignore.d/$VCSH_REPO_NAME.bak'"
-               mv -f "$HOME/.gitignore.d/$VCSH_REPO_NAME" "$HOME/.gitignore.d/$VCSH_REPO_NAME.bak" ||
-                       fatal "could not move '$HOME/.gitignore.d/$VCSH_REPO_NAME' to '$HOME/.gitignore.d/$VCSH_REPO_NAME.bak'" 53
+       if [ -e "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ]; then
+               info "'$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' differs from new data, moving it to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'"
+               mv -f "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak" ||
+                       fatal "could not move '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME.bak'" 53
        fi
        fi
-       mv -f "$tempfile" "$HOME/.gitignore.d/$VCSH_REPO_NAME" ||
-               fatal "could not move '$tempfile' to '$HOME/.gitignore.d/$VCSH_REPO_NAME'" 53
-}
-
-setup() {
-       use
-       git config core.worktree     "$GIT_WORK_TREE"
-       git config core.excludesfile ".gitignore.d/$VCSH_REPO_NAME"
-       git config vcsh.vcsh         'true'
-       [ -e "$HOME/.gitignore.d/$VCSH_REPO_NAME" ] && git add -f "$HOME/.gitignore.d/$VCSH_REPO_NAME"
+       mv -f "$tempfile" "$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME" ||
+               fatal "could not move '$tempfile' to '$VCSH_BASE/.gitignore.d/$VCSH_REPO_NAME'" 53
 }
 
 }
 
-use() {
-       git_dir_exists
-       export GIT_WORK_TREE="$(git config --get core.worktree)"
-       export VCSH_DIRECTORY="$VCSH_REPO_NAME"
-}
+if [ ! "x$VCSH_GITIGNORE" = 'xexact' ] && [ ! "x$VCSH_GITIGNORE" = 'xrecursive' ]; then
+       fatal "'\$VCSH_GITIGNORE' must be either 'exact' or 'recursive'" 1
+fi
 
 if [ "$1" = 'clone' ]; then
 
 if [ "$1" = 'clone' ]; then
-       [ -z $2 ] && fatal "$1: please specify a remote" 1
+       [ -z "$2" ] && fatal "$1: please specify a remote" 1
        export VCSH_COMMAND="$1"
        GIT_REMOTE="$2"
        [ -n "$3" ] && VCSH_REPO_NAME="$3" || VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
        export VCSH_REPO_NAME
        export VCSH_COMMAND="$1"
        GIT_REMOTE="$2"
        [ -n "$3" ] && VCSH_REPO_NAME="$3" || VCSH_REPO_NAME=$(basename "$GIT_REMOTE" .git)
        export VCSH_REPO_NAME
-       export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
-elif [ "$1" = 'delete' ] ||
-     [ "$1" = 'enter' ] ||
-     [ "$1" = 'init' ] ||
-     [ "$1" = 'list-tracked-all' ] ||
-     [ "$1" = 'rename' ] ||
-     [ "$1" = 'run' ] ||
-     [ "$1" = 'seed-gitignore' ] ||
-     [ "$1" = 'setup' ]; then
+       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+elif [ "$1" = 'which' ]; then
+       [ -z "$2" ] && fatal "$1: please specify a filename" 1
+       [ -n "$3" ] && fatal "$1: too many parameters" 1
+       export VCSH_COMMAND="$1"
+       export VCSH_COMMAND_PARAMETER="$2"
+elif [ "$1" = 'delete' ]           ||
+     [ "$1" = 'enter' ]            ||
+     [ "$1" = 'init' ]             ||
+     [ "$1" = 'list-tracked-by' ]  ||
+     [ "$1" = 'rename' ]           ||
+     [ "$1" = 'run' ]              ||
+     [ "$1" = 'setup' ]            ||
+     [ "$1" = 'write-gitignore' ]; then
        [ -z $2 ]                      && fatal "$1: please specify repository to work on" 1
        [ "$1" = 'rename' -a -z "$3" ] && fatal "$1: please specify a target name" 1
        [ "$1" = 'run' -a -z "$3" ]    && fatal "$1: please specify a command" 1
        export VCSH_COMMAND="$1"
        export VCSH_REPO_NAME="$2"
        [ -z $2 ]                      && fatal "$1: please specify repository to work on" 1
        [ "$1" = 'rename' -a -z "$3" ] && fatal "$1: please specify a target name" 1
        [ "$1" = 'run' -a -z "$3" ]    && fatal "$1: please specify a command" 1
        export VCSH_COMMAND="$1"
        export VCSH_REPO_NAME="$2"
-       export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
-       [ "$VCSH_COMMAND" = 'rename' ]         && export GIT_DIR_NEW="$VCSH_BASE/$3.git"
-       if [ "$VCSH_COMMAND" = 'run' ]; then
-               shift 2
-               export VCSH_EXTERNAL_COMMAND="$*"
-               # Did we receive a directory instead of a name? Mangle the input to fit normal operation!
-               if echo $VCSH_REPO_NAME | grep -q '/'; then
-                       export GIT_DIR=$VCSH_REPO_NAME
-                       export VCSH_REPO_NAME=$(basename $VCSH_REPO_NAME .git)
-               fi
-       fi
-       [ "$VCSH_COMMAND" = 'seed-gitignore' ]
-elif [ "$1" = 'list' ]; then
+       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+       [ "$VCSH_COMMAND" = 'rename' ]         && export GIT_DIR_NEW="$VCSH_REPO_D/$3.git"
+       [ "$VCSH_COMMAND" = 'run' ] && shift 2 && export VCSH_EXTERNAL_COMMAND="$*"
+       [ "$VCSH_COMMAND" = 'write-gitignore' ]
+elif [ "$1" = 'list' ] ||
+     [ "$1" = 'list-tracked' ]; then
        export VCSH_COMMAND="$1"
        export VCSH_COMMAND="$1"
-elif [ -n "$1" ]; then
-       export VCSH_COMMAND=run
+elif [ -n "$2" ]; then
+       export VCSH_COMMAND='run'
        export VCSH_REPO_NAME="$1"
        export VCSH_REPO_NAME="$1"
-       export GIT_DIR="$VCSH_BASE/$VCSH_REPO_NAME.git"
+       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
        [ -d $GIT_DIR ] || { help; exit 1; }
        shift 1
        export VCSH_EXTERNAL_COMMAND="git $*"
        [ -d $GIT_DIR ] || { help; exit 1; }
        shift 1
        export VCSH_EXTERNAL_COMMAND="git $*"
+elif [ -n "$1" ]; then
+       export VCSH_COMMAND='enter'
+       export VCSH_REPO_NAME="$1"
+       export GIT_DIR="$VCSH_REPO_D/$VCSH_REPO_NAME.git"
+       [ -d $GIT_DIR ] || { help; exit 1; }
 else
        # $1 is empty, or 'help'
        help && exit
 fi
 
 else
        # $1 is empty, or 'help'
        help && exit
 fi
 
-for check_directory in "$VCSH_BASE" "$HOME/.gitignore.d"
+# Did we receive a directory instead of a name?
+# Mangle the input to fit normal operation.
+if echo $VCSH_REPO_NAME | grep -q '/'; then
+       export GIT_DIR=$VCSH_REPO_NAME
+       export VCSH_REPO_NAME=$(basename "$VCSH_REPO_NAME" .git)
+fi
+
+
+for check_directory in "$VCSH_REPO_D" "$VCSH_BASE/.gitignore.d"
 do
        if [ ! -d "$check_directory" ]; then
                if [ -e "$check_directory" ]; then
 do
        if [ ! -d "$check_directory" ]; then
                if [ -e "$check_directory" ]; then
@@ -237,5 +303,7 @@ done
 
 verbose "$VCSH_COMMAND begin"
 export VCSH_COMMAND=$(echo $VCSH_COMMAND | sed 's/-/_/g')
 
 verbose "$VCSH_COMMAND begin"
 export VCSH_COMMAND=$(echo $VCSH_COMMAND | sed 's/-/_/g')
+hook pre-command
 $VCSH_COMMAND
 $VCSH_COMMAND
+hook post-command
 verbose "$VCSH_COMMAND end, exiting"
 verbose "$VCSH_COMMAND end, exiting"
version controlled RC files

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