github
/
jgit
mirror of https://gitee.com/github-mirror-repo/jgit.git
1
0
Fork 0
Code Issues Releases Wiki Activity
Browse Source

Add better documentation to DirCacheCheckout 

Change-Id: I282b702d9e4cb19063d8e9503604538f80e955b7
Signed-off-by: Christian Halstrick <christian.halstrick@sap.com>
stable-2.3
Christian Halstrick 13 years ago
parent
e9cf705c6e
commit
1c4ee41dc0
1 changed files with 139 additions and 1 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 140
      org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheCheckout.java

140
org.eclipse.jgit/src/org/eclipse/jgit/dircache/DirCacheCheckout.java vendored
Unescape View File

@ -683,6 +683,8 @@ public class DirCacheCheckout {
}
if (i == null) {
// Nothing in Index
// At least one of Head, Index, Merge is not empty
// make sure not to overwrite untracked files
if (f != null) {
// A submodule is not a file. We should ignore it
@ -711,17 +713,37 @@ public class DirCacheCheckout {
*/
if (h == null)
// Nothing in Head
// Nothing in Index
// At least one of Head, Index, Merge is not empty
// -> only Merge contains something for this path. Use it!
// Potentially update the file
update(name, mId, mMode); // 1
else if (m == null)
// Nothing in Merge
// Something in Head
// Nothing in Index
// -> only Head contains something for this path and it should
// be deleted. Potentially removes the file!
remove(name); // 2
else { // 3
// Something in Merge
// Something in Head
// Nothing in Index
// -> Head and Merge contain something (maybe not the same) and
// in the index there is nothing (e.g. 'git rm ...' was
// called before). Ignore the cached deletion and use what we
// find in Merge. Potentially updates the file.
if (equalIdAndMode(hId, hMode, mId, mMode))
keep(dce);
else
conflict(name, dce, h, m);
}
} else {
// Something in Index
if (h == null) {
// Nothing in Head
// Something in Index
/**
* <pre>
* clean I==H I==M H M Result
@ -737,17 +759,54 @@ public class DirCacheCheckout {
*/
if (m == null || equalIdAndMode(mId, mMode, iId, iMode)) {
// Merge contains nothing or the same as Index
// Nothing in Head
// Something in Index
if (m==null && walk.isDirectoryFileConflict()) {
// Nothing in Merge and current path is part of
// File/Folder conflict
// Nothing in Head
// Something in Index
if (dce != null
&& (f == null || f.isModified(dce, true)))
// No file or file is dirty
// Nothing in Merge and current path is part of
// File/Folder conflict
// Nothing in Head
// Something in Index
// -> File folder conflict and Merge wants this
// path to be removed. Since the file is dirty
// report a conflict
conflict(name, dce, h, m);
else
// A file is present and file is not dirty
// Nothing in Merge and current path is part of
// File/Folder conflict
// Nothing in Head
// Something in Index
// -> File folder conflict and Merge wants this path
// to be removed. Since the file is not dirty remove
// file and index entry
remove(name);
} else
// Something in Merge or current path is not part of
// File/Folder conflict
// Merge contains nothing or the same as Index
// Nothing in Head
// Something in Index
// -> Merge contains nothing new. Keep the index.
keep(dce);
} else
// Merge contains something and it is not the same as Index
// Nothing in Head
// Something in Index
// -> Index contains something new (different from Head)
// and Merge is different from Index. Report a conflict
conflict(name, dce, h, m);
} else if (m == null) {
// Nothing in Merge
// Something in Head
// Something in Index
/**
* <pre>
@ -761,36 +820,115 @@ public class DirCacheCheckout {
*/
if (iMode == FileMode.GITLINK) {
// A submodule in Index
// Nothing in Merge
// Something in Head
// Submodules that disappear from the checkout must
// be removed from the index, but not deleted from disk.
remove(name);
} else {
// Something different from a submodule in Index
// Nothing in Merge
// Something in Head
if (equalIdAndMode(hId, hMode, iId, iMode)) {
// Index contains the same as Head
// Something different from a submodule in Index
// Nothing in Merge
// Something in Head
if (f == null || f.isModified(dce, true))
// file is dirty
// Index contains the same as Head
// Something different from a submodule in Index
// Nothing in Merge
// Something in Head
// -> file is dirty but is should be removed. That's
// a conflict
conflict(name, dce, h, m);
else
// file doesn't exist or is clean
// Index contains the same as Head
// Something different from a submodule in Index
// Nothing in Merge
// Something in Head
// -> Remove from index and delete the file
remove(name);
} else
// Index contains something different from Head
// Something different from a submodule in Index
// Nothing in Merge
// Something in Head
// -> Something new is in index (and maybe even on the
// filesystem). But Merge wants the path to be removed.
// Report a conflict
conflict(name, dce, h, m);
}
} else {
// Something in Merge
// Something in Head
// Something in Index
if (!equalIdAndMode(hId, hMode, mId, mMode)
&& !equalIdAndMode(hId, hMode, iId, iMode)
&& !equalIdAndMode(mId, mMode, iId, iMode))
// All three contents in Head, Merge, Index differ from each
// other
// -> All contents differ. Report a conflict.
conflict(name, dce, h, m);
else if (equalIdAndMode(hId, hMode, iId, iMode)
else
// At least two of the contents of Head, Index, Merge
// are the same
// Something in Merge
// Something in Head
// Something in Index
if (equalIdAndMode(hId, hMode, iId, iMode)
&& !equalIdAndMode(mId, mMode, iId, iMode)) {
// Head contains the same as Index. Merge differs
// Something in Merge
// For submodules just update the index with the new SHA-1
if (dce != null
&& FileMode.GITLINK.equals(dce.getFileMode())) {
// Index and Head contain the same submodule. Merge
// differs
// Something in Merge
// -> Nothing new in index. Move to merge.
// Potentially updates the file
// TODO check that we don't overwrite some unsaved
// file content
update(name, mId, mMode);
} else if (dce != null
&& (f == null || f.isModified(dce, true))) {
// File doesn't exist or is dirty
// Head and Index don't contain a submodule
// Head contains the same as Index. Merge differs
// Something in Merge
// -> Merge wants the index and file to be updated
// but the file is dirty. Report a conflict
conflict(name, dce, h, m);
} else {
// File exists and is clean
// Head and Index don't contain a submodule
// Head contains the same as Index. Merge differs
// Something in Merge
// -> Standard case when switching between branches:
// Nothing new in index but something different in
// Merge. Update index and file
update(name, mId, mMode);
}
} else {
// Head differs from index or merge is same as index
// At least two of the contents of Head, Index, Merge
// are the same
// Something in Merge
// Something in Head
// Something in Index
// Can be formulated as: Either all three states are
// equal or Merge is equal to Head or Index and differs
// to the other one.
// -> In all three cases we don't touch index and file.
keep(dce);
}
}

Write Preview
Loading…
Cancel
Save